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Fully biodegradable composite material with excellent mechanical properties and preparation method thereof

A composite material, all-biological technology, which is applied in the field of full-biodegradable composite material and its preparation, achieves the effects of high production efficiency, low production cost and improved mechanical properties

Active Publication Date: 2020-04-24
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this area lacks a PBAT / thermoplastic starch composite material with excellent mechanical properties and simple preparation process

Method used

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  • Fully biodegradable composite material with excellent mechanical properties and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Weigh the following raw materials

[0024] Polybutylene adipate-polybutylene terephthalate copolymer (PBAT) 1000 g, tapioca starch 178.6 g, glycerin 71.4 g, nano-silica 3.6 g, plasticized ethylene-vinyl alcohol copolymer Compound (EVOH) 48 g. PBAT, tapioca starch and EVOH raw materials were dried in an electric blast drying oven at 95°C for 24 h, and then sealed and stored.

[0025] (2) Preparation of glycerol plasticized ethylene-vinyl alcohol copolymer (EVOH) compatibilizer

[0026] Put the dry EVOH pellets into a steel cup, place the steel cup in an oil bath at 185°C, add 20% EVOH quality glycerin to the steel cup, and divide the glycerin several times according to the plasticization situation join in. Stir slowly during the plasticizing process to fully plasticize the EVOH particles.

[0027] (3) Preparation of PBAT / thermoplastic starch / nano-silica / EVOH composites

[0028] a) Weigh 71.4 g of glycerin in a beaker, weigh 3.6 g of nano-silica, add nano-silica ...

Embodiment 2

[0033] (1) Weigh the following raw materials

[0034] Polybutylene adipate-polybutylene terephthalate copolymer (PBAT) 1000 g, tapioca starch 178.6 g, glycerin 71.4 g, nano-silica 3.6 g, maleic anhydride 18 g, plasticized ethylene-vinyl alcohol copolymer (EVOH) 48 g. PBAT, tapioca starch and EVOH raw materials were dried in an electric blast drying oven at 95°C for 24 h, and then sealed and stored.

[0035] (2) Preparation of glycerol plasticized ethylene-vinyl alcohol copolymer (EVOH) compatibilizer

[0036] Put the dry EVOH pellets into a steel cup, place the steel cup in an oil bath at 185°C, add 20% EVOH quality glycerin to the steel cup, and divide the glycerin several times according to the plasticization situation join in. Stir slowly during the plasticizing process to fully plasticize the EVOH particles.

[0037] (3) Preparation of PBAT / thermoplastic starch / nanometer silica / maleic anhydride / EVOH composite

[0038] a) Weigh 71.4 g of glycerin in a beaker, weigh 3.6 g...

Embodiment 3

[0043] (1) Weigh the following raw materials

[0044] Polybutylene adipate-polybutylene terephthalate copolymer (PBAT) 600 g, tapioca starch 642.9 g, glycerin 257.1 g, nano-silica 12.9 g, plasticized ethylene-vinyl alcohol copolymer Compound (EVOH) 60 g. PBAT and cassava starch raw materials were dried in an electric blast drying oven at 95 °C for 24 h, and then sealed and stored.

[0045] (2) Preparation of glycerol plasticized ethylene-vinyl alcohol copolymer (EVOH) compatibilizer

[0046] Put the dry EVOH pellets into a steel cup, place the steel cup in an oil bath at 185°C, add 20% EVOH quality glycerin to the steel cup, and divide the glycerin several times according to the plasticization situation join in. Stir slowly during the plasticizing process to fully plasticize the EVOH particles.

[0047] (3) Preparation of PBAT / thermoplastic starch / nano-silica / EVOH composites

[0048] a) Weigh 257.1 g of glycerin in a beaker, weigh 12.9 g of nano-silica, add nano-silica to...

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Abstract

The invention discloses a fully biodegradable composite material with excellent mechanical properties and a preparation method thereof, and belongs to the technical field of biodegradable composite materials. The composite material is prepared from the following components in percentage by weight: 15%-75% of a polybutylene adipate-polybutylene terephthalate copolymer (PBAT), 10%-60% of starch, 5%-25% of glycerol, 0%-5% of nano silicon dioxide, and 0%-20% of a compatibilizer. The full-biodegradable composite material is safe, non-toxic, excellent in mechanical properties and capable of being completely biodegraded. The preparation method is simple, easy to control and implement, high in operability and low in production cost, and can be applied to various fields.

Description

technical field [0001] The invention belongs to the technical field of biodegradable composite materials, in particular to a fully biodegradable composite material with excellent mechanical properties and a preparation method thereof. Background technique [0002] In recent years, more and more serious pollution has threatened people's living environment, and environmental protection materials such as bio-based and biodegradable have received extensive attention and attention. Among them, adipic acid-terephthalic acid-butylene glycol ester copolymer (PBAT) is favored by researchers because of its good thermal performance and biodegradability, and it has the characteristics of both BA and BT chain segments: fat The group chain segments make it maintain good flexibility and elongation at break; the rigid benzene ring structure can maintain a certain strength, thermal stability and impact performance of the material. However, the current high price of PBAT limits its large-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L23/08C08K5/053C08K3/36
CPCC08L67/02C08L3/02C08K2201/011C08L2201/06C08L2205/03C08L23/0861C08K5/053C08K3/36Y02W90/10
Inventor 刘文勇刘圣恭王志杰戴炳丰杨明明刘家豪
Owner HUNAN UNIV OF TECH
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