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A kind of heat-resistant polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of polylactic acid material and its preparation, heat-resistant polylactic acid composite material and its preparation field, can solve the problems of high cost, poor mechanical properties, etc., and achieve low price, strong processing performance, high heat The effect of short treatment time

Active Publication Date: 2012-02-22
ZHEJIANG HISUN BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the heat resistance of the polylactic acid composite material after heat treatment is significantly improved; but the filler material used is modified talcum powder, which has high cost and poor mechanical properties

Method used

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  • A kind of heat-resistant polylactic acid composite material and preparation method thereof
  • A kind of heat-resistant polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 99 parts of vacuum-dried poly-L-lactic acid with low D (poly D-lactic acid) content, 1 part of zinc phenylphosphite as a nucleating agent, 20 parts of inorganic filler talcum powder with a particle size of 1250 mesh to 12500 mesh, and 10 parts of starch acetate , 20 parts of wood fiber, 0.1 part of silane coupling agent γ-(2,3-glycidoxy) propyltrimethoxysilane, 1 part of toughening modifier polycaprolactone, 0.3 part of lubricant aluminum stearate Parts are melted and blended uniformly in a twin-screw extruder and then extruded to pelletize. The temperature settings of each section of the screw are: 190°C, 200°C, 210°C, 220°C, 210°C, and the speed is 50rpm. After granulation, injection molding is carried out in an injection molding machine. The injection temperature is 210°C, the injection pressure is 100 MPa, and the residence time is about 40 seconds. The samples obtained by injection molding were heat-treated in an oven at a constant temperature of 80° C. for 180 min...

Embodiment 2

[0031] Vacuum-dried low D (poly D-lactic acid) content poly-L-lactic acid 89 parts, nucleating agent zinc phenylphosphinate 1 part, particle size 1250 mesh-12500 mesh inorganic filler talcum powder 10 parts, starch laurate 20 parts, 10 parts of bamboo fiber, 1 part of silane coupling agent γ-aminopropyltriethoxysilane, 5 parts of toughening modifier polybutene-adipic acid-terephthalic acid, lubricant stearic acid Calcium 0.5 part was melted and blended uniformly in a twin-screw extruder, and then extruded and granulated. The temperature settings of each section of the screw were: 180°C, 190°C, 200°C, 210°C, 200°C, and the rotation speed was 30rpm. After granulation, injection molding is carried out in an injection molding machine. The injection temperature is 180°C, the injection pressure is 80MPa, and the residence time is about 40 seconds. The sample obtained by injection molding was kept in an oven at a constant temperature of 80° C. for 30 minutes. Its mechanical properti...

Embodiment 3

[0033] 69 parts of vacuum-dried low-D (poly D-lactic acid) content poly-L-lactic acid, 1 part of nucleating agent zinc phenylphosphate, 40 parts of inorganic filler calcium carbonate with a particle size of 1250 mesh to 12500 mesh, 30 parts of starch, flax fiber 5 parts, 0.1 part of silane coupling agent γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 1 part of toughening modifier polycaprolactone, 0.8 part of lubricant aluminum stearate in bis In the screw extruder, melt and blend evenly and then extrude and granulate. The temperature settings of each section of the screw are: 160°C, 170°C, 180°C, 190°C, 180°C, and the rotation speed is 50rpm. After granulation, injection molding is carried out in an injection molding machine. The injection temperature is 210°C, the injection pressure is 90 MPa, and the residence time is about 45 seconds. The samples obtained by injection molding were kept in an oven at a constant temperature of 90° C. for 30 minutes. Its mechanical properties a...

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Abstract

The invention provides a heat-resistant polylactic acid composite material and a preparation method thereof, belonging to the technical field of polymer materials. It solves the technical problems such as poor biodegradability, high cost and poor mechanical properties of existing methods for preparing polylactic acid cross-linked materials and products in polymer cross-linked materials. The heat-resistant polylactic acid composite material includes the following components by weight: 50-99 parts of polylactic acid resin with oligo-D lactic acid content; 0.1-15 parts of nucleating agent; 1-50 parts of starch or modified starch; The poly-D lactic acid content in the polylactic acid resin with the oligo-D lactic acid content is lower than 5wt%. The preparation method of the composite material comprises the following steps: a. mixing and granulating; b. injection molding; c. heat treatment. The composite material has excellent mechanical properties and good heat resistance. The preparation method of the composite material has the advantages of simple technological process, strong processability and low cost, and can realize large-scale industrialized production.

Description

technical field [0001] The invention relates to a polylactic acid material and a preparation method thereof, in particular to a heat-resistant polylactic acid composite material and a preparation method thereof; it belongs to the technical field of polymer materials. Background technique [0002] Resources and the environment are major issues facing human beings to achieve sustainable development. With the continuous development of petroleum and other mineral resources, the global energy is gradually depleting. In addition, the waste of petroleum synthetic polymer materials brings environmental damage Negative effects such as "white pollution" have attracted widespread attention. [0003] In order to solve the problem of "white pollution" caused by waste plastics, many countries have proposed many practical methods, among which the most effective and thorough method is to use biodegradable polymer materials instead of petroleum synthetic polymer materials. Compared with pet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/02C08L3/04C08K13/04C08K7/02C08K3/34C08K3/26
Inventor 边新超刘炎龙梁伟陈学思陈志明王若松
Owner ZHEJIANG HISUN BIOMATERIALS
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