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海泡石改性及吸附Zn2+研究

         

摘要

The inorganic anti-bacterial material of metal ions type is characterized by high security, great antibacterial capability, wide working temperature range and heat-enduring properties, and hence it is used in many fields with extensive application value. It consists of two parts, I. E., anti-bacterial metal ions and inorganic carrier materials, and its anti-bacterial properties bear a relationship with the adsorption capacity of metal ions on the carrier material. This paper made a tentative study of two different processes, I.e., the acid modification of sepiolite and sepiolite loading anti-bacterial Zn2 + , observing the influences of these two means on the structure of sepiolite and the amount of Zn2+ . AAS, XRD, SEM/EDX, FT-IR were used to characterize the Zn2+-loading sepiolite, The results show that the utilization of 5% HC1 at the temperature of 70℃ to treat sepiolite is a very necessary and effective means for improving the purity, scattering fiber bundles and expanding the pore space of sepiolite so as to increase the capacity of Zn2+ -loading. Dry wet cycle way could be employed to enhance the capacity of loading Zn2+, but its complex operation and greater energy consumption hinder it from further use. Therefore, an appropriate choice is necessary.%金属离子型无机抗菌剂具有安全性好、抗菌广谱、时效长和耐热等许多优良性能,在许多领域有广泛的应用价值.金属离子型无机抗菌剂由金属抗菌离子和无机载体材料组成,其抗菌性能与载体材料对抗菌金属离子的吸附量有关.本文初步研究了对海泡石进行酸改性及用海泡石载抗菌锌离子(Zn 2+)的两种工艺方式对海泡石结构及载Zn2+量的影响.通过原子吸收发射光谱、X射线衍射、扫描能谱电子显微镜及傅立叶变换红外光谱等技术的分析表明,用体积浓度为5%的HCL,在70℃温度下对海泡石进行酸处理,在提高海泡石纯度,分散海泡石纤维束、使海泡石结构中孔隙扩大,进而达到更多载入Zn2+目的等方面都是十分必要和有效的方法;采用干湿循环方式将Zn2+载于海泡石能提高海泡石的载Zn2+量,但干湿循环方式操作更复杂,能耗更大,应视具体情况酌情选择使用.

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