以天然高分子壳聚糖纤维为原料,制备了载银壳聚糖复合抗菌纤维,采用扫描电子显微镜、X射线能量色散谱仪、傅里叶变换红外光谱仪、X射线衍射仪对复合抗菌纤维的形貌及结构进行了表征,探讨了吸附过程的动力学及热力学特性,并测试了复合抗菌纤维的抗菌性能。结果表明,银离子能够负载到壳聚糖纤维表面,吸附过程符合准二级动力学模型,可用Freundlich吸附等温线拟合,属于既有物理吸附也有化学吸附的自发放热反应,最佳吸附时间为60min,吸附平衡时间为180min,理论饱和吸附量为162.34mg/g,最佳反应温度为30℃,最佳pH=6。复合抗菌纤维抗菌性能良好,18h对金黄色葡萄球菌及大肠杆菌抑菌率可达100%。
Silver(Ag) loaded chitosan(CS) composite antibacterial fiber was prepared from natural polymer chitosan fiber.The morphology and structure of the sample were characterized by SEM,EDS,FT-IR and XRD.The antibacterial properties of the sample were tested,and the kinetic and thermodynamic analysis of the adsorption process were discussed.The results showed that Ag ions were loaded onto CS fibers.The adsorption performance analysis showed that the adsorption kinetic process was in accordance with the pseudo second order kinetic model,it can be fitted by Freundlich isotherm,including physical adsorption and chemical adsorption spontaneous exothermic reaction.The optimal adsorption experiment time was 60min,the adsorption equilibrium time was 180min,the theoretical saturated adsorption capacity was 162.34mg/g,the optimal reaction temperature was 30℃,and the optimal adsorption pH=6.The antibacterial test showed that Ag-CS fiber had good antibacterial properties,100% antibacterial activity against Staphylococcus aureus and Escherichia coli.
[1] 周乐,王斌琦,聂毅.人工抗菌纤维的研究现状和发展趋势[J].化工学报,2020,71(10):1-24.
[2] Mellegård H,From C,Christensen B E,et al.Inhibition of bacillus cereus spore outgrowth and multiplication by chitosan[J].International Journal of Food Microbiology,2011,149(3):218-225.
[3] Li K,Xing R,Liu S,et al.Microwave-assisted degradation of chitosan for a possible use in inhibiting crop pathogenic fungi[J].Int J Biol Macromol,2012,51(5):767-773.
[4] Vikhoreva G,Bannikova G,Stolbushkina P,et al.Preparation and anticoagulant activity of a low-molecular-weight sulfated chitosan[J].Carbohydrate Polymers,2005,62(4):327-332.
[5] 付俊锋,毛国梁.壳聚糖的抗菌能力研究进展[J].化工科技,2018,26(4):69-75.
[6] 孔杰.银/壳聚糖纳米复合材料的制备、表征及抗菌性能研究[D].广州:暨南大学,2013.
[7] Luo X,Li L.Evaluation of single-component chitosan fiber:from advanced materials to contemporary fashion manufacturing[J].Textile Research Journal,2019,90(2):1-10.
[8] 秦益民.壳聚糖纤维的理化性能和生物活性研究进展[J].纺织学报,2019,40(5):176-182.
[9] Dooa A M B N.Preparation of antibacterial cotton fabric using chitosan-silver nanoparticles[J].Fibers & Polymers,2015,16(7):1519-1526.
[10] FZ/T 73023—2006 抗菌针织品[S].北京:中国标准出版社,2006.
[11] 计芬芬,顾珍,谭玉静,等.纺织品抗菌性能的改良振荡法测定[J].印染,2012(15):40-43.
[12] 闫学超.壳聚糖/β-环糊精/纳米氧化锌复合多孔膜的制备及其对铜离子和刚果红的吸附研究[D].广州:华南理工大学.
[13] 张苏敏,魏永锋,郎惠云.壳聚糖银(Ⅰ)配合物的合成及吸附动力学[J].化学通报,2005(4):296-300.
[14] 冯晓燕,郑坤,陈莹,等.壳聚糖-银纳米微粒表面修饰木纤维的制备及抗菌性能研究[J].生物质化学工程,2017,51(1):1-6.
[15] Dara P K,Mahadevan R,Digita P A,et al.Synthesis and biochemical characterization of silver nanoparticles grafted chitosan (Chi-Ag-NPs):in vitro studies on antioxidant and antibacterial applications[J].SN Applied Sciences,2020,2(4):665-677.
[16] 卞能源,潘玙璠,张新莉,等.载银氧化壳聚糖复合物的制备及其抑菌性能的研究[J].功能材料,2019,50(12):12118-12125.
[17] 牛梅,戴晋明,侯文生,等.载银壳聚糖复合物的结构及其抗菌性能研究[J].材料导报,2011,25(10):15-18.
[18] Li Q,Yang D,Ma G,et al.Synthesis and characterization of chitosan-based hydrogels[J].International Journal of Biological Macromolecules,2009,44(2):121-127.
[19] Simonin J P.On the comparison of pseudo-first order and pseudo-second order rate laws in the modeling of adsorption kinetics[J].Chemical Engineering Journal,2016,300:254-263.
[20] Mu Chaoqun,Zhang Liang,Zhang Xiaomin,et al.Selective adsorption of Ag(Ⅰ) from aqueous solutions using Chitosan/polydopamine@C@magnetic fly ash adsorbent beads[J].Journal of Hazardous Materials,2020,381:120943.
[21] Wang H,Cui J,Li M,et al.Selective recovery of lithium from geothermal water by EGDE cross-linked spherical CTS/LMO[J].Chemical Engineering Journal,2020,389:124410-124419.
[22] Ahmad M,Manzoor K,Venkatachalam P,et al.Kinetic and thermodynamic evaluation of adsorption of Cu(Ⅱ) by thiosemicarbazide chitosan[J].International Journal of Biological Macromolecules,2016,92:910-919.
基金资助
天津市科技计划项目(18YFJLCG00120);天津市海洋资源与化学重点实验室(天津科技大学)开放基金(201808)
PDF
