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Starch-based biodegradable plastic and preparation method thereof

A biodegradable plastic and starch-based technology, applied in the field of plastic products, can solve the problems of insufficient reaction uniformity, increase the contact surface area and contact frequency between solid pharmaceuticals and starch molecules, etc., so as to improve the insufficient reaction uniformity and good economic Benefit and social benefit, the effect of stable performance

Active Publication Date: 2013-04-17
广西农垦明阳生化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] (1) Add an activator to the dry starch, and perform an activation pretreatment at 95-100°C for 30 minutes; the activator is a hydroxide, and the weight of the activator is 0.3-2.0 per 100 parts by weight of the dry starch ; The purpose of activation pretreatment is to increase the contact surface area and contact frequency between solid medicament and starch molecules, improve the problem of insufficient reaction uniformity of dry solid phase method, and improve reaction efficiency

Method used

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  • Starch-based biodegradable plastic and preparation method thereof

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Embodiment 1

[0033]Weigh 100 parts by weight of cassava dry starch, add 0.3 parts by weight of activator solid sodium hydroxide (ground into powder), and perform activation treatment at 95-100° C. for 30 minutes. Then add 1 part of esterification agent sodium trimetaphosphate, and carry out esterification reaction at 120-125° C. for 1 hour. Add 2.5 parts by weight of solid medicament coupling agent titanate to the product after esterification reaction, and carry out phase encapsulation reaction under a fully stirred state, the reaction temperature is 125-130° C., and the reaction time is 50 minutes. Finally, it is blended with ethylene / acrylic acid (EAA) copolymer, ethylene / vinyl alcohol (EVOH) copolymer, polyvinyl alcohol (PVA), plasticizer, and other additives to make plastic products.

Embodiment 2

[0035] Weigh 100 parts by weight of cassava dry starch, add 0.8 parts by weight of activator solid sodium hydroxide (ground into powder), and perform activation treatment at 95-100° C. for 30 minutes. Then, 1.2 parts by weight of esterification agent sodium trimetaphosphate was added, and the esterification reaction was carried out at 120-125° C. for 1 hour. Add 3.5 parts by weight of solid drug coupling agent aluminate to the product that has undergone the esterification reaction, and carry out phase encapsulation reaction under a fully stirred state. The reaction temperature is 125-130° C., and the reaction time is 40 minutes. Finally, it is blended with ethylene / acrylic acid (EAA) copolymer, ethylene / vinyl alcohol (EVOH) copolymer, polyvinyl alcohol (PVA), plasticizer, and other additives to make plastic products.

Embodiment 3

[0037] Weigh 100 parts by weight of tapioca starch, add 1.0 parts by weight of activator solid sodium hydroxide (ground into powder) in the early stage of the reaction, and perform activation pretreatment at 95-100°C for 30 minutes; then add 1 part by weight of esterification agent Sodium trimetaphosphate, carry out esterification reaction at 120-125°C for 1 hour; then add 3.0 parts by weight of solid drug coupling agent borate, and carry out phase wrapping reaction under fully stirred state, the reaction temperature is 125- 130°C, reaction time 40-50 minutes; obtain modified starch, and ethylene / acrylic acid (EAA) copolymer, ethylene / vinyl alcohol (EVOH) copolymer, polyvinyl alcohol (PVA), plasticizer, other additives, etc. Blending to make biodegradable plastic products.

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Abstract

The invention provides a method for preparing starch-based biodegradable plastic. The starch-based biodegradable plastic is prepared by using cassava starch as a raw material and using a modified starch and biodegradable high-molecular polymer blending technology line. The modified starch is prepared by activating dry starch, adding an esterification reagent to the pretreated activated starch, and then adding a solid coupling agent. The biodegradable plastic products are prepared by blending the modified starch, an ethane / vinyl alcohol copolymer, polyvinyl alcohol, a plasticizer and an auxiliary agent.

Description

technical field [0001] The invention relates to a plastic product, in particular to a biodegradable plastic made by compounding modified starch and plastic and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the scale of petroleum synthetic plastics industry is also expanding rapidly, and plastic products are used in more and more industries. In 2010, the world's plastic consumption is estimated to be 328 million tons, and China's plastic consumption is estimated to exceed 56 million tons. Plastic products provide convenience for industry, agriculture and daily life, but also generate a large amount of waste. These wastes exist in solid form, and their sources are mostly disposable plastic products such as packaging bags, beverage bottles, and agricultural mulch. These wastes are bulky and take a long time to decompose, making them very difficult to degrade in the natural environment. The treatment methods of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08K5/56C08K5/55C08L23/16C08L23/08C08L29/04
Inventor 谢晓明崔建明潘瑞坚朱其虎陈有志
Owner 广西农垦明阳生化有限公司
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