Completely biodegradable bamboo microstructure unit and polylactic acid biomass composite and preparation method thereof

A technology of structural units and composite materials, which is applied in the field of bamboo microstructural units and polylactic acid biomass composite materials and their manufacturing, can solve the problems of polymer material use restrictions, poor heat resistance, large usage, etc., and achieve good mechanical processing The effect of performance, simple equipment and low cost

Inactive Publication Date: 2010-12-08
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, biodegradable plastics such as polylactic acid, like other polymer materials, have poor heat resistance, and the elastic modulus of the material decreases significantly with the increase of temperature, so the use of polymer materials is limited
[0004] For some short-cycle products (such

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Embodiment 1: Bamboo shavings are used for the bamboo miniature material.

[0038] The manufacture method steps of the fully degradable bamboo fiber and the polylactic acid biomass composite material of high bamboo material content of the present invention are as follows:

[0039] (1) Prepare bamboo shavings: bamboo or bamboo processing residues are made into bamboo chips with a length of 2 cm to 6 cm and a width of 1 cm to 5 cm. The bamboo chips are prepared by a flaking machine to produce bamboo shavings, which are then dried and set aside.

[0040] (2) Composite material mixing preparation: after the bamboo shavings obtained in step 1 and polylactic acid plastics (usually pellets) are weighed in a ratio of 60:40 by weight percentage, join in a kind of multi-blade high-speed mixer with 1200rpm Mix at a high speed at the above speed until the polylactic acid pellets are completely melted (the temperature reaches 175°C), and are evenly mixed with the bamboo shavings.

...

Example Embodiment

[0043] Embodiment 2: Bamboo miniature material adopts bamboo shavings

[0044] The steps of the method are the same as those in Example 1, except that in step 2, according to the performance requirements of the product, bamboo shavings and polylactic acid plastics are mixed in a ratio of 65:35 by weight to form a composite material mixture.

Example Embodiment

[0045] Embodiment 3: Bamboo miniature material adopts bamboo shavings

[0046] The steps of the method are the same as those in Example 1, except that in step (2) according to the performance requirements of the product, bamboo shavings and polylactic acid plastics are mixed in a ratio of 70:30 by weight to form a composite material mixture.

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PUM

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Abstract

The invention relates to a completely biodegradable bamboo microstructure unit and polylactic acid biomass composite which is a biomass composite with high content of bamboo material which is prepared by using bamboo material and biodegradable polylactic acid as raw materials and adopting high-speed mixing method. The preparation method comprises the following steps: chipping or cutting bamboo material or bamboo material processing residues in other modes to prepare bamboo chips or bamboo sections; performing flaking separation, fiber pulping or other technologies to bamboo chips or bamboo sections to prepare bamboo microstructure units; weighting bamboo microstructure units and polylactic acid in a weight ratio of 60:40 to 90:10; then performing high-speed mixing in a high-speed mixer to heat materials through friction heating and external heating, mixing with bamboo microstructure units evenly; and using the prepared mixture of bamboo microstructure units and polylactic acid to prepare various high-intensity board or moulded products under the hot pressing technological conditions that the temperature is 150-200 DEG C, the pressure is 1-6MPa and the time is 5-30min.

Description

technical field [0001] The invention relates to a fully degradable bamboo microstructure unit and polylactic acid biomass composite material with high bamboo content and a manufacturing method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection, more and more attention has been paid to the pollution and burden on the environment caused by the non-degradable plastics that are currently widely used. It has become an inevitable trend in the field of materials science to replace various non-degradable materials with completely biodegradable (or naturally) degradable materials. [0003] Polylactic acid plastic is derived from plant resources. It has good biocompatibility, degradability and good machinability. It is an eco-friendly high molecular weight material with low energy consumption. At present, large-scale production has been realized in the United States and other places. The application of this type of material ...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L67/04B29C43/58
Inventor 郭文静王正常亮余雁任一萍高黎
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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