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Nitrile rubber-modified polylactic acid composite material and preparation method thereof

Inactive Publication Date: 2017-09-15
苏州奥宇包装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the toughening agent in the prior art has poor compatibility with polylactic acid, and the toughening agent with good compatibility with it is not enough to enhance performances such as water resistance, abrasion resistance, heat resistance, and aging resistance. significantly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of nitrile rubber modified polylactic acid composite material, by weight, described composite material comprises following components: Manila hemp fiber 12 parts, hemp fiber 3 parts, banana leaf fiber 5 parts, nitrile rubber 12 parts, 8 parts of polycaprolactone, 3 parts of polyurethane, 1 part of dicumyl peroxide, 3 parts of L-lactide monomer, 1 part of maleic anhydride, 25 parts of polylactic acid.

[0021] The preparation method of described a kind of nitrile rubber modified polylactic acid composite material, comprises the following steps:

[0022] (1) using a mass fraction of 15% sulfuric acid solution to process Manila hemp fiber, hemp fiber and banana leaf fiber, reacting for 1 hour;

[0023] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum oven for 1 hour to obtain a fiber powder, wherein the degree of vacuum is -0.5 Pa, and the temperature is 70 ℃;

[0024] (3) The fiber powder is treated w...

Embodiment 2

[0028] A kind of nitrile rubber modified polylactic acid composite material, by weight, described composite material comprises following components: Manila hemp fiber 23 parts, hemp fiber 12 parts, banana leaf fiber 12 parts, nitrile rubber 22 parts, 13 parts of polycaprolactone, 8 parts of polyurethane, 7 parts of dicumyl peroxide, 5 parts of L-lactide monomer, 5 parts of maleic anhydride, and 50 parts of polylactic acid.

[0029] The preparation method of described a kind of nitrile rubber modified polylactic acid composite material, comprises the following steps:

[0030] (1) adopting the sulfuric acid solution that mass fraction is 32% to process Manila hemp fiber, hemp fiber and banana leaf fiber, reacted for 3 hours;

[0031] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, then place it in a vacuum drying oven and dry it for 2 hours to obtain fiber powder, wherein the vacuum degree is -0.3Pa, and the temperature is 82 ℃;

[0032] (3)...

Embodiment 3

[0036] A kind of nitrile rubber modified polylactic acid composite material, by weight, described composite material comprises following components: Manila hemp fiber 29 parts, hemp fiber 15 parts, banana leaf fiber 16 parts, nitrile rubber 26 parts, 17 parts of polycaprolactone, 11 parts of polyurethane, 9 parts of dicumyl peroxide, 8 parts of L-lactide monomer, 7 parts of maleic anhydride, and 55 parts of polylactic acid.

[0037] The preparation method of described a kind of nitrile rubber modified polylactic acid composite material, comprises the following steps:

[0038] (1) adopting the sulfuric acid solution that mass fraction is 35% to process Manila hemp fiber, hemp fiber and banana leaf fiber, reacted for 3.5 hours;

[0039] (2) Place the fiber treated in step (1) in an oven to dry, and pulverize the fiber, and then dry it in a vacuum oven for 2.5 hours to obtain a fiber powder, wherein the vacuum degree is -0.2Pa, and the temperature is 85 ℃;

[0040] (3) The fibe...

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PUM

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Abstract

The invention discloses a nitrile rubber-modified polylactic acid composite material and a preparation method thereof. The composite material comprises, by weight, 12 to 29 parts of Manila hemp fibers, 3 to 15 parts of China hemp fibers, 5 to 16 parts of banana leaf fibers, 12 to 26 parts of nitrile rubber, 8 to 17 parts of polycaprolactone, 3 to 11 parts of polyurethane, 1 to 9 parts of dicumyl peroxide, 3 to 8 parts of a L-lactide monomer, 1 to 7 parts of maleic anhydride and 25 to 55 parts of polylactic acid. The nitrile rubber-modified polylactic acid composite material flexibilizer has good thermodynamical compatibility with polylactic acid. The composite material has obvious toughening effects.

Description

technical field [0001] The invention belongs to the field of packaging materials, and relates to a polylactic acid packaging material, in particular to a polylactic acid composite material modified by nitrile rubber and a preparation method thereof. Background technique [0002] As a bioplastic, polylactic acid has high strength and modulus and is expected to replace petroleum-based polymers. However, its toughness is poor, its impact resistance is poor, and its crystallization is slow. In order to improve its toughness and broaden its application range, the work based on its modification has been carried out in full swing in recent years. Compared with synthesizing new biodegradable materials to obtain excellent properties, it is more economical and convenient to toughen PLA by melt blending. For the toughening and modification of polylactic acid, the current focus is mainly on the use of biocompatible polymers for toughening. The main toughening agents are aliphatic polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08L1/02C08L9/02C08L75/04
CPCC08L67/04C08L2205/025C08L2205/035C08L2205/06C08L2205/16C08L97/02C08L1/02C08L9/02C08L75/04
Inventor 顾建芳
Owner 苏州奥宇包装科技有限公司
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