乙烯基硅氧烷改性壳聚糖/硅杂化膜吸附直接染料性能研究  

Adsorption Performance of Vinyl Siloxane Modified Chitosan/Silica Hybrid Membrane on Direct Dyes

作　　者：何雪梅[1] 吴优 祁珍明[1] 

机构地区：[1]盐城工学院纺织服装学院,江苏盐城224051

出　　处：《纺织科学与工程学报》2018年第1期34-39,共6页Journal of Textile Science & Engineering

基　　金：江苏省科技厅科技支撑计划项目(BY2016065-25);江苏省海洋滩涂生物化学与生物技术重点建设实验室开放项目(K2016-09;224051)

摘　　要：以乙烯基三乙氧基硅氧烷改性的纳米Si O_2为添加剂,通过溶液共混制得壳聚糖/改性纳米Si O_2杂化膜,并对废水中的直接桃红12B和直接耐晒蓝B2RL进行吸附。采用傅立叶红外光谱和热重分析方法对杂化膜的结构及热稳定性进行表征,讨论了温度、p H值、时间等因素对杂化膜吸附直接染料的影响。结果表明:与纯壳聚糖膜相比,杂化膜热稳定性提高;当染料浓度在60mg/L、吸附温度为55℃、p H为8条件下,杂化膜对直接桃红12B和直接耐晒蓝B_2RL有较高吸附量。同时,在此条件下,该杂化膜上,直接染料桃红12B和耐晒蓝B_2RL的吸附行为分别遵循Langmuir和Freundlich等温模型。Using chitosan and nano- SiO2 modified with coupling agent triethoxyvinylsilane, chitosan/modified nano-SiO2 hybrid membrane was prepared and used to adsorb the direct dyes pink 12B and blue B2RL.The hybrid membrane was characterized by FT-IR and thermal analysis methods and the effect of different experi-mental conditions such as temperature, time, and pH on the adsorption Of hybrid membrane was disscussed. Theresults indicated that the hybrid membrane had the better thermal stability, compared with pure chitosan mem-brane. The hybrid membranes have the higher adsorption capacites on direct pink 12B and direct blue B2RL whenthe dyes concentration were 60mg/L, and temperature is 55℃ and pH is 8. Adsorption equilibrium studiesshowed that the adsorption behaviors of hybrid membranes on direct pink 12B and direct blue B2RL followedLangmuir isotherm model and Freundlich isotherm model respectively.

关 键 词：纳米SIO2 壳聚糖 直接染料 吸附 

分 类 号：TS193.2[轻工技术与工程—纺织化学与染整工程]