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High-performance antibacterial long fiber-enhanced polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the direction of coating, can solve the problems of poor thermal stability of polylactic acid, achieve good antibacterial effect, wide material sources, and improve compatibility.

Active Publication Date: 2015-03-04
贵州凯科特材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to: provide a kind of high-performance antibacterial long fiber reinforced polylactic acid composite material and preparation method thereof, it solves the pursuit of high performance such as polylactic acid thermal stability is poor, high strength and high modulus, also solves polylactic acid antibacterial Performance requirements, and one-step preparation of antibacterial long fiber reinforced PLA composites, to overcome the deficiencies of the prior art

Method used

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  • High-performance antibacterial long fiber-enhanced polylactic acid composite material and preparation method thereof
  • High-performance antibacterial long fiber-enhanced polylactic acid composite material and preparation method thereof

Examples

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Embodiment 1

[0015] Example 1 of the present invention: high-performance antibacterial long fiber reinforced polylactic acid composite material, calculated in parts by mass, including 101 parts of polylactic acid, 30 parts of toughening agent, 45 parts of fiber, 8 parts of compatibilizer, and 1 part of chain extender agent, 1 part of antioxidant, 2 parts of lubricant, 1 part of antibacterial agent and 1 part of nano Ag type antibacterial agent; described toughening agent is TPU; described fiber is glass fiber ； The compatibilizer is styrene-acrylonitrile-glycidyl methacrylate ternary random copolymer; the lubricant is calcium stearate; and the antibacterial agent is polyguanidine.

[0016] The preparation method of high-performance antibacterial long fiber reinforced polylactic acid composite material, respectively take 30 parts of polylactic acid, 10 parts of toughening agent and 4 parts of compatibilizer to dry for later use, the drying temperature is 75 ° C, and the drying time is 6 hour...

Embodiment 2

[0017] Example 2 of the present invention: high performance antibacterial long fiber reinforced polylactic acid composite material, calculated in parts by mass, including 90 parts of polylactic acid, 37 parts of toughening agent, 50 parts of fiber, 6 parts of compatibilizer, 1.2 parts of chain extender agent, 1.2 parts of antioxidant, 1 part of lubricant, 1.5 parts of antibacterial agent and 1.5 parts of nano Ag type antibacterial agent; described toughening agent is PBS; described fiber is ramie fiber ； The compatibilizer is styrene-acrylonitrile-glycidyl methacrylate ternary random copolymer; the lubricant is stearic acid; the antibacterial agent is polyguanidine.

[0018] The preparation method of high-performance antibacterial long fiber reinforced polylactic acid composite material, respectively take 25 parts of polylactic acid, 12 parts of toughening agent and 3 parts of compatibilizer to dry for later use, the drying temperature is 60 ° C, and the drying time is 5 hours....

Embodiment 3

[0019] Example 3 of the present invention: high-performance antibacterial long fiber reinforced polylactic acid composite material, calculated in parts by mass, including 110 parts of polylactic acid, 23 parts of toughening agent, 40 parts of fiber, 10 parts of compatibilizer, and 0.8 parts of chain extender Agent, 0.8 part of antioxidant, 3 parts of lubricant, 0.5 part of antibacterial agent and 0.5 part of nano Ag type antibacterial agent; Described toughening agent is PBS; Described fiber is sisal fiber ； The compatibilizer is styrene-acrylonitrile-glycidyl methacrylate ternary random copolymer; the lubricant is polyethylene wax; the antibacterial agent is polyguanidine.

[0020] The preparation method of high-performance antibacterial long fiber reinforced polylactic acid composite material, respectively take 35 parts of polylactic acid, 8 parts of toughening agent and 5 parts of compatibilizer to dry for later use, the drying temperature is 60 ℃, and the drying time is 8 h...

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Abstract

The invention discloses a high-performance antibacterial long fiber-enhanced polylactic acid composite material and a preparation method thereof. According to the preparation method, Polylactic acid is adopted as matrix resin; a chain extender is added to improve the processing temperature of polylactic acid; a ternary random copolymer styrene-acrylonitrile-glycidyl methacrylate is taken as a compatilizer; the compatilizer is used for enhancing the binding force of matrix resin and a fiber, and improving the compatibility between the matrix resin and a flexibilizer; the product is prepared by one step; fiber impregnation of the matrix resin is finished by continuous fibers through a dipping mold; cladding of matrix melt with an antibacterial agent on a dipping material strip is finished in a cladding mold; the cooling and pulling are carried; and finally the material is cut into the required length through a granulator. Compared with the existing two-step method, the method disclosed by the invention is simple in process; and the prepared product is excellent in mechanical property, and has a good antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-performance antibacterial long fiber reinforced polylactic acid composite material and a preparation method thereof. Background technique [0002] Polylactic acid (PLA) is a biodegradable polymer. Due to its abundant sources, low price, and good mechanical properties, more and more experts and scholars are very interested in the research and application of PLA. However, in the process of its degradation, small molecular segments are produced, which are easily used as food by microorganisms such as bacteria, which is conducive to the reproduction of microorganisms such as bacteria. With the enhancement of people's health and hygiene awareness, some polylactic acid products that are in close contact with the human body are required to be antibacterial, such as medical devices, tableware, medicine boxes, bus card holders, toothpick boxes, etc. Therefore, the antiba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L75/04C08L67/02C08L97/02C08L25/14C08L79/00C08K13/04C08K7/14B29B9/06B29B15/14
Inventor 张道海何敏于杰秦舒浩郭建兵瞿进张翔
Owner 贵州凯科特材料有限公司
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