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Method for preparing biomass base polylactic acid composite material

A technology based on polylactic acid and composite materials, which is applied in the field of preparation of biomass-based polylactic acid composite materials, can solve the problems of unacceptable price and poor impact performance, and achieve the effects of good market prospects, cost reduction and impact strength improvement.

Inactive Publication Date: 2011-04-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, polylactic acid is used as a general-purpose plastic, and its price is still difficult to be accepted by the market. Moreover, polylactic acid products also have the disadvantage of poor impact performance.

Method used

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  • Method for preparing biomass base polylactic acid composite material
  • Method for preparing biomass base polylactic acid composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Get 192g of polylactic acid, vacuum-dry at 80 DEG C for 12 hours; get 48g of 80 mesh wood flour, vacuum-dry at 100 DEG C for 12 hours, get 2.4g of silane coupling agent KH-550, mix it with 24g of glycidyl methacrylate ( After GMA) grafted ethylene-1-octene copolymer (POE) was mixed evenly, melt blending was carried out with a HAKKE internal mixer, the blending temperature was 180°C, the rotating speed was 60rpm, and the blending time was 10 minutes to obtain a composite material . Its performance is shown in Table 1.

Embodiment 2

[0035] Get 192g of polylactic acid, vacuum-dry at 80°C for 12 hours; get 48g of 80-mesh wood powder, and vacuum-dry at 100°C for 48 hours, take the antioxidant tetrakis[methylene β-(3,5-di-tert-butyl-4- Hydroxyphenyl) propionic acid] pentaerythritol ester 2.4g, get 2.4g silane coupling agent KH-550, mix it with 48g glycidyl methacrylate (GMA) graft ethylene-1-octene copolymer (POE) After homogenization, the HAKKE internal mixer is used for melt blending, the blending temperature is 180° C., the rotation speed is 60 rpm, and the blending time is 10 minutes to obtain a composite material. Its performance is shown in Table 1.

[0036] Table 1 Properties of polylactic acid / wood flour composites

[0037]

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Abstract

The invention discloses a method for preparing a high-hardness high-toughness biomass base polylactic acid composite material, which is characterized in that polylactic acid and wood flour are used asa main body which is added with proper amount of a toughening agent and other auxiliary agents to form the composite material. The prepared composite material has high hardness, and the flexural modulus can be over 5,000 MPa; the bending strength can be over 80 MPa; the shock resistance is good, and the impact strength (with a gap) of a simply supported beam can be over 9 kJ / m<2>; and the tensilestrength can be over 40 MPa, and the elongation at break can be over 30 percent. The method can greatly reduce the cost of the polylactic acid composite material; and simultaneously, the obtained composite material has degradability, thus the composite material has good value of environmental protection.

Description

technical field [0001] The invention relates to a preparation method of a biomass-based polylactic acid composite material with high hardness and high toughness, in particular to a preparation method of a composite material formed of polylactic acid as the main body, adding other additives, wood powder and toughening agent . Background technique [0002] The resource crisis and ecological problems have triggered a global upsurge in the study of sustainable development and protection of the ecological environment. Many new materials that meet environmental protection requirements are emerging, and wood-plastic composites are a new type of material with great development potential. In recent years, the production of wood-plastic composite materials has developed rapidly, and its products have gradually been widely used in the fields of packing boxes, container appliances, guardrails, furniture, automobile pillars and seats. Polylactic acid has attracted great attention due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L97/02C08L51/06
Inventor 郭卫红李冰董蓉高磊杨俊施庆锋吴驰飞汪济奎
Owner EAST CHINA UNIV OF SCI & TECH
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