功能化壳聚糖改性中空介孔SiO_2  

Functionalized chitosan modified hollow mesoporous SiO_2

作　　者：徐广鹏 肖瑶 李苗苗 宫玉梅 张森 郭静 XU Guangpeng;XIAO Yao;LI Miaomiao;GONG Yumei;ZHANG Sen;GUO Jing(School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China;Functional Fiber and its Composite Materials Engineering Technology Research Center of Liaoning Province, Dalian 116034, China)

机构地区：[1]大连工业大学纺织与材料工程学院,大连116034 [2]辽宁省功能纤维及其复合材料工程技术中心,大连116034

出　　处：《复合材料学报》2018年第6期1490-1496,共7页Acta Materiae Compositae Sinica

基　　金：国家留学基金(20163035);辽宁省自然科学基金(2016102048);中国科学院长春应用化学研究所高分子化学与物理国家重点实验室开放课题基金(201513)

摘　　要：以通过溶胶-凝胶法制备的中空介孔SiO_2(HMSiO_2)纳米微球为骨架材料,通过反相微乳液合成使天然高分子壳聚糖(CTS)沉积在HMSiO_2纳米微球表面,随后在铈离子引发下于CTS表面进行丙烯腈接枝共聚并偕胺肟化,制备HMSiO_2复合壳聚糖接枝聚偕胺肟(PAO)复合纳米粒子(HMSiO_2@CTS-g-PAO)。通过FTIR和XRD对HMSiO_2@CTS-g-PAO复合纳米粒子的结构进行表征。采用SEM和激光粒度分析仪对HMSiO_2@CTSg-PAO复合纳米粒子的形貌和粒径进行探究。结果表明:HMSiO_2@CTS-g-PAO复合纳米粒子的内层为HMSiO_2,外层为CTS-g-PAO,是典型的核-壳纳米粒子。以K2Cr2O7为Cr源,探究HMSiO_2@CTS-g-PAO复合纳米粒子对CrⅥ的吸附。结果表明,HMSiO_2@CTS-g-PAO复合粒子对CrⅥ的吸附过程符合伪二级吸附动力学,主要为化学吸附,对pH=2.0、浓度为91.4mg/L的K2Cr2O7溶液中铬的最大吸附量高达3.28mmol/g。A composite nanoparticle hollow mesoporous SiO2（HMSiO2）@chitosan-graft-polyamidoxime（CTS-gPAO）was prepared via HMSiO2 through sol-gel method used as CTS coating on HMSiO2 by inverse microemulsion synthesis used as the matrix to graft polyacrylonitrile（PAN）,which was transformed to PAO.The component and the structure of the HMSiO2@CTS-g-PAO composite were examined by FTIR and XRD.The morphology and the size of the HMSiO2@CTS-g-PAO were confirmed by SEM and Laser Particle Size Analyzer.The results show that the HMSiO2@CTS-g-PAO is core-shell nanoparticle with the HMSiO2 as the core and the CTS-g-PAO as the shell.K2 Cr2 O7 solution is used as the Cr target for detecting the adsorption capacity of the prepared [e-mail] results indicate that the adsorption capacity of Cr VI is 3.28 mmol/g when the pH of K2 Cr2 O7 solution is2 and the concentration of the solution is 91.4 mg/L.Furthermore,the adsorption process is consistent with the pseudo-second-order kinetics and mainly belongs to chemical adsorption.

关 键 词：中空介孔SiO2 壳聚糖 核-壳结构复合材料 聚偕胺肟 Cr吸附 

分 类 号：TB332[一般工业技术—材料科学与工程]