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,并优化了复合纳米纤维的制备工艺,最终可制得直径为356 nm,标准方差为0.28的复合纳米纤维.利用扫描电子显微镜、红外光谱、X射线衍射和差示扫描量热分析对复合纳米纤维进行了表征.结果表明,复合纳米纤维表面非常光滑,纤维间呈无序排列,有较高的孔隙;复合纳米纤维的结晶结构与P(3HB-co-4HB)的结晶结构基本相同,少量CA(10％)的加入能促进复合纳米纤维的快速结晶,起到成核剂的作用,从而使纳米纤维的结晶度得到提高,CA加入量过多时,结晶度下降;随着CA含量的增加,复合纳米纤维的玻璃化转变温度从46.6℃下降至21.3℃,而熔融温度变化不大,在130℃附近.
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