Homemade Bioplastic: potato vs. corn starch recipe
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- Опубликовано: 8 июл 2024
- Potato and corn starch recipe for DIY bioplastic at home:
00:00 intro
00:09 ingredients
00:14 utensils
00:21 mixing
01:11 cooking
01:45 pouring
02:02 drying
02:13 unmould
02:46 quantities & dimensions
02:57 handling
F.A.Q.
Q.: What is the effect of vinegar?
A.: The reasoning is you need an acid to break amylopectin into amylose (see video • Making biodegradable p... ) but in this video (see video • Homemade Bioplastic: o... ) I reproduced the recipe without vinegar and it still works, so I don't really know.
Q.: Where should I place to dry?
A.: You can leave to dry at open air inside your house, or put it in the sun if that's an option.
Q.: Can I use the oven to make it dry faster?
A.: See the video • Homemade Bioplastic: o... for details on oven drying.
Q.: My bioplastic doesn't look like the one on the video, what should I change?
A.: Take a look at these samples • Homemade Bioplastic : ... and see if you have a match, to identify if you have too much or too little of a certain ingredient. 
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The quality of this video is top notch! Really shows how hard you must have had to work on this. Thank you so much for putting this out💜💜😭
i owe u my research paper, thank you so much for this you are a life saver
dude what is the universal ratio for the ingredients? like for every tablespoon of cornstarch is every tablespoon of everything else? need help lol
@@janjeikobu5163 100 mL water, 15mL starch, 10mL vinegar, 10mL glycerin. Just multiply/divide all these numbers by the same amount for different quantities of plastic.
what is your research paper all about?
We’re u able to produce the bioplastic film
@@nata5212i cant make it💀 if anyone here did pls help
Loving these videos
Keep it going we need more
Thank you 🙏
3:23 this reminds me of a rainy day and the "window has fogged up from the cold and some rain drops are on the window
Hi, thank you so much for this video, I saw your recent video on the bio plastic bag with completely no air bubbles, was wondering if there was a way to make a bio plastic with this recipe but with little to no air bubbles? Thank you!
Nifty!
Do I have to use the stuff in the video like the cooking part where you put a bowl above the boiling water??
Hi, thank you for this video. I am experimenting with bioplastics with potato starch. It won't seal. Is there any way to fix it?
How to check which starch based film effective and what are the test to check the perfect bio plastic quality
Is it highly flammable?
Thx for the vid. Quick question: is there a way to fasten the hardening process?
Here: ruclips.net/video/XBjUPxaGcZQ/видео.html
Amazing video! Did you have to wait for a specific temperature before heating your mixture?
Not really, as long as it's simmering, it'll work.
Hello, what do you think should I add to the mixture to make the plastic hard enough to make a straw? I'm planning to make a bioplastic drinking straw. Thank you!
I wish I could tell you, I haven't managed to make a rigid sample with a specific shape.
Cool
What is the cost on making the bioplastic for the potato starch? How can I increase the production rate of this by myself?
Hello! We have a capstone research and it is all about creating bioplastics using strach extracted from air potatoes. I would like to ask you for the specific measurements that you used in the beginning?
I want to be enlightened regarding the specific ratio of the following ingredients
Hello, is this water soluble??
Can you please tell quantity of starch in gram u had used?
Good day! May I ask if can we achieve the same results with different ingredients, like in our research we used citric acid instead of vinegar and the starch used was extracted from a jackfruit seed
Citric acid works, yes! About the jackfruit I can't say because I didn't even know what it is, I had to google it. If this recipe doesn't work with jackfruit starch, maybe try the cassava starch recipe: ruclips.net/video/x8BVDnFWkIg/видео.html
Hello, is the glycerin used as a plasticizer? Would we obtain a more brittle plastic if we skipped the glycerin? Thanks
Yes, you can see the effect of glycerin in this video: ruclips.net/video/1hDXsOrf0AY/видео.html
Awesome video! I just wanted to know why you used different vinegar, glycerin, and water measures than in your casava recipe. Can this videos measurements be universal and replaced with any starch?
Potato and corn starches seem to interchangeable, but the others not so much, hence the different recipes.
Hi i actually wanted to make biodegradable plastic bottle and i want to know what to add to make it stiff?
Watch this video to see a more stiff example ruclips.net/video/1hDXsOrf0AY/видео.html
Hi. How did you dry your film? Our bioplastic keeps getting white molds when drying.
These samples were dried at room temperature, but if you live in a high humidity environment it might be more difficult.
