纤维素酶预处理对纤维素-Ag复合抗菌材料制备的影响

摘要

采用原位还原法,以竹浆纤维为基体,纤维素为还原剂,在纤维素纤维表面还原银离子得到纤维素-Ag复合抗菌材料.通过纤维素酶预处理提高纤维素的还原性,以期更多的Ag+被还原在纤维表面.使用偏振塞曼原子吸收光谱检测纤维素纤维中Ag含量,采用抑菌圈法评价复合材料的抗菌性能.结果表明:利用纤维素酶预处理对于提高纤维素的还原性有一定的效果,纤维素酶用量50 u/g,温度50℃,pH5左右时,纤维素还原银离子的效果最佳,纤维素-Ag复合抗菌材料纤维表面银负载量最高,抗菌性最优.%Cellulose-Ag composites were obtained by reducing Ag+ on the surface of cellulose with in-situ method.Cellulase was used to improve the reducibility of cellulose which was important for the amount of reduced Ag on the surface of fiber.Polarized Zeeman atomic ab-sorption spectrum was used to detect Ag amount of composites.The anti-bacterial properties of composite materials were evaluated by inhibition zone method.Result shown that,cellulase was benefit for the elevation of cellulose reducibility.The optimum conditions of cellulase per-treatment were 50 u/g cellulase addition,50 ℃,pH = 5.Moreover,the anti-bacterial properties of composite were increasing with the augment of Ag amount.