High temperature resistant and degradable polylactic acid wood plastic material and preparation method thereof

A technology of wood-plastic materials and polylactic acid, which is applied in the fields of biodegradable polymer materials, polymer molding processing, and polymer blending, can solve the problems of low heat resistance, high production cost, and low tear strength, and achieve improved Effects of impact strength, heat resistance improvement, and performance improvement

Inactive Publication Date: 2013-12-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical applications, polylactic acid products are subject to many restrictions due to their high brittleness, low tear strength, high productio...

Method used

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  • High temperature resistant and degradable polylactic acid wood plastic material and preparation method thereof
  • High temperature resistant and degradable polylactic acid wood plastic material and preparation method thereof
  • High temperature resistant and degradable polylactic acid wood plastic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The material provided by the present invention is formed by the proportioning of following raw materials by weight:

[0034]

[0035] First, dry the polylactic acid and PBAT of the above-mentioned raw materials in a vacuum oven at 80°C for 8 hours, and dry the wood powder in a blast drying oven at 100°C for 4 hours; the polylactic acid and PBAT are mechanically mixed according to the proportion, and then sprayed with a coupling agent. Add wood powder and other additives and mix again, so that polylactic acid and PBAT particles can be coated with a layer of wood powder, and then use an extruder to prepare blended masterbatches, set the temperature of the extruder at 160°C-200°C, From the feeding section to the machine head, the temperature is gradually increased, the feeding screw speed is 25rpm, the main screw speed is 60rpm, and the cutting length is 4mm; the masterbatch is then injected into a standard spline by the injection molding machine, and the temperature of ...

Embodiment 2

[0037] The material provided by the present invention is formed by the proportioning of following raw materials by weight:

[0038]

[0039] First, dry the polylactic acid and PPC of the above raw materials in a vacuum oven at 80°C for 8 hours, and dry the bamboo powder in a blast drying oven at 100°C for 4 hours; the polylactic acid and PPC are mechanically mixed according to the proportion, and then sprayed with a coupling agent. Bamboo powder and other additives are added and mixed again, so that polylactic acid and PPC particles can be coated with a layer of bamboo powder, and then the blending masterbatch is prepared using an extruder, and the temperature of the extruder is set at 160°C-200°C from The temperature from the feed section to the machine head is gradually increased, the feed screw speed is 15rpm, the main screw speed is 140rpm, and the cutting length is 2; the masterbatch is then injected into a standard spline by the injection molding machine, and the tempe...

Embodiment 3

[0041] The material provided by the present invention is formed by the proportioning of following raw materials by weight:

[0042]

[0043] First, dry the polylactic acid and PCL of the above raw materials in a vacuum oven at 80°C for 8 hours, and dry the tea leaves in a blast drying oven at 100°C for 4 hours; the polylactic acid and PCL are mechanically mixed according to the proportion, and then sprayed with a coupling agent. After adding tea leaves and other additives, mix again so that polylactic acid and PCL particles can be coated with a layer of tea leaves, and then use an extruder to prepare blended masterbatches. Set the temperature of the extruder at 160°C-200°C. From the feeding section to the machine head, the temperature is gradually increased, the feeding screw speed is 20rpm, the main screw speed is 150rpm, and the cutting length is 2mm; the masterbatch is then injected into a standard spline by the injection molding machine, and the temperature of the injectio...

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Abstract

The invention discloses a high temperature resistant and degradable polylactic acid wood plastic material and a preparation method thereof. The polylactic acid wood plastic material is prepared through the following steps: uniformly mixing the following ingredients by mass: 50%-70% of polylactic acid, 10%-20% of toughening component, 10%-40% of vegetable fiber, and 1%-3% of other auxiliaries, preparing the polyblend master batch through an extruding machine, and preparing polylactic acid wood plastic material through the extruding machine. According to the invention, polylactic acid is used as basal body resin material, flexible and biologically degradable plastic is used as a toughening component, vegetable fiber is used as an intensifier, and a coupling agent, an anti-oxidant, a lubricant and other auxiliaries are added to realize the modification for polylactic acid wood in heat resistance and tenacity; compared with conventional petroleum based macro molecule material, the polylactic acid wood plastic material is environmental-friendly and reproducible; compared with conventional polylactic acid material, the polylactic acid wood plastic material has excellent tenacity and heat resistance.

Description

technical field [0001] The invention relates to a high-temperature-resistant and degradable polylactic acid wood-plastic material and a preparation method thereof, which belong to the field of biodegradable polymer materials, and also belong to the fields of polymer blending and polymer molding processing. Background technique [0002] Polylactic acid is an aliphatic polyester synthesized from renewable resources, and it is also a synthetic polymer biodegradable plastic with more research and better performance. Its excellent properties such as good mechanical properties, transparency, chemical stability, thermoplasticity and biocompatibility make polylactic acid widely used in product agriculture, clothing, medical treatment, packaging and other fields. [0003] In practical applications, polylactic acid products are subject to many restrictions due to their high brittleness, low tear strength, high production cost, low heat resistance, poor hydrophilicity, low softening po...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08L67/02B29C47/92B29B9/06B29C48/92
CPCB29C48/0022B29C48/022B29C48/92B29C2948/9259B29C2948/92638B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92923
Inventor 吴叔青汪昊罗权焜
Owner SOUTH CHINA UNIV OF TECH
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