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Light polylactic acid composite material and preparation method thereof

A technology of lightweight materials and composite materials, which is applied in the field of lightweight polylactic acid composite materials and its preparation, can solve the problems of low density, heat-resistant deformation temperature, high density of polylactic acid materials, and low thermal deformation temperature, etc., to achieve density reduction, The effect of good toughness and abundant resources

Active Publication Date: 2013-01-30
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of high density, poor toughness and low thermal deformation temperature of polylactic acid materials, the purpose of the present invention is to provide a polylactic acid composite material with low density, good toughness and high thermal deformation temperature and its preparation method

Method used

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  • Light polylactic acid composite material and preparation method thereof

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Effect test

Embodiment 1

[0032] (1) The hollow glass microspheres were treated with a 0.1% silane coupling agent and dried in an air blast oven at 80°C.

[0033] (2) The polylactic acid and the toughening agent polybutylene succinate were vacuum-dried at 60° C. for 8 hours to remove moisture;

[0034] (3) the dried polylactic acid obtained in step (2) and the toughening agent polybutylene succinate and nano-montmorillonite, antioxidant tetrakis (β-(3,5 di-tert-butyl-4 -Hydroxyphenyl) propionate) pentaerythritol ester, etc. are stirred in a dry high-speed mixer according to a certain weight ratio to make it mix evenly, and then react in a twin-screw extruder, the screw speed is 25rpm, and the extrusion temperature is At 170°C, the hollow glass microspheres are fed into the screw extruder by side feeding, the product is cooled and pelletized, and dried in vacuum to obtain a toughened heat-resistant polylactic acid composite material masterbatch with reduced density; by weight ratio Total: wherein the c...

Embodiment 2

[0036] (1) Treat the phenolic microbeads with a silane coupling agent at a concentration of 0.5% and dry them in an air blast oven at 80°C.

[0037] (2) The polylactic acid and the polybutylene succinate grafted polylactic acid copolymer were vacuum-dried at 70° C. for 5 hours to remove moisture;

[0038] (3) the dried polylactic acid obtained in step (2) and the toughening agent polybutylene succinate grafted polylactic acid copolymer with nano-calcium carbonate, antioxidant (3,5-di-tert-butyl -4-Hydroxyphenyl) octadecyl propionate, etc. are stirred in a dry high-speed mixer according to a certain weight ratio to make it evenly mixed, and then reacted in a twin-screw extruder, the screw speed is 100rpm, extruded The temperature is 180°C, and the phenolic microbeads are fed into the screw extruder by side feeding. The product is cooled, pelletized, and vacuum-dried to obtain a toughened heat-resistant polylactic acid composite material masterbatch with reduced density; by weig...

Embodiment 3

[0040] (1) The hollow glass microspheres were treated with a silane coupling agent at a concentration of 1% and dried in a blast drying oven at 80°C.

[0041] (2) Polylactic acid and ethyl acrylate-butyl acrylate-acrylic acid copolymer were vacuum-dried at 80° C. for 2 hours to remove moisture;

[0042](3) the polylactic acid after the drying that step (2) obtains and toughening agent ethyl acrylate-butyl acrylate-acrylic acid copolymer and nano silicon dioxide, antioxidant β-(3,5-di-tert-butyl -4-Hydroxyphenyl) cyclohexyl propionate, etc. are stirred in a dry high-speed mixer according to a certain weight ratio to make it evenly mixed, and then react in a twin-screw extruder, the screw speed is 180rpm, extruded The temperature is 190°C, and the hollow glass microspheres are fed into the screw extruder by side feeding. The product is cooled, pelletized, and vacuum-dried to obtain a toughened heat-resistant polylactic acid composite masterbatch with reduced density; press In t...

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Abstract

The invention relates to a light polylactic acid composite material and a preparation method thereof. The light polylactic acid composite material is obtained by blending polylactic acid, a flexibilizer, a nano inorganic filler, a light material, an antioxygen and the like and granulating in a double-screw extruder. In the invention, the dried polylactic acid and flexibilizer are blended with the nano inorganic filler, the antioxygen and the like, the mixture is extruded in the double-screw extruder, the light material treated by a coupling agent is filled into the double-screw extruder in a side feeding matter to be mixed and extruded with polylactic acid, and thus the low-density, high-flexibility, high-thermal deformation temperature and biodegradable polylactic acid composite material is obtained.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a lightweight polylactic acid composite material and a preparation method thereof. Background technique [0002] In recent years, with the progress of society, human beings have paid more and more attention to environmental protection. Due to the increasing shortage of natural resources, the rapid growth of the world's population, the predatory exploitation of global resources, and the mass production, consumption, and abandonment of polymer products synthesized from petroleum and other petrochemical resources, environmental protection problems have become increasingly serious. Aware of the importance of environmental protection, people have turned their attention to renewable and environmentally friendly materials. Polylactic acid (PLA) is artificially synthesized from crops such as corn, and can eventually be decomposed into CO in the environment. 2 and H 2 O's the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L61/06C08L67/02C08K9/06C08K7/28C08K3/34C08K3/26C08K3/36
CPCY02P20/582
Inventor 张正光陈效华唐少俊
Owner CHERY AUTOMOBILE CO LTD
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