CN108498807A - X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法 - Google Patents

X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法 Download PDF

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CN108498807A
CN108498807A CN201810168468.XA CN201810168468A CN108498807A CN 108498807 A CN108498807 A CN 108498807A CN 201810168468 A CN201810168468 A CN 201810168468A CN 108498807 A CN108498807 A CN 108498807A
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molecular sieve
type molecular
chitosan
potassium diformate
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陈南春
胡月
解庆林
王秀丽
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Guilin University of Technology
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Abstract

本发明公开了一种X型分子筛‑壳聚糖‑二甲酸钾缓释抗菌剂的制备方法。用辉沸石为原料制备X型分子筛,壳聚糖长链中氨基上的氢分别同二甲酸钾和分子筛中的氧形成氢键,在连接二甲酸钾和分子筛;分子筛中的游离羟基氢同壳聚糖C‑O中的氧形成氢键,同二甲酸钾C=O中的氧可能形成氢键。形成良好复配效应,从而制得具缓释效应的抗菌剂。本发明方法所用辉沸石资源主要分布在广西,有良好开发利用前景,通过合理开发,充分利用结构特点,制备不同类型分子筛、选择吸附接枝不同类型的抗菌剂,可使抗菌剂抑菌标准用于实际生产作业,且制得的缓释抗菌剂的抗菌性高,抑菌率在78.1~81.3%。

Description

X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法
技术领域
本发明属于抗菌剂制备技术领域,特别涉及了一种X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法。
背景技术
广西辉沸石是一种廉价、易得的原料,经酸化后可作为合成分子筛的原料,本方法以酸化辉沸石为原料,通过水热合成法,控制反应时间和反应温度等条件制备X型分子筛。以X型分子筛为载体,壳聚糖为中间体,通过水热合成法制备X型分子筛缓释抗菌剂。
二甲酸钾作为一种高效环保的抗菌剂,能够抑制动物肠道中大肠杆菌的生长,但是其在肠胃中分解较快,无法达到肠道末段,无法在肠道末段发挥作用,为解决这一问题,我们选择X型分子筛作为二甲酸钾的载体,以期能达到缓释的作用,但X型分子筛只能与二甲酸钾产生吸附作用,缓释抑菌效果不好,而壳聚糖是一种绿色、无毒、无害的高分子材料,含有氨基和大量的羟基,有较高的表面活性和生物活性,同时具有一定的抑菌性能,已被我国批准作为食品添加剂使用,可以利用壳聚糖分子中大量的羟基,分别同分子筛和二甲酸钾之间形成氢键,使二甲酸钾固定到分子筛上,实现二甲酸钾在肠道中缓释抑菌的目的。
发明内容
本发明的目的是提供一种X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法。
本发明思路:用辉沸石为原料制备X型分子筛,壳聚糖长链中氨基上的氢分别同二甲酸钾和分子筛中的氧形成氢键,在连接二甲酸钾和分子筛;分子筛中的游离羟基氢同壳聚糖C-O中的氧形成氢键,同二甲酸钾C=O中的氧可能形成氢键。形成良好复配效应,从而制得具缓释效应的抗菌剂。
具体步骤为:
(1)将辉沸石粉碎至190~210目,以质量百分比浓度为12~15%的盐酸与辉沸石按液固比为3:1进行混合,在85~90 ℃下搅拌2~2.5 h,制得前驱体。
(2)以步骤(1)制得的前躯体中的硅/铝的摩尔比进行制备X型分子筛的物相配比,其中,SiO2与Al2O3的摩尔比为3~3.1:1,Na2O与SiO2的摩尔比为1.14~1.13:1,H2O与Na2O的摩尔比为36~37:1,然后在95~97℃下晶化反应7~7.5h,制得X型分子筛。
(3)按照步骤(2)制得的X型分子筛:壳聚糖:二甲酸钾的质量比为3:1:2配料,然后在38~40℃下反应2~2.2h,即制得X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂。
本发明方法所用辉沸石资源主要分布在广西,有良好开发利用前景,通过合理开发,充分利用结构特点,制备不同类型分子筛、选择吸附接枝不同类型的抗菌剂,可使抗菌剂抑菌标准用于实际生产作业,且制得的缓释抗菌剂的抗菌性高,抑菌率在78.1~81.3%。
附图说明
图1为本发明实施例中制得的X型分子筛的衍射图谱。
图2为本发明实施例中使用的二甲酸钾的结构式。
图3为本发明实施例中使用的壳聚糖的结构式。
图4为本发明实施例中X型分子筛-壳聚糖-二甲酸钾的复配结构图。
图5为本发明实施例制得的X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的衍射图谱。
图6为本发明实施例制得的X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的SEM图。
具体实施方式
实施例:
利用X型分子筛八面体笼的结构特征,表面活性羟基等特点,与可以发生水解、羧甲基化、氧化、还原、缩合和络合等化学反应的壳聚糖,以及具良好生物相溶性的二甲酸钾进行有效复配,可达到针对牲畜肠道肠致病性大肠杆菌(EPEC)、肠产毒性大肠杆菌(ETEC)、肠侵袭性大肠杆菌(EIEC)、肠出血性大肠杆菌(EHEC)、肠黏附性大肠杆菌(EAEC)和弥散粘附性大肠杆菌(DAEC)等良好抑制作用,控制肠道PH值。
以天然辉沸石为原材料,通过水热合成法制备X型分子筛,并以壳聚糖为中间体,X型分子筛为载体接枝二甲酸钾,制备X型分子筛缓释抗菌剂,通过体外抗菌实验对其进行抗菌测试,解决二甲酸钾在动物肠胃中分解较快,无法达到肠胃末段的问题。
将辉沸石粉碎至200目左右,用质量百分比浓度为15%的盐酸与辉沸石按液固比为3:1进行混合,在90 ℃条件下搅拌2 h。可以破坏辉沸石的结构形成部分非晶态物质,并且可以除去无用的矿物杂质,酸化后制得前驱体;以制得的前躯体中的硅/铝的摩尔比进行制备X型分子筛的物相配比,其中,SiO2与Al2O3的摩尔比为3:1,Na2O与SiO2的摩尔比为1.14:1,H2O与Na2O的摩尔比为37:1,在温度为97℃,晶化7h,制备出X型分子筛;以X型分子筛:壳聚糖:二甲酸钾的质量比=2:1:3配料,反应时间为2h,反应温度为40℃,即制得X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂。
对本实施例制得的X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂通过平板计数法进行体外抗菌实验,其对大肠杆菌的抑菌率为79.16%;体外测试24h后其仍有抑菌效果,且检测添加X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂后的pH为弱酸性,能够降低动物肠道pH值,改善肠道环境,更有利于抑制有害细菌生长,促进有益细菌生长。

