氧化石墨烯改性粘胶纤维复合材料的制备及对水中甲基橙的吸附性能研究  

Preparation of graphene oxide modified viscose fiber composite material and its adsorption performance for methyl orange in water

作　　者：张春晓 宋超 沙宝鑫 宋菲阳 ZHANG Chun-xiao;SONG Chao;SHABao-xin;SONG Fei-yang(Shandong Institute of Petroleum and Chemical Technology,Dongying 257061,China)

机构地区：[1]山东石油化工学院,山东东营257061

出　　处：《化学研究与应用》2023年第4期884-891,共8页Chemical Research and Application

基　　金：东营市科学发展基金项目(DJ2020026)资助。

摘　　要：以粘胶纤维(VF)为原料,氢氧化钠为催化剂,氯乙酸钠为改性剂,对粘胶纤维进行羧甲基改性,制备了改性阴离子粘胶纤维(AVF)。以阴离子粘胶纤维为原料,聚乙烯亚胺为交联剂,氧化石墨烯(GO)为改性剂,采用高压反应釜在高温条件下制备了氧化石墨烯改性粘胶纤维复合材料(VF-g-GO),并通过IR、SEM、XPS对产品进行表征,证明VF-g-GO制备成功。三因素三水平正交实验结果表明:VF-g-GO的最佳合成条件是反应温度140℃、聚乙烯亚胺添加量3g、氧化石墨烯添加量0.25g。吸附实验结果表明:VF-g-GO对甲基橙的吸附量随溶液浓度的增加而增大,VF-g-GO在2.0×10^(-4)mol/L的甲基橙溶液中达到饱和吸附量87mg/g。同时VF-g-GO具有pH敏感性,经过pH=5盐酸溶液酸化处理的VF-g-GO对甲基橙的吸附量明显高于未经盐酸处理的VF-g-GO的吸附量。吸附动力学和吸附等温线实验表明:VF-g-GO对甲基橙的吸附符合准二级动力学方程,Freundlich吸附模型更能解释VF-g-GO对甲基橙的吸附作用。Modified anionic viscose fiber(AVF)was prepared by carboxymethyl modification of viscose fiber(VF)with sodium hydroxide(NaOH)as catalyst and sodium chloroacetate(ClCH2COONa)as modifier.Using modified anionic viscose fiber as raw material,polyethyleneimine(PEI)as crosslinking agent and graphene oxide(GO)as modifier,Graphene Oxide Modified Viscose Fiber Composites(VF-g-GO)was prepared by high pressure reaction kettle at high temperature.The product was characterized by IR,XPS and SEM,which proved that VF-g-GO was successfully prepared.Three factors and three levels orthogonal experiment results showed that the optimum synthesis conditions of VF-g-GOwere reaction temperature 140°C,polyethyleneimine(PEI)dosage 3g,graphene oxide(GO)dosage 0.25g.The adsorption experiment results showed that the adsorption capacity of VF-g-GO on methyl orange increased with the increase of solution concentration,and the saturated adsorption capacity of VF-g-GO reached 87mg/g in 2.0×10^(-4)mol/L methyl orange solution.At the same time,VF-g-GO had pH sensitivity.The adsorption capacity of methyl orange on VF-g-GO acidified by pH=5 hydrochloric acid solution was significantly higher than that of VF-g-GO without hydrochloric acid treatment.Adsorption kinetics and adsorption isotherm experiments showed that the adsorption of methyl orange by VF-g-GO conformed topseudo-second-order kinetic equation,and Freundlich adsorption model could better explain the adsorption of methyl orange by VF-g-GO.

关 键 词：粘胶纤维 氧化石墨烯 改性 吸附 

分 类 号：O636.11[理学—高分子化学]