棉秆皮微晶纤维素/改性壳聚糖吸附纤维制备与性能  

Preparation and properties of adsorption fiber made from cotton stalk bark microcrystalline cellulose/modified chitosan

作　　者：邵彦峥 孙将皓 魏春艳 吕丽华 SHAO Yanzheng;SUN Jianghao;WEI Chunyan;LU Lihua(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian,Liaoning 116034,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《纺织学报》2023年第8期18-25,共8页Journal of Textile Research

基　　金：辽宁省自然科学基金指导计划项目(2019-ZD-0295)。

摘　　要：为提高壳聚糖(CS)对阴离子染料刚果红的吸附性能,以尿素溶剂法低温溶解棉秆皮微晶纤维素(MCC)作为纺丝基体,以改性壳聚糖为分散吸附材料,经湿法纺丝和冷冻干燥制备棉秆皮微晶纤维素/改性壳聚糖(MCC/DCS)吸附纤维。通过正交试验方法优化壳聚糖改性工艺,利用单因素方法优化纺丝工艺,并对DSC粉末的化学结构、MCC/DCS吸附纤维形貌结构及其对刚果红染料吸附性能等进行测试与表征。结果表明:壳聚糖改性较优工艺为醋酸用量55 mL,2,5-二硫二脲用量0.6 g,壳聚糖用量1.0 g,甲醛用量8 mL;MCC/DCS纤维制备的较佳工艺为DCS添加量1.5 g,纺丝凝固时间1 h时,MCC/DCS吸附纤维的吸附效果和力学性能均较好;当刚果红染液质量浓度为250 mg/L时,MCC/DCS纤维对刚果红染料达到最大吸附量,为96.03 mg/g。Objective The pollution of dye wastewater to the environment seriously harms people′s health and is also an important factor restricting the development of textile enterprises.The adsorption method is a promising one for dye wastewater treatment.Natural polymeric cellulose and chitosan are widely used as adsorption materials for wastewater treatment because of the advantages in large capacity for storage,good adsorption,non-toxicity and easy degradation.In this research,an cotton stalk microcrystalline cellulose/chitosan(MCC/CS)adsorption fiber was prepared for the adsorption of Congo Red.Method Firstly,modified chitosan(DCS)was prepared by surface modification to CS with formaldehyde as crosslinking agent and 2,5-disulfide diurea as modifier,to improve their adsorption of Congo Red.The modified chitosan process was optimized by the orthogonal test method.Urea solvent method was used to dissolve MCC at low temperature as spinning matrix,DCS was added as insoluble dispersion adsorption material,composite fiber was prepared by wet spinning and freeze-drying,and the spinning process was optimized by the single factor method.Finally,the chemical structure of DCS was analyzed,the morphology and dye adsorption properties of MCC/DCS adsorbed fibers were tested and characterized.Results The modification of CS was carried out successfully,where the new C S characteristic absorption peaks at 1209 cm-1 appear and the absorption peak of-NH 2(2,5-dithiourea,DB)disappeared at 1640 cm-1 in DCS infrared spectrum.The combination of conditions obtained by orthogonal test for preparation of DCS was optimized,where acetic acid dosage was 55 mL,DB dosage was 0.60 g,CS dosage was 1.0 g,and formaldehyde dosage was 8 mL.The modified chitosan increased the contents of N and S elements,and the changes were obvious.The pore size of the MCC/DCS was larger than the MCC adsorbent fibers,and the modification CS was more beneficial to the adsorption of Congo Red by adsorbent fibers.The fracture strength of MCC/DCS adsorption fiber decreased g

关 键 词：改性壳聚糖 棉秆皮微晶纤维素 吸附材料 刚果红 吸附动力学 

分 类 号：TS102.2[轻工技术与工程—纺织工程] X791[轻工技术与工程—纺织科学与工程]