Fabrication of functional nanofibrous biomimetic scaffolds for tissue regeneration remains a challenge. This work demonstrates that functional nanofibrous scaffolds were fabricated from blends of polylactide with other functional polymers by a thermally induced phase separation (TIPS) technique, here exemplified by the fabrication of electroactive nanofibrous scaffolds from the blends of polylactide and an electroactive degradable tetraaniline–polylactide–tetraaniline (TPT) block copolymer by TIPS. The TPT copolymer was synthesized by coupling reaction between the carboxyl-capped tetraaniline and polylactide. The chemical structure, electroactivity, thermal properties and mechanical properties of TPT and polylactide/TPT blend films were characterized. The copolymer blends were fabricated into electroactive nanofibrous scaffolds by TIPS. The effect of aniline tetramer content, polymer concentration and phase separation temperature on the diameter of nanofibers was investigated. The adhesion and proliferation of C2C12 myoblast cells and protein adsorption on the electroactive biodegradable substrates were evaluated, and the results show that the electroactive materials are nontoxic and could enhance the C2C12 cell proliferation without electrical stimulation, and adsorbed more proteins compared to polylactide. The electrical stimulation on the electroactive substrates significantly increased the cell proliferation of C2C12 myoblasts. This work opens the way to fabricate functional nanofibrous scaffolds from the blends of polylactide and other functional polymers by TIPS.
制造用于组织再生的功能性纳米纤维仿生支架仍是一项挑战。本研究通过热诱导相分离(
TIPS)技术,展示了利用聚
乳酸与其他功能聚合物的共混物制备功能性纳米纤维支架的方法,在此以利用聚
乳酸与电活性可降解四
苯胺-聚
乳酸-四
苯胺(
TPT)嵌段共聚物的共混物通过
TIPS 制备电活性纳米纤维支架为例进行说明。
TPT 共聚物是通过羧基封端四
苯胺和聚
乳酸之间的偶联反应合成的。研究人员对
TPT 和聚
乳酸/
TPT 共混薄膜的
化学结构、电活性、热性能和机械性能进行了表征。利用
TIPS 将共聚物混合物制成电活性纳米纤维支架。研究了
苯胺四聚物含量、聚合物浓度和相分离温度对纳米纤维直径的影响。评估了电活性
生物可降解基底上 C2C12 肌母细胞的粘附和增殖以及蛋白质的吸附情况,结果表明电活性材料无毒,无需电刺激即可增强 C2C12 细胞的增殖,并且与聚
乳酸相比吸附了更多的蛋白质。电活性基底上的电刺激能显著提高 C2C12 肌母细胞的细胞增殖。这项工作开辟了利用
TIPS 从聚
乳酸和其他功能聚合物混合物中制造功能性纳米纤维支架的途径。