利用静电纺丝技术构建了新型三维纳米通道系统.在不同质量分数的聚苯乙烯(PS:Mw=1.3×105)溶液中加入一定量十二烷基磺酸钠(SDS),于不同电压下进行静电纺丝.所得纤维在90℃加热粘连后,形成三维聚苯乙烯纳米网络模板,然后于聚二甲基硅氧烷(PDMS)预聚体(含10％交联剂)灌注进入上述模板并交联形成网络复合材料,再用二硫化碳超声除去聚苯乙烯纤维.采用扫描电子显微镜、透射电子显微镜对纤维模板形貌和纳米通道进行了表征.结果表明,质量分数为10％的PS溶液加入0.5％ SDS,在20 kV电压下进行静电纺丝,得到直径为150 nm的纤维.SDS的加入对纺丝纤维具有平滑作用,使得粘连的纤维模板更易去除,形成的三维纳米通道直径约160 nm,与纤维模板直径一致.该类型纳米通道可以应用于医学药物载体、纳流控芯片等众多领域.
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