Hi, I was wondering if any of the plastics had a strong scent to them. Or were they unscented?
After drying, they're pretty much unscented.
Hi, thank you for making such good explainatory video :) I was wondering what was the size of the mold you were using in this video ? Just trying to figure out proportions
or the average thickness of the protduct inside the mold
200 x 150 x 0.5 mm 2:46
May i ask if you did a tensile strength test to determine the difference between the two?
I want to test that but I'm not sure how to do it DIY style.
By hand they appear to have similar strength.
@@giestas Twist to make a sort of rope (unsure the texture of it) or roll into a sort of pipe, or fold 2-3 times to form a board that looks like a flat stick of gum, in order to get a more linear test and measure, though you'd require a force gauge to record the actual amount of force used at the time of rupture. You can use clamps to grab the ends. This would tell you which is stronger. 🙂
May I ask if there are alternatives for glycerol? Can we use coconut oil instead? Or maybe even honey?
Honey can work, I have a video on some tests: ruclips.net/video/lU1RiQTmLuA/видео.html
Looks good! What other fruits/vegetables can I use instead of potato or cornstarch? We're trying to find a fruit that hasn't been turned into bioplastic yet. We're hoping that we can find a fruit that is similar to the needed content with the potato or corn starch content. Thanks!
I've only tried these ones and cassava, but I'm sure there are many more options out there to be explored...
Thank you for this video, is it fine if im going to mix starch from 2 different subjects??? like potato and cassava starch??? or taro and cassava starch?
Some starches require more water than others, but you can definitely mix them, yes!
Hello! May I ask what type of glycerin did you use in the video? There are so many types and brands, and I don't know what to choose.
I don't have a specific brand to recommend, I just go for common vegetable glycerin.
@@giestas thank you so much!
Does the mixture hardens quickly of you add cold water or room temperature water to it?
Thank you for this video! I was wondering… What is actually the function of the vinegar?
See the F.A.Q. in the description.
Is they use sea water for steam the water path ? Which type of water u used for stemed the water ?
I just used regular tap water during the whole process.
I can replace the glycerin with something else. and both pectin and glycerin are food or pharmaceutical.... please❤
Hi! Thank you for this video. What material is the mold where the bioplastic is placed for drying?
It's a common silicone mold.
Hi, may I ask how you achieved that kind of consistency for your cornstarch bioplastic? I'm also researching cornstarch-based bioplastics, and I tried doing the same, but the results weren't great. Since I'm limited with the materials such as a molder, I tried using wax paper instead to place my mixture. However, cracks keep appearing☹
Cracks are usually caused by insufficient glycerin and/or water. If it still cracks, maybe try duct taping the waxed paper to a piece of cardboard so it doesn't shift during the drying period.
@@giestas thank you so much for the tip! I'll try doing this! ^^
@@mono.latte07 did it work?
@@mono.latte07 were u able to produce it?
@@gilchristacquah2368Hi, unfortunately, it did not work for me :(( Perhaps my method of doing it was incomplete in some way. If you're trying to do it, I suggest you try using a molder to ensure better outcomes
Hi, I would like to know how long does the plastic takes to decompose, thank you.
Here: ruclips.net/video/oub-YroMsR0/видео.html
Hi, may I ask what could have been the reason why there was a red spot that appeared during the fourth day in the cornstarch bioplastic mixture? The red spot got bigger on the eighth day.
Also, the mixtures of bioplastic made with cornstarch and potato starch have not yet really formed well because they have not hardened yet. What does this mean?
It might take a long while for all the water to evaporate from the bioplastic, so if it hasn't "hardened" after 8 days, wait a bit longer and check if it's gradually drying.
The red spot is a mystery :/
@@giestasHi, can you dry it quicker? Like microwave or oven? Thank you! This is really usefull! 😁🤗
@@nikola.acimovic the latest video is about drying in the oven: ruclips.net/video/XBjUPxaGcZQ/видео.html
Good day again, sir! I have another question. Is it okay if I use oil to cover the metal tray? Because the mixture is sticking to the tray and I can't peel it out. Does it have the same results with using a silicone mould?
Good question, but I can't say, I never tried using oil.
how about using baking paper?
great video!
have you ever tried to use pectin to waterproof the plastic?
also, do you think that lemon juice can make a substance for the vinegar?
I've seen some applications of pectin as a waterproofing agent for leather, but I haven't found a recipe for a homemade version.
You can use lemon juice yes. If possible, filter it with a paper coffee filter; but even then it might still take plenty more time for the bioplastic to dry.
