中文摘要：

纳米纤维素（NCC）表面的羟基可以与乙烯-乙烯醇塑料（EVOH）接枝SO3Li的表面羟基相互作用形成氢键，使两者结合更加紧密。用聚合物共混原理，将酸水解法制备的NCC按一定比例添加到以N，N-二甲基乙酰胺为溶剂的EVOH-SO3Li纺丝液中均匀混合。用高压静电纺丝技术制备EVOH-SO3Li／NCC复合隔膜，测试并分析其性能。结果表明，NCC添加后，EVOH-SO3Li／NcC复合隔膜的力学性能、热性能得到了一定程度的提高。当NCC含量为3％时，复合隔膜的拉伸强度达到最大值2．42MPa，相较不合NCC时的拉伸强度1．92MPa有较大提高，初始热分解温度也由252．18℃提高到262．90℃。

英文摘要：

Nano cellulose（NCC） surface hydroxyls and Ethylene-vinyl alcohol plastic（EVOH）-SO3Li surface hydroxyls can form hydrogen bonds, in turn the bonds made the two united more closely. Based on polymer blending theory, NCC made by the acid hydrolysis method was mixed into EVOH-SO3Li liquid which was taken N, N-two methyl ethyl amide as the solvent. The composite diaphragms were prepared by using high pressure EVOH-SO3Li / NCC lithium-ion battery technology. The properties of EVOH-SO3Li / NCC lithium-ion battery diaphragm were tested and analyzed. The results show that mechanical and thermal performance of composite diaphragm with NCC is better. Moreover, the maximum tensile strength of the composite diaphragm of EVOH-SO3Li / NCC with 3% NCC is 2.42 MPa, which has great degrees of increase than EVOH-SO3Li （1.92MPa）. Thermally decomposed temperature is increased from 252.18℃ to 262.90℃.