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Method for preparing attapulgite-based pH value response antibacterial material

An antibacterial material, the technology of attapulgite, which is applied in the field of preparation of attapulgite-based pH-responsive antibacterial materials, can solve the problems of strong volatility, pungent odor, and easy oxidation of aldehyde natural antibacterial agents, so as to improve utilization efficiency, Improving palatability, overcoming volatile and pungent strong-odor effects

Active Publication Date: 2020-06-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing attapulgite-based pH-responsive antibacterial materials. On the one hand, it solves the problems of aldehyde natural antibacterial agents, such as easy oxidation, strong volatility, and certain irritating odor. On the other hand, using Chitosan has pH responsiveness, solves the sustained release of aldehyde natural antibacterial agents in the animal intestine, and can be directly used as animal feed for safe animal breeding

Method used

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  • Method for preparing attapulgite-based pH value response antibacterial material
  • Method for preparing attapulgite-based pH value response antibacterial material
  • Method for preparing attapulgite-based pH value response antibacterial material

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Embodiment 1

[0026] Spray 30% citral relative to the mass fraction of attapulgite on the surface of attapulgite under stirring, keep stirring for 30 minutes, then place it in a ball mill for 30 minutes (ball-to-material ratio 1:10); then place it in a stirring tank, Spray chitosan-citric acid aqueous solution (the concentration of chitosan in the system is 5%, and the concentration of citric acid is 2.5%) relative to the mass of attapulgite with 7.5% chitosan. After spraying, keep stirring for 30 minutes, and finally dry the material Dry, sieve, and pack to obtain the antibacterial material. The antibacterial properties of antibacterial materials are shown in Table 1.

Embodiment 2

[0028] Under stirring, spray cinnamaldehyde 25% relative to the mass fraction of attapulgite on the surface of attapulgite, keep stirring for 30 minutes, put it in a ball mill for 40 minutes (ball-to-material ratio 1:10), and then put it in a stirring tank. Spray chitosan-citric acid aqueous solution with 10% chitosan relative to attapulgite mass fraction (chitosan concentration in the system is 7.5%, citric acid concentration is 1%), keep stirring for 45min after spraying, and finally dry the material , sieving, and packaging to obtain the antibacterial material. The antibacterial properties of antibacterial materials are shown in Table 1.

Embodiment 3

[0030] Spray 40% lauryl aldehyde relative to the mass fraction of attapulgite on the surface of attapulgite under stirring, keep stirring for 30 minutes, then put it in a ball mill and grind it for 50 minutes (ball-to-material ratio 1:10), and then put the material in a mixing tank , spray chitosan-citric acid aqueous solution (chitosan concentration 10% and citric acid concentration 2.5% in the system) relative to attapulgite mass of 15% chitosan, keep stirring for 60min after spraying, and finally dry the material , sieving, and packaging to obtain the antibacterial material. The antibacterial properties of antibacterial materials are shown in Table 1.

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Abstract

The invention discloses a method for preparing an attapulgite-based pH value response antibacterial material. The method comprises the following steps: at a stirring state, directly spraying an aldehyde type natural antibacterial agent to the surface of attapulgite powder, further performing grinding in a ball milling, and spraying a chitosan-citric acid aqueous solution into a stirring tank; andperforming continuous stirring for 30-120 minutes after spraying is completed, and drying, screening and packaging the obtained material, so as to obtain the attapulgite-based pH value response antibacterial material. According to the method, aldehyde substances are retained in pores of attapulgite by using a mechanical chemical method, and a chitosan solution is further sprayed to the surface ofthe attapulgite, so that the aldehyde substances can be reacted with chitosan to form Schiff base, and problems that an aldehyde type natural antibacterial agent is easy to volatilize, heavy in irritant smell, and the like, can be overcome; and meanwhile, due to adoption of the chitosan, the antibacterial material is endowed with pH value response, namely under an acid condition, amino of the chitosan is protonized, antibacterial substances are not released, but under neutral and weak alkaline conditions, the Schiff base is hydrolyzed, and the antibacterial substances are continuously released, so that the antibacterial material can replace antibiotics applied to safe breeding of animals.

Description

technical field [0001] The invention relates to a preparation method of an attapulgite-based pH-responsive antibacterial material, which is mainly used to replace antibiotics in the livestock and poultry breeding process, and belongs to the field of nano mineral functional materials and animal feed additives. Background technique [0002] On July 9, 2019, the Ministry of Agriculture and Rural Affairs issued Announcement No. 194, announcing the drug feed additive withdrawal plan and related management policies, and clearly proposing a "comprehensive ban on antibiotics" on July 1, 2020. For this reason, the development of safe and efficient alternative feed antibiotics has become an urgent need for healthy animal farming. [0003] Among many antibiotic replacement products, natural antibacterial agents such as plant extracts have unlimited potential for antibiotic replacement, and are also one of the most commonly used functional additive products for feed antibiotic replaceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K20/28A23K40/30A23K20/105A23K20/163A23K20/111A23K20/121
CPCA23K20/28A23K40/30A23K20/105A23K20/163A23K20/111A23K20/121A23K50/75A23K40/10A01N25/12A01N43/16A01N37/36A01P1/00A01N35/02A01N43/08
Inventor 王爱勤惠爱平杨芳芳康玉茹牟斌汪琴朱永峰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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