【摘要】 以木葡糖醋杆菌纤维素(Gluconacetobacter xylinum Bacterial Cellulose，BC)膜为研究对象，添加海藻酸钠(Sodium Alginate，SA)、羧甲基纤维素钠(Sodium salt of Caboxy Methyl Cellulose，CMC-Na)和羧甲基纤维素(Carboxymethyl Cellulose，CMC)外源物质，采用原位培养制备改性膜并进行结构表征和理化分析。结果表明：BC、BC/SA、BC/CMC和BC/CMC-Na四种膜最大热分解温度分别为335.37 ℃、335.68 ℃、337.23 ℃和312.66 ℃；BC/SA膜纤维直径变小，拉伸强度和断裂伸长率分别为(14.96±0.24)MPa和(36±0.36)%，力学性能提高；BC/CMC膜和BC/CMC-Na膜孔径较大，致密性低，含水量和溶胀性能提高，BC/CMC-Na热稳定性下降。更多还原

【Abstract】 Gluconacetobacter xylinum bacterial cellulose(BC) membranes were taken as the research object,and sodium alginate (SA),sodium carboxymethyl cellulose (CMC-Na) and carboxymethyl cellulose (CMC) exogenous substances were added to prepare the modified membranes by in-situ culture,and the structural characterization and physicochemical analysis were carried out.The results showed that:the maximum thermal decomposition temperatures of the four membranes were 335.37 ℃,335.68 ℃,337.23 ℃ and 312.66 ℃,respectively,and the fiber diameter of BC/SA membranes decreased,and the tensile strength and elongation at break were (14.96±0.24) MPa and (36±0.36)%,respectively,and the mechanical properties of BC/CMC membranes and BC/CMC-Na were improved.The membrane pore size is large,the compactness is low,the water content and swelling properties are improved,and the thermal stability of BC/CMC-Na is reduced.更多还原