Preparation method of environment-friendly long-acting antibacterial polylactic acid material

An antibacterial polylactic acid and polylactic acid technology is applied in the field of degradable polymer composite materials, which can solve the problems of accelerated degradation rate and insufficient long-term effect, and achieve the effects of producing toxic side effects, high antibacterial efficiency, and no toxic side effects.

Inactive Publication Date: 2015-08-26
JIANGSU SUPLA BIOPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent uses polylactic acid, nano-TiO 2 , coupling agent, antibacterial material prepared by catalyst is characterized in that the degradation rate is accelerated under ultraviolet light irradiation and natural conditions, and it is also insufficient in long-term effect by adding inorganic antibacterial agent

Method used

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  • Preparation method of environment-friendly long-acting antibacterial polylactic acid material

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Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 3.0g PLA in 40ml THF, stir to dissolve, add monomer acrylamide and initiator benzoyl peroxide (BPO) under the protection of nitrogen, continue nitrogen filling for 20min, immerse the reaction bottle in an oil bath, react for 1h, and react After completion, the polymer solution was slowly added dropwise to continuously stirring distilled water to obtain a white fibrous solid product, which was then washed with a large amount of deionized water and ether, and vacuum-dried to a constant weight to obtain a PLA-g-PAM copolymer. Y=(m 1 -m 0 ) / m 0 ×100% to calculate the grafting rate (m 0 is the dry weight of the sample before grafting; m 1 is the dry weight of the sample after grafting), and the grafting rate is 5.8%. Dissolve the copolymer in THF, drop it into a sodium hypochlorite solution with a mass fraction of 0.03%, adjust the pH to 7, and stir the reaction at room temperature for 20 minutes to obtain a halogenated amine compound. The product is washed repe...

Embodiment 2

[0023] Dissolve 3.0g PLA in 40ml THF, stir to dissolve, add monomer N-isopropylacrylamide and initiator BPO under nitrogen protection, continue nitrogen filling for 20min, then immerse the reaction bottle in oil bath, react for 1h, after the reaction is completed , the polymer solution was slowly added dropwise to continuously stirring distilled water to obtain a white fibrous solid product, which was then washed with a large amount of deionized water and ether, and vacuum-dried to a constant weight to obtain a PLA-g-PAM copolymer, by formula Y= (m 1 -m 0 ) / m 0 ×100% to calculate the grafting rate (m 0 is the dry weight of the sample before grafting; m 1 is the dry weight of the sample after grafting), and the grafting rate is 5.2%. Dissolve the copolymer in THF, drop it into a sodium hypochlorite solution with a mass fraction of 0.03%, adjust the pH to 7, and stir the reaction at room temperature for 20 minutes to obtain a halogenated amine compound. The product is washed...

Embodiment 3

[0025] Dissolve 3.0g PLA in 40ml THF, stir to dissolve, add monomer methacrylamide and initiator DCP under nitrogen protection, continue nitrogen filling for 20min, then immerse the reaction bottle in oil bath, react for 1h, after the reaction is completed, polymerize The product solution was slowly added dropwise to constantly stirring distilled water to obtain a white fibrous solid product, which was then washed with a large amount of deionized water and ether, and vacuum-dried to a constant weight to obtain a PLA-g-PAM copolymer. By formula Y=(m 1 -m 0 ) / m 0 ×100% to calculate the grafting rate (m 0 is the dry weight of the sample before grafting; m 1 is the dry weight of the sample after grafting), and the grafting rate is 4.3%. Dissolve the copolymer in THF, drop it into a sodium hypochlorite solution with a mass fraction of 0.03%, adjust the pH to 7, and stir the reaction at room temperature for 20 minutes to obtain a halogenated amine compound. The product is washed ...

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Abstract

The invention provides a preparation method of an environment-friendly long-acting antibacterial polylactic acid material, which comprises the steps that an acrylamide substance is grafted to a polylactic acid molecular chain under an initiator existence condition by a radical graft polymerization method; and then amino is halogenated by a halogenating agent. In bacterium and virus killing processes of a halogen amide compound, an oxidation-state halogen atom is consumed, so that an N-X bond in an halogen amide molecule is converted into an N-H bond and the activity is lost, but the N-H bond can be oxidized into an N-C1 bond after simple rinsing of dilute-concentration bleaching liquid (with an active ingredient of hypochlorite), and a sterilization function is obtained again. Polylactic acid is grafted with acrylamide and then halogenation is performed, so that a product contains a halogen amide group, is high in antibacterial efficiency, is safe to a human body, has no toxic or side effect, is pollution-free, and can be completely applied to a food packing material and tableware.

Description

technical field [0001] The invention belongs to the field of degradable polymer composite materials, in particular to a preparation method of an environment-friendly and long-acting antibacterial polylactic acid material. Background technique [0002] When people realize the existence of environmental problems, they begin to explore the problem of protecting the ecological environment. Polylactic acid (PLA) is a bio-based, new type of biodegradable polymer material chemically synthesized with lactic acid as a monomer. It is non-toxic, non-irritating, good biocompatibility, high strength and biodegradable and absorbable. And other characteristics, do not pollute the environment, is currently the most promising biodegradable polymer materials. The application of polylactic acid is mainly concentrated in the fields of degradable fibers, degradable plastic products, medical materials and so on. At present, the application research and development of polylactic acid as a biodeg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/02C08F220/56C08F220/54C08F8/20
Inventor 张强宋亚男张简邦宏吴中仁
Owner JIANGSU SUPLA BIOPLASTICS CO LTD
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