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Thermoplastic plant protein/polylactic acid blend material and preparation method thereof

A vegetable protein and polylactic acid technology, applied in the field of thermoplastic vegetable protein/polylactic acid blend materials and their preparation, can solve the problems of low elongation at break, insufficient toughness and tear resistance, and brittle film, and avoid phase Separation, excellent comprehensive mechanical properties, and the effect of improving stability

Inactive Publication Date: 2011-08-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blending of thermoplastic vegetable protein / polylactic acid can improve the processing performance of thermoplastic vegetable protein, and at the same time, it can have a better plasticizing effect on polylactic acid, and solve the problem of insufficient processing performance, toughness and tear resistance of polylactic acid, and low elongation at break , brittle film and other problems, provide a new method of producing environmentally friendly plant protein / polylactic acid thermoplastic materials using natural plant protein as raw material, and serve for the large-scale development and utilization of renewable resource plant protein

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Take 1 part of thermoplastic vegetable protein, 99 parts of poly DL-lactic acid, and 1 part of maleic anhydride in a high-speed mixer for 5 minutes, dry at a temperature of 30 ° C for 12 hours, and control the temperature at 100 ° C The blended material was melt-blended in a twin-screw extruder for 5 minutes, and pelletized at 110° C. and 1 MPa to obtain a fully biodegradable thermoplastic vegetable protein / polylactic acid blended material.

Embodiment 2

[0016] Example 2: Take 99 parts of thermoplastic vegetable protein, 1 part of poly-L-lactic acid, and 10 parts of dibutyl phthalate by weight, stir in a high-speed mixer for 20 minutes, dry at a temperature of 60 ° C for 8 hours, and control the temperature at The blend was melt-blended in a twin-screw extruder at 140°C for 10 minutes, and pelletized at 150°C and 0.1 MPa to obtain a fully biodegradable thermoplastic vegetable protein / polylactic acid blend material.

Embodiment 3

[0017] Embodiment 3: Get 10 parts of thermoplastic vegetable protein, 90 parts of poly DL-lactic acid copolymers by weight, 3 parts of tributyl citrate and 3 parts of glycerol, 7 parts of Polyethylene Glycol and stir in high-speed mixer 8 Minutes, dry at 40°C for 10 hours, control the temperature at 110°C, blend the melt blended material in a twin-screw extruder for 6 minutes, and granulate at 120°C and 0.7MPa to obtain a completely biodegradable thermoplastic vegetable protein / polylactic acid co- mix materials.

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PUM

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Abstract

The invention discloses a thermoplastic plant protein / polylactic acid blend material and a preparation method thereof. The blend material comprises the following raw materials in parts by weight: 1-99 parts of thermoplastic plant protein, 1-99 parts of polylactic acid, 0-10 parts of crosslinking agent and 0-10 parts of plasticizer. The preparation method comprises the following steps: placing theraw materials in a high-speed mixer to stir for 5-20 minutes, drying at 30-60 DEG C for 8-12 hours, melting and blending the mixed materials in a twin-screw extruder at 100-140 DEG C for 5-10 minutes, and pelleting at 110-150 DEG C and 0.1-1MPa. The product of the invention has good processing property, and excellent thermoplastic processing property and mechanical property during plastic extruding, blow molding, injection molding and foaming; and after used, the product is completely degraded and can be widely used in the production and processing fields such as chemical engineering, mulch, mechanical and electrical, building material, package and environmental protection.

Description

(1) Technical field [0001] The invention relates to a thermoplastic vegetable protein / polylactic acid blend material and a preparation method thereof. (2) Background technology [0002] Every year, 150 million tons of limited petrochemical resources such as oil and natural gas are used to chemically synthesize "synthetic polymers". In order to reduce the impact of waste synthetic polymer materials on the environment and the use of limited resources, rebuild a sustainable human Society has become the consensus of countries all over the world. To achieve the sustainable development of the world economy, one of the frontiers of related research at home and abroad is to use clean production technology to modify and synthesize renewable biomass resources into environmentally friendly polymer materials that meet the requirements of use, reducing the impact on limited resources. Consumption, to reduce the pollution of the environment after the use of materials, for this reason, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L89/00C08L67/04B29B9/06
Inventor 罗学刚徐东
Owner SOUTHWEAT UNIV OF SCI & TECH