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Toughness-increasing polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of toughened polylactic acid composite material and its preparation, can solve the problems of resource waste, no technology transformation application, environmental pollution, etc., achieve low cost, good mechanical properties, and reduce production costs Effect

Inactive Publication Date: 2011-06-15
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for such a huge resource, so far, there is no technology that can transform it and apply it in large quantities.
Every year, more than 95% of lignin is still directly discharged into rivers as "black liquor" or burned directly after concentration, which wastes resources and causes great pollution to the environment

Method used

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  • Toughness-increasing polylactic acid composite material and preparation method thereof
  • Toughness-increasing polylactic acid composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Take 76% (by mass percentage, the same below) polylactic acid (weight average molecular weight 160,000, melting point 150 ° C), 19% cellulose enzymatic lignin, 5% HD800E (Nanjing Huadu Technology Industrial Co., Ltd.) and mix evenly, The mixed material is added into a twin-screw machine, melted and blended, extruded and granulated to form a composite material.

[0030] The temperature setting and processing conditions of each zone of the screw are: the temperature of zones 1 to 7 is 160°C, 165°C, 170°C, 175°C, 180°C, 180°C, 160°C, the temperature of the head is 165°C, and the temperature is 3 to 5 minutes. , the pressure is 12MPa, and the feeding speed is 398rpm.

Embodiment 2

[0032] Take 72% polylactic acid (weight average molecular weight 160,000, melting point 150°C), 18% cellulose enzymatic lignin, 10% HD900V (Nanjing Huadu Technology Industrial Co., Ltd.) and mix evenly, and add the mixture to the twin-screw machine , through melt blending, extruded and granulated into composite materials.

[0033] The temperature setting and processing conditions of each zone of the screw are: the temperature of zones 1 to 7 is 160°C, 165°C, 170°C, 175°C, 180°C, 180°C, 160°C, the temperature of the head is 165°C, and the temperature is 3 to 5 minutes. , the pressure is 12MPa, and the feeding speed is 398rpm.

Embodiment 3

[0035] Take 64% polylactic acid (weight average molecular weight 160,000, melting point 150°C), 16% cellulose enzymatic lignin, 20% HD800E (Nanjing Huadu Technology Industrial Co., Ltd.) and mix evenly, and add the mixture to the twin-screw machine , through melt blending, extruded and granulated into composite materials.

[0036] The temperature setting and processing conditions of each zone of the screw are: the temperature of zones 1 to 7 is 160°C, 165°C, 170°C, 175°C, 180°C, 180°C, 160°C, the temperature of the head is 165°C, and the temperature is 3 to 5 minutes. , the pressure is 12MPa, and the feeding speed is 398rpm.

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Abstract

The invention discloses a toughness-increasing polylactic acid composite material and a preparation method thereof. The method comprises the steps of: mixing 56 to 76 percent of polylactic acid, 8 to 24 percent of lignin and 5 to 30 percent of toughening agent uniformly; and melting a mixture and performing extrusion granulation by using a twin screw extruder to obtain the toughness-increasing polylactic acid composite material. In the method, an abundant and cheap renewable biological resource, namely the lignin is adopted to fill a biodegradable material, namely the polylactic acid to reduce production cost, compatibilizing and toughness-increasing effects are achieved by adding an elastomer grafted maleic anhydride compatilizer with compatibilizing and toughness-increasing effects to ensure that the composite material has better mechanical properties and certain biodegradability, the disadvantage of the brittleness of a polylactic acid material is also overcome, and the material issimple in preparation technology and low in cost, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a toughened polylactic acid composite material and a preparation method thereof. Background technique [0002] Today, as fossil resources are increasingly tense and environmental issues are increasingly valued by the public, the characteristics of natural polymer materials, such as renewable, biodegradable, abundant reserves, low price, and environmental protection, are extremely in line with the requirements of sustainable development. more and more people's attention and attention. The development and promotion of biodegradable materials and high-value utilization of biological resources have become major research topics for contemporary economic and social development. [0003] Polylactic acid is a new type of polyester biomaterial that uses plant starch as the initial raw material and is fermented and polycondensed. It is non-toxic, non-irritating, and has good biocompatibil...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/00B29B9/06B29C47/92B29C48/92
CPCB29C48/04
Inventor 欧阳文竹黄勇
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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