School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China; School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China.
School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China.
Carbohydr Polym. 2015 May 5;121:428-35. doi: 10.1016/j.carbpol.2014.12.069. Epub 2015 Jan 5.
Quaternized carboxymethyl chitosan (QCM-chitosan) and organic rectorite (OREC) immobilized nanofibrous mats are fabricated via layer-by-layer (LBL) technique in a self-assembly manner. The negatively charged cellulose nanofibrous mats hydrolyzed from electrospun cellulose acetate (CEL) mats are alternately modified with the positively charged QCM-chitosan and OREC intercalated composites and the negatively charged sodium alginate (ALG) via LBL technique. The morphology and antibacterial activity of the resultant mats are studied by changing the number of deposition bilayers, the compositions of dipping solutions and outermost layer. X-ray photoelectron spectroscopy results imply that QCM-chitosan and OREC are coated on cellulose mats. Besides, wide angle X-ray diffraction and small angle X-ray diffraction are applied to investigate the crystalline of the composite mats and the interlayer distance of OREC, respectively. The antibacterial activity of the mats increases with the incorporation of OREC into LBL films.
季铵化羧甲基壳聚糖（QCM-壳聚糖）和有机累托石（OREC）固定化纳米纤维垫通过层层（LBL）技术以自组装的方式制备。从静电纺丝醋酸纤维素（CEL）垫水解得到的带负电荷的纤维素纳米纤维垫通过 LBL 技术与带正电荷的 QCM-壳聚糖和 OREC 插层复合材料以及带负电荷的海藻酸钠（ALG）交替修饰。通过改变沉积双层的数量、浸渍溶液的组成和最外层来研究所得垫的形态和抗菌活性。X 射线光电子能谱结果表明 QCM-壳聚糖和 OREC 涂覆在纤维素垫上。此外，广角 X 射线衍射和小角 X 射线衍射分别用于研究复合垫的结晶度和 OREC 的层间距离。随着 OREC 掺入 LBL 薄膜，垫的抗菌活性增加。
