From powdered vegetables, female students create 'nylon' bags that can dissolve in water

The bag is made of "edible" ingredients, after use it can decompose so it is completely environmentally friendly and safe for users' health.

Prepared from Agar powder and gelatin powder

This is the "unique - strange" product of two girls Nguyen Cao Hoai Thanh and Le Bui Huong Nhu , a student of 12B1 Tam Giang High School, Phong Dien, Thua Thien Hue.

Your self-destruct bags are made of 100% natural, can be used to contain safe foods and can replace ordinary plastic bags today.

Nguyen Cao Hoai Thanh shared that convenient plastic bags are extremely popular items in life but the more convenient they are, the higher their risks to human health and the environment. The use of plastic bags has gone deep into the lifestyle of urban and rural people because it is too convenient, with extremely low prices if not for free. Consequently, the environmental pollution caused by plastic bags has reached an 'alarming' level.

The process of making biodegradable bags from vegetable powder and gelatin.

Thanh said that on the market there are many environmentally friendly products to replace plastic bags, such as: paper bags, cloth bags, bags made from corn flour, bags made of cassava flour and bio-plastic, making bags. From potato peels and bio-plastics . However, each of these types of bags has certain advantages and limitations and high prices.

'This has prompted us to start researching, creating a new type of biodegradable bag products from environmentally friendly vegetable powder, not affecting human health , ' Thanh said.

To create this type of bag, the two of you conducted a lot of experiments and found the optimal formula to combine the two main ingredients: Agar powder and gelatin powder . Vegetable powder is derived from plants used for food processing, while gelatin extracted from collagen is found in bones, skin of animals such as pig skin or in plant collagen such as red algae, fruits . Gelatin is used popular in the food, pharmaceutical and cosmetic industries.

Huong Nhu said, these two ingredients are mixed in a ratio of 5 grams of ground vegetable powder and 10 grams of gelatin powder for 400 ml of water. Accordingly, add the vegetable powder and gelatin powder to the water in proportion, stir and boil the mixture. Then, reduce the mixture temperature to about 50oC and conduct a mixture on the surface of the mold making bag. After 24 hours, the dry mixture will be removed using 2 layers of Agar water to form a bag.

Bags for storing and preserving fruits in normal conditions.

Reusable as fertilizer, glue

The biodegradable bag made of vegetable powder is tested in a variety of conditions, and gives good results. Under low temperature conditions from 0 ° C to -10 ° C in the freezer compartment, 1.7 to 5 ° C in the refrigerator compartment, until normal indoor temperature, dry food bag and storage for 1 week still ensures quality. In particular, the bag can be reused by putting it in water to make a soft bag and then use it as fertilizer for plants or paper glue. When burning, the bag burns to ash without odor, non-toxic.

Food storage and packaging bags in the refrigerator.

Teacher Nguyen Van Phuc, a teacher instructing you to implement the topic, adds that this type of bag is easy to produce from 100% organic materials, quickly decomposes so it is environmentally friendly. At the same time the price is also quite reasonable, only 3 times the price of ordinary plastic bags.

However, this type of bag still has some limitations, such as it is only suitable for storing dried foods, poor resistance to water, low aesthetics, diversified designs. You also said that you will continue to research to increase toughness, improve waterproof ability as well as reduce product cost.

Prof. Dr. Tran Huu Dang, Chairman of the Union of Science and Technology Associations of Thua Thien Hue, assessing the topic of the two of you is very creative and highly applicable.

"This idea is one of the solutions that contribute to minimizing the alarming 'white pollution'," stressed Prof. Tran Huu Mot and hoped to have the interest of relaying from many sides of society to produce. Better finishes and soon life.