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A preparation method of composite high-strength polylactic acid gradient membrane material

A technology of polylactic acid and gradient film, which is applied in the direction of coating, etc., can solve the problems of poor biodegradability, etc., and achieve the effect of large cross-linking degree, increased hydrophobicity, and stronger impact strength

Active Publication Date: 2021-07-13
大川(清新)塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problem of poor biodegradability of existing polylactic acid materials, a preparation method of a composite high-strength polylactic acid gradient membrane material is provided

Method used

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  • A preparation method of composite high-strength polylactic acid gradient membrane material

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example 1

[0027]Add phosphogypsum whiskers and talc powder to the silane coupling agent, stir and mix, and place in a high-speed mixer for stirring and blending treatment. After blending for 25 minutes, let it stand to cool to room temperature, filter and collect the filter residue, and dry at 55°C After 6 hours, grind through a 200-mesh sieve to obtain inorganic reinforced particles; weigh xylitol, sebacic acid, glutamic acid and polycaprolactone respectively and place them in a three-necked flask, stir and mix and heat in an oil bath until the materials are melted Finally, pass nitrogen to remove the air, keep warm for 3 hours, let stand and cool to room temperature, collect the polymer and pour it into the mold, crosslink the reaction for 3 hours, and collect the crosslinked elastomer material; weigh 45 parts by weight Put epoxy silicone oil, 10 parts of toluene diisocyanate and 10 parts of cross-linked elastomer in a three-necked flask, stir and mix and keep warm for reaction, collec...

example 2

[0029] Add phosphogypsum whiskers and talc powder to the silane coupling agent, stir and mix, and place in a high-speed mixer for stirring and blending treatment. After blending for 26 minutes, let it stand and cool to room temperature, filter and collect the filter residue, and dry at 57°C After 7 hours, grind through a 200-mesh sieve to obtain inorganic reinforced particles; weigh xylitol, sebacic acid, glutamic acid and polycaprolactone respectively and place them in a three-necked flask, stir and mix and heat in an oil bath until the materials are melted Afterwards, ventilate nitrogen to remove the air, keep warm for 4 hours, let stand and cool to room temperature, collect the polymer and pour it into a mold, cross-link for 4 hours, and collect the cross-linked elastomer material; weigh 46 parts by weight Put epoxy silicone oil, 11 parts of toluene diisocyanate and 11 parts of cross-linked elastomer in a three-necked flask, stir and mix and keep warm for reaction, collect t...

example 3

[0031] Add phosphogypsum whiskers and talc powder to the silane coupling agent, stir and mix, and place in a high-speed mixer for stirring and blending treatment. After blending for 27 minutes, let it stand to cool to room temperature, filter and collect the filter residue, and dry at 59°C After 7 hours, grind through a 200-mesh sieve to obtain inorganic reinforced particles; weigh xylitol, sebacic acid, glutamic acid and polycaprolactone respectively and place them in a three-necked flask, stir and mix and heat in an oil bath until the materials are melted Finally, pass nitrogen to remove the air, keep warm for 4 hours, let it stand and cool to room temperature, collect the polymer and pour it into the mold, cross-linking reaction for 4 hours, and collect the cross-linked elastomer material; weigh 47 parts by weight Put epoxy silicone oil, 12 parts of toluene diisocyanate and 12 parts of cross-linked elastomer in a three-necked flask, stir and mix and keep warm for reaction, c...

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Abstract

The invention relates to a preparation method of a composite high-strength polylactic acid gradient membrane material, belonging to the technical field of gradient materials. The technical scheme of the present invention adopts xylitol and sebacic acid as raw materials to prepare elastomeric materials as modified materials. Since there are multiple methylene groups in the sebacic acid chain segment, it is easy to form a crystal structure, so its crystallinity is large and the elastomeric The strength is high, the degree of crosslinking of the elastomer is large, and its tensile strength is high; the present invention uses compound amino acids for modification treatment, and the tensile strength of the amino acid bioelastomer is affected by the crosslinking density and crystallinity. When a certain synergistic effect is achieved, the material will have higher mechanical strength. The elastomer is added during the casting film forming process to form an effective network structure inside the casting film material. Through the configuration of the three-dimensional network structure, Effectively improve the bonding performance of the material, the cast film material can effectively penetrate and entangle, forming a better elastic structure, so that the elastic strength of the material has an excellent level.

Description

technical field [0001] The invention relates to a preparation method of a composite high-strength polylactic acid gradient membrane material, belonging to the technical field of gradient materials. Background technique [0002] Gradient functional material is a new type of composite material, which is generally composed of two or more materials. During the preparation process, the elements such as composition, structure and porosity are continuously changed in a certain direction of the material, so that A heterogeneous composite material that continuously changes the performance and function of the material to adapt to different environments and achieve a certain special function. It has better physical, chemical and mechanical properties than traditional composite materials. The characteristic of this type of material is that the continuous change of material composition or other elements makes its structure also change continuously, and there is no obvious interface insid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L75/06C08K9/06C08K7/08C08K3/34C08J3/24C08J5/18C08J7/04C08G18/61C08G18/76C08G18/42
CPCC08J5/18C08J3/24C08G18/61C08G18/7614C08G18/4277C08J2367/04C08J2467/04C08J2475/06C08K9/06C08K7/08C08K3/34C08J7/0427
Inventor 宁夏
Owner 大川(清新)塑料制品有限公司
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