采用静电纺丝法制备了3-羟基丁酸-4-羟基丁酸共聚物(P(3HB-co-4HB))/醋酸纤维素(CA)复合纳米纤维,研究了水解处理对静电纺P(3HB-co-4HB)/CA复合纳米纤维形貌、结构及性能的影响.水解处理后纤网结构仍然保持完整,但复合纳米纤维的平均直径有所下降,纤网结构变得更密实.在水解处理过程中乙酰基转变为羟基,随着水解时间的延长,羟基含量增加,CA分子链的结构变得规整,羟基之间的相互作用使分子链能够规整排列,从而有助于CA和P(3HB-co-4HB)的结晶.水解处理后,复合纳米纤维的热稳定性得到明显提高、材料由疏水性转变为亲水性,力学性能有较大幅度的提升,更有利于细胞的粘附.水解处理后的P(3HB-co-4HB)/CA复合纳米纤维更适宜用作生物材料应用在组织工程支架材料领域.
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