Antibacterial and Biodegradable Packaging

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by yagmurilba
Last updated 5 years ago

Discipline:
Science
Subject:
Experiments

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Antibacterial and Biodegradable Packaging

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Purpose: to produce an antibacterial and biodegradable packaging material.Procedure:-Add two spoonful of polyviniyl alcohol into 100 mL of distilled water in a beaker. -Heat the mixture up to 80° C with a hot plate. Check with a digital thermometer. Stir the mixture during heating.-Add two spoonful of ZnO into the mixture when the PVA dissolved completely.-Add two spooful of aloe vera and continue stirring. -When the mixture becomes viscous enough pour it on a nonstick surface as a thin layer.-Wait 24 hours for it to solidify. -Check for the biodegradable property of it by putting a small piece into water.-Check for the antibacterial property of it by covering strawberries.

INTRODUCTION: Plastic is the general common term for a wide range of synthetic or semi-synthetic materials used in a huge, and growing, range of applications. The term ‘’plastic’’ is derived from the Greek word ''plastikos'' meanin 'able to be molded'. While plastics may be made from just about any organic polymer, most industrial plastic is made from petrochemicals.Damages: Plastic is degreaded only after some million years, recycling it is too expensive, burning it is too pollutining and its breaking down in landfills seriously pollutes the ground water and the soil. This causes a serious problem. Also, ost plastic is made from oil when the world is gradually running out of oil. Plastic pollution has the potential to poison animals, which can then adversely affect human food supplies. Some marine species, such as sea turtles, have been found to contain large proportions of plastics in their stomach. When this occurs, the animal typically starves, because the plastic blocks the animal's digestive tract. Additionally, there is a compoud in some plastics named bisphenol A which causes cancer. One of the worst enviromental effects of plastic bags is that they are non-biodegradable. The decomposition of plastic bags takes about 1000 years. In our country only 1% of the plastic bags are recycled.

Analysis:We tried adding different amount of compounds and in the first trials it was really fluid, then we tried again by putting more pva. Also, we understand that it is neccesary to stir the mixture for a long time after adding all the materials.

Nil Yağmur İlbaMert Karanfil 9/C

Conclusion: Pva adds consistency, and aloe vera adds viscidity to the material. Also ZnO changes the color of the liquid and it helps the material to be biodegradable.

Antibacterial: Anything that destroys bacteria or suppresses their growth or their ability to reproduce.Biodegradable: Capable of being broken down (decomposed) rapidly by the action of microorganisms.

Properties of the materials: Polyvinyl alcohol has excellent film forming, emulsifying and adhesive properties. Zinc oxide is an inorganic compound with the formula ZnO. Zinc oxide adds antibacterial quality to this mixture. Aloe vera contains salicylic acid which is an aspirin-like compound with anti -inflammatory, analgesic, and anti-bacterial properties.

Materials:-Polyviniyl alcohol (PVA)-Zinc oxide (ZnO)-Aloe vera plant -beaker-distilled water -hot plate -parafilm -stirrer-digital thermometer

ANTIBACTERIAL & BIODEGRADABLE PACKAGING

Usage Areas:Whether you are aware or not plastics play an important role in our lives. It is a very versatile substance and it can be used in almost everywhere such as;• Industry• Electronics• Construction• Treatment of Water• Textile• Biomedical• Transportation Industry• Foods

Alternate Production MethodsPlastics are 95% made out of polyethelene and polyester mixtures. However there are many more ways that plastics can be made. For example;• polistiren (3.7%)• polypropylene (0,75%)• polyamid and polyvinyl mixture(0,6%)• Polyvinyl alchohol, aloe vera and zinc oxide mixture (our way of producing plastics)


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