@@giestas thanks for your reply!
another quick question, what would you recommend on adding or reducing from the mixture to accelerate the drying without an oven?
The less glycerin you had, the faster it'll dry (but the more rigid the plastic will be)
Hi i would like to know what u mean by parts is it spoon or cups thank u
When you see a recipe expressed in 'parts' that means you are looking at the recipe 'ratio', which is supposed to help you scale the quantity up and down.
Example: let's say you don't have measuring spoons at home and all you have is a small coffee cup. If the ratio called for 3:1:1:1, that would be 3 cups of water, 1 cup of starch, 1 cup of vinegar, 1 cup of glycerin.
Then, let's say you wanted a bioplastic that was double the size. You can use a coffee cup that is double the size, or, following the same ratio 3:1:1:1 all you need to do is double the numbers, so that would be: 6 cups of water, 2 cups of starch, 2 cups of vinegar, 2 cup of glycerin.
Do we need to use glycerol and what can we use instead of it
Here: ruclips.net/video/lU1RiQTmLuA/видео.html
How do you prevent folds from the edges when the bioplastic is in the drying stage?
The edges always end up with a few imperfections and I cut them in the end.
@@giestas thank you so much
Hi, such a great video
Just want to clarify first, is the bioplastic made waterproof or can support things such as groceries or not yet?
I haven't made strength tests yet. About the water resistance, I made some experiments: ruclips.net/video/DGp1-hdExMY/видео.html
Is the corn naturally sticky when being touched? Also, why does ours break so easily? Do we need to add more glycerin? Thank you!
Take a look at these samples and see if it matches one of them: ruclips.net/video/1hDXsOrf0AY/видео.html
Will the bioplastic then be waterproof or will it revert back into a gel if exposed to water?
Here is a test on that: ruclips.net/video/DGp1-hdExMY/видео.html
still trying to figure out what 2/3 gylercin means 😢 are there some othered measurements? 2/3 of 1 part?
2/3 of 1 part, yes.
Hello, Is there a faster way to dry the bioplastic?
With a dehydrator on high temperature (70ºC) you can dry it fast but it introduces a lot of small bubbles into the bioplastic. On low temperature (35ºC) it's quicker than air drying, but it might still take you something like three days. If you have an oven that does low temperatures and has a fan option, it'll work like a dehydrator.
hello is it possible to embed seeds along the making of that bio plastics?
since we aim to have a plantable bio bag or something
Small seeds, sure. What I don't know is if the seeds can be damaged by the temperature of the bioplastic coming from the stove.
Does keeping it in oven get it ready faster and how much time is needed
At lower temperatures like 70ºC (158ºF) yes, ideally with fan on. More than that and the oven will introduce a lot of bubbles in the bioplastic.
Hi there! May I know how long can the corn starch bioplastics last?
I haven't had a sample degrade at open air yet, but you can have a sense of how long it lasts under water here: ruclips.net/video/DA6U_lJMM3w/видео.html
is 1 part tablespoon?
is adding glycerin do you have any material to add
If you don't have glycerin, you can use honey instead. Here is the recipe: ruclips.net/video/lU1RiQTmLuA/видео.html
I've seen people make cool jewelry with bio resin would you suggest this recipe could work?
Hmm... I'm afraid not. You'd need something more solid I guess, whereas this is more suitable to make thin flexible films.
Hi I would like to ask also, in our research we are going to use mango peel to make bioplastic, will it work if we are going to use the same ingredients as you use and mix it with mango peel? And how many days it take for drying?
If you use the recipe in the video and add the mango peel already dried, then the peel will be an inert material, so it shouldn't change the drying time.
do you have some resistence test of this bio plastic?
Not yet, I'm working on a way to do it DIY style.
Hi! May I know if bioplastics harden? We are currently making a bioplastic brick made from the almost the same ingredients you utilized. Thank you!
It'll be hard if you don't introduce the plasticizer (in this case, glycerine). The trouble is it'll deform heavily while drying.
@@giestas will it not harden though despite the presence of glycerin? By the way, thank you so much for your response!
@@wilbertgutierrez2267 Glycerine makes it flexible, but I've only tried making thin films, so I can't be of much help about solid blocks like bricks.
Hi, my oven can go as low as 20 Celcius (but it has no fan), what is the most recommended temperature to dry it?
Most dehydrators go between 30ºC and 80ºC, so maybe try something in the middle like 50ºC?
@@giestas i am going to try 70 Celcius first, because i need it to be finished a bit faster, i am watching the oven for each hour
Hi, are these plastics dissolvable in acetone?
