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Thermoplastic plant fiber/polylactic acid blending material and preparation method thereof

A plant fiber and polylactic acid technology, which is applied in the field of thermoplastic plant fiber/polylactic acid blend materials and their preparation, can solve the problems of insufficient toughness and tear resistance, low elongation at break, and brittle films, etc., and achieve comprehensive mechanics Excellent performance, avoid phase separation, and improve stability

Inactive Publication Date: 2011-08-10
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blending of thermoplastic plant fiber / polylactic acid can improve the processing performance of thermoplastic plant fiber, and at the same time, it can have a better plasticizing effect on polylactic acid, and solve the problem of insufficient processing performance, toughness and tear resistance of polylactic acid, and low elongation at break , brittle film and other problems, provide a new method of producing environmentally friendly plant fiber / polylactic acid thermoplastic material using natural plant fiber as raw material, and serve for the large-scale development and utilization of renewable resource plant fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Take 1 part of thermoplastic plant fiber, 99 parts of poly DL-lactic acid, and 1 part of maleic anhydride in a high-speed mixer for 5 minutes, dry at a temperature of 30°C for 12 hours, and control the temperature at 100°C. The blended material was melt-blended in a twin-screw extruder for 5 minutes, and pelletized at 110° C. and 1 MPa to obtain a fully biodegradable thermoplastic plant fiber / polylactic acid blended material.

Embodiment 2

[0017] Example 2: Take 99 parts of thermoplastic plant fibers, 1 part of poly-L-lactic acid, and 10 parts of dibutyl phthalate in a high-speed mixer and stir for 20 minutes at a temperature of 60 ° C for 8 hours. The blend was melt-blended in a twin-screw extruder at 140°C for 10 minutes, and pelletized at 150°C and 0.1 MPa to obtain a fully biodegradable thermoplastic plant fiber / polylactic acid blend material.

Embodiment 3

[0018] Embodiment 3: Get 10 parts of thermoplastic plant fibers, 90 parts of poly DL-lactic acid copolymers by weight, 3 parts of tributyl citrate and 3 parts of glycerol, 7 parts of Polyethylene Glycol and stir in high-speed mixer 8 Minutes, dry at 40°C for 10 hours, control the temperature at 110°C, blend the melt blended material in a twin-screw extruder for 6 minutes, and granulate at 120°C and 0.7MPa to obtain a completely biodegradable thermoplastic plant fiber / polylactic acid copolymer mix materials.

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PUM

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Abstract

The invention discloses a thermoplastic plant fiber / polylactic acid blending material and a preparation method thereof. The material comprises the following components in parts by weight: 1-99 parts of thermoplastic plant fiber, 1-99 parts of polylactic acid, 0-10 parts of cross-linking agent and 0-10 parts of plasticizer. The preparation method comprises three steps: stirring the raw materials in a high-speed mixer for 5-20 minutes, and then drying the materials at the temperature of 30-60 DEG C for 8-12 hours; controlling the temperature to 100-140 DEG C, and then melt-mixing the mixture ina double-screw extruder for 5-10 minutes; and finally granulating at the temperature of 110-150 DEG C and under the pressure of 0.1-1MPa to obtain the material. The thermoplastic plant fiber / polylactic acid blending material has good processability, excellent thermoplastic processing characteristics and excellent mechanical properties during the process of extrusion molding, blow molding, injection molding and foaming; and the obtained finished product can be completely degradable after being used and is environment-friendly, and can be widely applied to the production and processing fields of chemical industry, mulch, electromechanical industry, building materials, package, environmental protection and the like.

Description

(1) Technical field [0001] The invention relates to a thermoplastic plant fiber / polylactic acid blend material and a preparation method thereof, and belongs to the technical field of compositions containing plant fibers, polylactic acid and blend materials. (2) Background technology [0002] Every year, 150 million tons of limited petrochemical resources such as oil and natural gas are used to chemically synthesize "synthetic polymers". In order to reduce the impact of waste synthetic polymer materials on the environment and the use of limited resources, rebuild a sustainable human Society has become the consensus of countries all over the world. To achieve the sustainable development of the world economy, one of the frontiers of related research at home and abroad is to use clean production technology to modify and synthesize renewable biomass resources into environmentally friendly polymer materials that meet the requirements of use, reducing the impact on limited resource...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L67/04B29B13/06B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C2948/92514B29C2948/92561B29C2948/92895B29C2948/92923
Inventor 罗学刚徐东
Owner SOUTHWEAT UNIV OF SCI & TECH