化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (12) : 212-217. DOI: 10.19817/j.cnki.issn1006-3536.2023.12.031

科学研究

载Ag白炭黑抗菌剂的制备及性能研究

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Preparation and properties of Ag-loaded silica antibacterial agent

Gao Lingyu¹, Xue Jingyi², Wu Yulou¹, Chen Yingli¹, Yang Xiyun¹

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Received		Published
2022-08-25		2023-12-20
Issue Date	Revised Date
2023-12-27	2022-08-25

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摘要

以AgNO₃为原料,沉淀白炭黑为载体,采用浸渍法制备载Ag白炭黑抗菌剂,以大肠杆菌为例测试了样品的抗菌性能,并对其抗菌过程进行初步分析。利用单因素实验讨论了银离子浓度、反应温度、反应时间和搅拌速度对载Ag白炭黑抗菌率的影响,确定最优制备条件为:银离子浓度0.2mol/L,反应温度80℃,反应时间1.5h,搅拌速度400r/min。在此条件下制备的载Ag白炭黑具有超过99%的抗菌率,银负载量可达3.0%。采用X射线衍射(XRD)、扫描电镜(SEM)、X射线光电子能谱(XPS)和激光粒度仪对载Ag白炭黑的物相结构、形貌特征、化合价和粒度分布进行了表征。结果表明:载银白炭黑为蓬松的、多孔的无定型结构,平均粒径为9.9μm,其中,银以纳米Ag单质的形式存在,均匀负载在二氧化硅表面和孔道上。

Abstract

Using AgNO₃ as raw material and precipitated silica as carrier,Ag-loaded silica antibacterial agent was prepared by impregnation method.The antibacterial properties of the samples were tested by taking Escherichia coli as an example,and the antibacterial process was preliminarily analyzed.The effects of silver ion concentration,reaction temperature,reaction time and stirring speed on the antibacterial rate of Ag-loaded silica were discussed by single factor experiment.The optimal preparation conditions were determined as follows:silver ion concentration of 0.2mol/L,reaction temperature of 80℃,reaction time of 1.5h,and stirring speed of 400r/min.The Ag-loaded silica prepared under these conditions had an antibacterial rate of over 99%,and the silver loading could reach 3.0%.The phase structure,morphology,valence and particle size distribution of Ag-loaded silica were characterized by XRD,SEM,XPS and laser particle size analyzer.The results showed that the silver-loaded silica had a fluffy and porous amorphous structure with an average particle size of 9.9μm.Among them,silver existed in the form of nano-Ag monomer,and was uniformly loaded on the surface and pores of silica.

关键词

白炭黑 / 银 / 抗菌剂 / 制备 / 性能

Key words

silica / silver / antibacterial agent / preparation / property

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载Ag白炭黑抗菌剂的制备及性能研究[J]. 化工新型材料, 2023, 51(12): 212-217 DOI:10.19817/j.cnki.issn1006-3536.2023.12.031

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基金资助

国家自然科学基金(51574286)

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