Good question, I don't know, guess I'll have to test that!
Hi! I was wondering for our capstone, if i added pectin to the mix how much should i add?
Just a guess: maybe start with 2% pectin?
@@giestas thanks! 😊
Do you think bioplastic could be cast in plaster moulds? I'm a sculpture student looking for resin substitute
Not with recipe. The water content is very high, it'll contract a lot, making the mould kind of irrelevant.
@giestas That's a shame, thank you for responding. Do you know of any recipes that don't contain so much water?
hey, want to ask...which type of material is best for making bioplastic? like corn cob, corn stalks, starch or cotton stalks?
Wish I could help, but from all those options, I only have experience with starch.
@@giestas thanx a lot for your quick response 🙏
How do you dry it? Like in a cold or hot place or just dry it in a table for a couple of days?
Check the FAQ in the description.
Thank you very much, we successfully made thiss bioplastic with the recipes@@giestas
This video is very nice 👍👍
I have a dought..
Is this bioplastic is suitable for packaging the liquid items?
You can see a test in this video: ruclips.net/video/DGp1-hdExMY/видео.html
Is there any other alternative for glycerin - couldnt get it here at my place 🤭
You can use honey instead, check it out here: ruclips.net/video/lU1RiQTmLuA/видео.html
is it ok to dry it using heat of sunlight? or is it better to dry ith in a room temperature with a fan on? I don't have a dehydrator
I never tested that, but I would guess it's ok to dry it in the sun.
Is there any results to your bioplastic?
What is the ideal temperature and time if I use an oven?
ruclips.net/video/XBjUPxaGcZQ/видео.html
What is the measurements did he use in the mixture of both starch?
He gave the measurements in parts by volume. So if you use a cup, you would have: 7parts = 7 cups. For glycerine that is two thirds of a part, you would use two thirds of a cup. And for starch, one part is one cap. If you use a liter, quart, tablespoon, you measure it out the same way, in parts by volume.
Hello! Can I ask you something for our research project? We made corn-based bioplastic and we dried it up using the oven. We followed your measurements in your youtube video however; if we put it in the open for an hour at 125C, it forms cracks. How can we fix this please?
Cracks usually appear when you don't have sufficient glycerin.
i used glycerin same as the reciep😢
Can I use a laboratory oven (about 90 celsius) to dry it quickly?
Probably yes, but you can check the effect of different temperatures here: ruclips.net/video/XBjUPxaGcZQ/видео.html
So what do you do with it after you make it?
Good question!
Hii can you answer this please
we make a bioplastic from a corn starc and to pili pulp starch, we mix it with glycerol(3ml), vinegar(2ml) and water(100ml)
the result are it can easily break (brittle)
why what the problem in our method please answerr thiss
If the result comes out brittle, try doubling the amount of glycerol.
May i ask what type of glycerin you used?
Just regular vegetable glycerin
can i ask do you have a specific kind of glycerin?
I used common vegetable glycerin.
At what stage can we add food colour?
Here is a video on the colored version: ruclips.net/video/4LY9Pvwy7yI/видео.html
Hi Giestas, Another Question, So I’ve tried out your recipe and i found many cracks appearing in just a single day, so I modified the recipe to add more water and glycerin and did 2 batches, but i still found cracks. I looked through some tutorials and i found most people layering the plastic paper thin, however my plastic is 5mm thick, could this be the problem I’m facing? Thanks in Advance
5mm should be fine. Most often cracks appear when there's something wrong with the amount or quality of glycerin. If you need to change the recipe, maybe look at these tests first: ruclips.net/video/1hDXsOrf0AY/видео.html
@@giestas Hi Giestas! Thanks for the Quick and helpful response, just like you predicted, thicker batches have cracked, but the paper / polythene thin batches are still perfect, so yeah thanks for all help and tip. I’m actually doing this for my grade 8 Science Project, Just letting you know :) Cheers
@@neelagandanu awesome, go for it!
It is really helpful indeed,
May I ask if I can use vegetable glycerin?
Hope you'll notice me, i really need your help
Thank you so much 😔💓
I have to confess I didn't know vegetable glycerin existed until now :)
Yes!!!!! Already did my research regarding that.
hi! Are there any ways to make bio plastic dry faster? some recipes say 24 hours is enough for corn based bio plastic to dry
The recipes with less water and glycerin ( ruclips.net/video/1hDXsOrf0AY/видео.html ) dry faster, but I've never gotten close to 24 hours.
