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A kind of polylactic acid Pdlla sustained-release antibacterial agent and its preparation method and application

The technology of an antibacterial agent and polylactic acid is applied in the field of polylactic acid PDLLA slow-release antibacterial agent and its preparation, which can solve the problems of ineffectiveness of the antibacterial function of the coating, easy poisoning by contact, high toxicity and the like, and achieves the effect of a simple preparation method and easy operation.

Active Publication Date: 2022-04-01
广东施彩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method, on the one hand, the antibacterial agent dissolves quickly, is highly toxic, and is easy to be poisoned by contact, or easily enters the air, causing pollution; on the other hand, the antibacterial agent passes quickly, and the antibacterial function of the coating fails quickly

Method used

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  • A kind of polylactic acid Pdlla sustained-release antibacterial agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 10 parts by weight of 2-octyl-4-isothiazolin-3-one in 90 parts by weight of ethyl acetate to prepare an antibacterial agent solution, add 10 parts by weight of porous molecular sieves, magnetically stir for 30min, and turn to vacuum In the oven, reduce the air pressure of the vacuum box to below 0.1MPa, take it out after standing for 30min, centrifuge to separate the precipitate, put it in a 60°C oven and dry it for 12h, repeat the above steps 3 times to obtain saturated filled 2-octyl- 4-isothiazolin-3-one@porous molecular sieve;

[0024] 10 parts by weight of 2-octyl-4-isothiazolin-3-one@porous molecular sieve, 30 parts by weight of ethyl acetate, 50 parts by weight of DL-lactic acid and 0.6 parts by weight of tin powder were added to the reaction flask, Azeotropic reflux at 100° C. for 30 h, and then the solvent was removed by rotary evaporation, and vacuum-dried at 60° C. for 20 h to obtain polylactic acid PDLLA slow-release antibacterial agent.

Embodiment 2

[0026] Dissolve 20 parts by weight of carbendazim in 90 parts by weight of ethyl acetate to prepare an antibacterial solution, add 15 parts by weight of a metal-organic framework compound, stir magnetically for 60 minutes, transfer to a vacuum box, and drop the vacuum box pressure To below 0.1MPa, take it out after standing for 30min, centrifuge to separate the precipitate, put it in an oven at 80°C and dry it for 6h, repeat the above steps 3 times to get saturated filled carbendazim@metal-organic framework;

[0027] Add 10 parts by weight of carbendazim@metal-organic framework compound, 30 parts by weight of ethyl lactate, 50 parts by weight of DL-lactic acid and 0.6 parts by weight of tin chloride into the reaction flask, and azeotropically reflux at 70°C for 40 hours , and then the solvent was removed by rotary evaporation, and vacuum-dried at 60° C. for 20 h to obtain the polylactic acid PDLLA slow-release antibacterial agent.

Embodiment 3

[0029] 12 parts by weight of pyrithione are zinc-dissolved in 90 parts by weight of ethyl acetate to prepare an antibacterial agent solution, add 8 parts by weight of porous activated carbon, stir magnetically for 30 minutes, transfer to a vacuum box, and reduce the air pressure of the vacuum box to 0.1 Below MPa, take it out after standing for 30 minutes, centrifuge to separate the precipitate, put it in a 60°C oven and dry it for 12 hours, repeat the above steps 3 times to obtain saturated filled zinc pyrithione@porous activated carbon;

[0030] Add 15 parts by weight of zinc pyrithione@porous activated carbon, 30 parts by weight of dichloromethane, 50 parts by weight of DL-lactic acid, and 0.4 parts by weight of p-dimethylaminopyridine into the reaction flask, and azeotrope at 150 ° C Reflux for 20 hours, then remove the solvent by rotary evaporation, and dry in vacuum at 60° C. for 20 hours to obtain the polylactic acid PDLLA slow-release antibacterial agent.

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Abstract

The invention discloses a polylactic acid PDLLA slow-release antibacterial agent and its preparation method and application. The cage-like substance is used as a carrier, and the antibacterial agent is filled with low-pressure adsorption, and then DL-lactic acid is polymerized to close the outlet of the cage-like substance to obtain a slow-release polylactic acid PDLLA. Antibacterial agents. The invention utilizes the degradable property of polylactic acid to effectively control the opening of the outlet of the cage-like carrier material, so that the antibacterial agent adsorbed in the cage-like carrier can be released quantitatively, thereby achieving the purpose of preparing a low-toxicity and long-acting antibacterial agent. The preparation method of the invention is simple and easy to operate. The polylactic acid PDLLA slow-release antibacterial agent is applied in the tree protective paint, has low toxicity and long-term antibacterial effect, and is beneficial to the healthy growth of trees and beautifies the environment.

Description

technical field [0001] The invention relates to the field of antibacterial technology, in particular to a polylactic acid PDLLA slow-release antibacterial agent and its preparation method and application. Background technique [0002] With the acceleration of urban modernization, the proportion of reinforced concrete structures in our cities is increasing, and the urban "heat island effect" is becoming more and more serious. In order to make the city develop healthily, urban landscaping has attracted more and more attention. Trees occupy a large proportion in landscaping. Insect-proof treatment is required in the cultivation and maintenance of seedlings, and pruning is often required during the growth of trees. After pruning or sawing, improper wound treatment will not only fail to heal, but also the cortical cells and xylem cells of the wound will gradually die, and germs are easy to invade. Weakness and even death. [0003] Most of the current anti-insect and anti-bacter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/14C08G63/08
CPCC09D5/14C08G63/08
Inventor 叶邦君谢冠群王小霞钟小秋
Owner 广东施彩新材料科技有限公司
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