纤维素基絮凝-脱色复合功能材料制备及其处理染料溶液效果评价  

Synthesis of cellulose-based flocculation and decolorization composite functional material and its performance on dye solution treatment

作　　者：田洋名 姚菊明[1] 张勇[1] 王卫杰 金旭 TIAN Yangming;YAO Juming;ZHANG Yong;WANG Weijie;JIN Xu(College of Materials and Textiles,Silk Institute,ZhejiangSci-TechUniversity,Hangzhou 310018,China)

机构地区：[1]浙江理工大学材料与纺织学院丝绸学院,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2018年第3期284-291,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(61571002;51672251);浙江省公益技术应用研究项目(2017C31034;2015C32098);浙江省公益技术研究项目(GF18C160004)

摘　　要：在聚丙烯酰胺(Polyacrylamide,PAM)改性膨润土(Bentonite)中加入竹浆纤维素(Bamboo pulp cellulose,BPC),通过自由基聚合制备纤维素基絮凝-脱色复合功能材料(BPC-g-PAM-bent),将其应用于染料溶液和实际印染废水的絮凝脱色处理,同时采用傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)、热重分析仪(TGA)和Zeta电位仪等表征BPC-g-PAM-bent产品的结构与性能。结果表明:BPC与PAM的自由基共聚反应引入了酰胺基团(-CONH-),使得PAM通过醚键与纤维素骨架连接;BPC-g-PAM-bent产品在pH 2~12范围内始终呈现出负电性,且负电性随着pH增大而增强。BPC-g-PAM-bent产品的絮凝-脱色效果与改性时间、反应时间、PAM用量、Bentonite用量和引发剂用量有较大关联,优化条件下产品对酸性橙2、碱性红46、活性蓝19染料溶液的去除率分别可达98.5%、99.0%、99.9%,对实际印染废水的色度去除率为97.4%,浊度去除率为98.3%,CODCr去除率为87.1%。Bentonite modified by polyacrylamide(PAM)and bamboo pulp cellulose(BPC)were used to prepare cellulose-based flocculation-decolorization composite functional material(BPC-g-APAM-bent)by free radical polymerization.The composite functional material was applied to flocculation-decolorization treatment of dye solution and the actual dyeing wastewater.The structure and properties of BPC-g-PAM-bent were characterized by Fourier transform infrared spectrometer(FTIR),scanning electron microscopy(SEM),thermogravimetric analyzer(TGA)and Zeta potentiometer.The results show that the PAM is connected with the cellulose backbone by ether bonds due to the introduction of amide group(-CONH-)in free radical copolymerization of BPC with PAM.BPC-g-PAM-bent shows negative charge all the time in the pH range of 2~12,and its negative charge increases with the increase of pH.The flocculation and decolorization performance of BPC-g-PAM-bent is greatly related to modifying time,reaction time,PAM dosage,bentonite dosage and initiator dosage.Under the optimal conditions,the removal rates of Orange II,Basic Red 46 and Reactive Blue 19 can reach 98.5%,99.0%and 99.9%,respectively.The color removal rate,turbidity removal rate and COD Cr removal rate of dyeing wastewater are 97.4%,98.3%and 87.1%,respectively.

关 键 词：竹浆纤维素 膨润土 聚丙烯酰胺 絮凝-脱色 染料溶液 

分 类 号：X52[环境科学与工程—环境工程]