@@giestas what if we put in the fridge or FREEZER (which definitely anything lower than 0 degrees Celsius)
@@wise_axolotl179 good question! I just posted a video testing it in the oven, but the freezer I haven't tried... yet!
hi, I tried your recipe and I got a beautiful result, which dried in less than 24 hours!!! but every time all the sides come out and turn up and curl. Can you tell me why and if there is a solution?
A bit is normal, also happens in my samples.
Some people use agar agar instead of glycerol
So can i use gelatin instead?
A glycerol substitute you might have at home is honey. Depending on the viscosity of your honey, you might have to increase the amount (try doubling it, for example).
Regarding the gelatin, I've never tried that; if you do, let us know if it works!
You can check out honey as a substitute to glycerin here: ruclips.net/video/lU1RiQTmLuA/видео.html
Hi i have a question. Can i dry it in the oven?
Here: ruclips.net/video/XBjUPxaGcZQ/видео.html
Why it's stock up when I putted in the tray and cracked when I dried it under the heat of the sun?
Maybe too little glycerin?
@@giestas thank you❤️
You said that your first try is the tapioca, does that experiment same with the quantities in this video? Or they have different quantities? Also, can I know what's the best bioplastic u made? Is it the tapioca? Potato starch? Or corn starch?
You can check out the tapioca bioplastic ratio here: ruclips.net/video/x8BVDnFWkIg/видео.html
It's difficult to say which is best, they have similar properties; but corn might be the way to go, if you want the least bubbles.
Good opportunity nice 🙏
But which starch is best
Potato. Ya. Corn
If you need the surface to be smooth, corn starch might be a better option.
30ml starch or grams?
What is the concentration of glycerine used
In this recipe I use pure glycerine, not a solution of glycerine in water.
Nice video! Whats the difference of using glycerin vs. Glycerol?
Two names for the same substance. The designation "glycerin" might be more common in household applications.
Hi may I ask what reference did you use for the ratios of ingredients?
I just googled a few recipes and refined the ratio with trial and error.
Hello! Is there any ways to speed up the drying? if needed dehydrator, how many degrees is needed, and how many hours?
With a dehydrator on high temperature (70ºC) you can dry it fast but it introduces a lot of small bubbles into the bioplastic. On low temperature (35ºC) it's quicker than air drying, but it might still take you something like three days.
Can i use oven instead of dehydrator?
If it goes down to those low temperatures yes; if it has a fan option, even better.
@@giestas This reacts a lot like epoxy resin and two way to remove bubbles would be to put your mold in air pressure pot that suppresses the air bubbles or the opposite that would be to use a vacuum pot that would pull the air out your starches. I know that the pressure pots can go for days if needed but I'm not that sure you could go that long in time with a vacuum pot.
@@giestas my oven can go as low as 20 Celcius (but it has no fan), what is the most recommended temperature to dry it?
How can prevent the bubbles from appearing?
I don't have a good method yet; I tried a torch, like you'd use in resin, but I can't get it to work.
Can I replace vinegar by lemon juice
You can do it without, as in this case: ruclips.net/video/XBjUPxaGcZQ/видео.html
Is this plastics are stretchable like polyethylene ?
Maybe what you have in mind is more like this: ruclips.net/video/Us9XAzjRNzE/видео.html
hi! we're planning to do a capstone project about bioplastics, would it be possible if we use the starch extracted from mung beans? (it's a common household ingredient in my country)
Also, what specific steps do I need to do if I want my bioplastic to be transparent and texture similar to non biodegradable plastics?(we are planning to make a plastic bag where u can put things out of this bioplastic)
I haven't tried mung bean starch yet, you can start by trying this recipe or the recipe for cassava starch and see if either works.
@@giestas will I get the same consistency if I use starch?
did the mung bean work?
@@mc.shn_9472 hi hii, i'm assuming filipino ka rin? hehe pero sadly bago pa man namin matry kung gagana nga, nareject na siya title proposal palang kasi hindi raw cost-effective :((
Hi, may I know how long it will take to degrade?
I've tested it underwater, you can see the results here: ruclips.net/video/DA6U_lJMM3w/видео.html
Is this biodegradable under natural conditions unlike PLA?
Here: ruclips.net/video/oub-YroMsR0/видео.html
How did you dry it Sir.??
It was dried at room temperature; in hot weather it might take less then a week, in the cold it might take a bit more.
what is the use of Vinegar?
It breaks the molecular structure of the starch, which changes into longer chains (polymer).
Do these dissolve in water? and are these edible?
ruclips.net/video/DA6U_lJMM3w/видео.html