Claims (1)

1.一种X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法,其特征在于具体步骤为:
(1)将辉沸石粉碎至190~210目,以质量百分比浓度为12~15%的盐酸与辉沸石按液固比为3:1进行混合,在85~90 ℃下搅拌2~2.5 h,制得前驱体;
(2)以步骤(1)制得的前躯体中的硅/铝的摩尔比进行制备X型分子筛的物相配比,其中,SiO2与Al2O3的摩尔比为3~3.1:1,Na2O与SiO2的摩尔比为1.14~1.13:1,H2O与Na2O的摩尔比为36~37:1,然后在95~97℃下晶化反应7~7.5h,制得X型分子筛;
(3)按照步骤(2)制得的X型分子筛:壳聚糖:二甲酸钾的质量比为3:1:2配料,然后在38~40℃下反应2~2.2h,即制得X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂。
CN201810168468.XA 2018-02-28 2018-02-28 X型分子筛-壳聚糖-二甲酸钾缓释抗菌剂的制备方法 Pending CN108498807A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109731103A (zh) * 2019-01-20 2019-05-10 桂林理工大学 P型分子筛-壳聚糖-海藻酸钠-二甲酸钾缓释抗菌剂的制备方法
CN111961272A (zh) * 2020-07-07 2020-11-20 任丘市华凯通信设备有限公司 一种耐腐蚀阻燃硅芯管材及其制备方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109731103A (zh) * 2019-01-20 2019-05-10 桂林理工大学 P型分子筛-壳聚糖-海藻酸钠-二甲酸钾缓释抗菌剂的制备方法
CN111961272A (zh) * 2020-07-07 2020-11-20 任丘市华凯通信设备有限公司 一种耐腐蚀阻燃硅芯管材及其制备方法
CN111961272B (zh) * 2020-07-07 2023-01-31 任丘市华凯通信设备有限公司 一种耐腐蚀阻燃硅芯管材及其制备方法

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