聚偏氟乙烯-聚丙烯腈/SiO_(2)单向导湿纤维膜的制备及其性能  

Preparation and properties of polyvinylidene fluoride-polyacrylonitrile/SiO_(2)fibrous membrane with unidirectional water-transport function

作　　者：雷福旺 冯其 侯奥菡 赵振鸿 谭佳兆 赵景 王先锋 LEI Fuwang;FENG Qi;HOU Aohan;ZHAO Zhenhong;TAN Jiazhao;ZHAO Jing;WANG Xianfeng(College of Textile Materials and Engineering,Wuyi University,Jiangmen,Guangdong 529020,China;School of Applied Physics and Materials,Wuyi University,Jiangmen,Guangdong 529020,China;College of Textiles,Donghua University,Shanghai 201620,China)

机构地区：[1]五邑大学纺织材料与工程学院,广东江门529020 [2]五邑大学应用物理与材料学院,广东江门529020 [3]东华大学纺织学院,上海201620

出　　处：《纺织学报》2024年第12期1-8,共8页Journal of Textile Research

基　　金：国家自然科学基金项目(52203068);广东省自然科学基金面上项目(2024A1515012048)。

摘　　要：针对当前导湿材料的导湿性能差、穿着不舒适等问题,分别以聚偏氟乙烯(PVDF)和聚丙烯腈(PAN)/SiO_(2)为原料,通过静电纺丝制备疏水层和具有取向结构的亲水层,并探究PVDF层厚度对复合纤维膜的孔径、单向导湿指数、透湿透气性能和力学性能的影响。结果表明:随着PVDF层纺丝时间的增加,双层纤维膜的孔径逐渐减小,当PVDF层的纺丝时间为3 h时,所制备的复合纤维膜的透湿率为8.7 kg/(m^(2)·d),透气率为196.5 mm/s,拉伸断裂强度为1.4 MPa;此外,由于亲水层PAN/SiO_(2)纤维高度取向,加快了水分在该层的扩散和蒸发,双层膜可在2 s内由内向外单向传输液体,单向导湿指数高达1778.2%,具有良好的液体单向传导性能。Objective Existing hygroscopic and perspirant fabrics have poor moisture conductivity and insufficient wearing comfort.The essence of hygroscopic and perspirant wicking is to use the difference in the absorption of sweat between the inner and outer layers of the fabric to conduct human sweat to the outer side of the fabric and evaporate,so as to keep the surface of the skin dry.In order to meet people′s demand for clothing comfort,fabrics with moisture absorption and sweat wicking function have good development prospects and high practical value.In this study,a single wet double-layer fiber membrane with polyvinylidene fluoride(PVDF)as hydrophobic layer and polyacrylonitrile(PAN)and silica as hydrophilic layer was prepared.Method The hydrophobic PVDF layer and the hydrophilic PAN/SiO_(2)layer with orientation structure were prepared by electrospinning technology according to the single guided wetting mechanism of the fiber membrane.The double-layer composite fiber membrane has pore size gradient structure and surface wettability gradient structure.The pore size gradient was constructed by adjusting the thickness of PVDF layer,and the relationship between the thickness and the single moisture index,moisture permeability and mechanical properties of the doublelayer composite fiber membrane was analyzed.Results The spinning time of PVDF layer was adjusted to 2.0,2.5,3.0 and 3.5 h respectively,and the corresponding fiber membrane thickness was 295.1,305.8,314.7 and 324.5μm,respectively,which showed a positive correlation with the spinning time.With the increase of the spinning time of the PVDF layer,the pore size of the hydrophobic layer was decreased and the distribution range of the pore size were narrowed gradually,while the pore size of the hydrophilic layer became much smaller than that of the hydrophilic layer,thus constructing a gradient structure from the hydrophobic layer to the hydrophilic layer.PVDF layer spinning time of 3.0 h showed the best wetting effect,where water was able to penetrate the fiber m

关 键 词：功能材料 静电纺丝 微纳米纤维 单向导湿 双层复合纤维膜 取向结构 

分 类 号：TS540.20[轻工技术与工程—皮革化学与工程]