摘要
为制备具有防水透湿性能的超细纤维膜,在聚氨酯(PU)纺丝液中添加疏水二氧化硅(SiO_2)颗粒,制备PU/SiO_2复合超细纤维膜。通过软件模拟分析了纺丝液浓度和纤维膜厚度对纤维膜孔径的影响,根据静态水接触角、静水压、透气率和透湿率分析了复合超细纤维膜的防水透湿性能,并讨论了不同质量分数SiO_2对PU/SiO_2复合超细纤维膜防水透湿性能的影响。结果表明:复合纤维膜的孔径随着纺丝液浓度的增加而增加,随着纤维膜厚度的增加而减少;当SiO_2质量分数为9%、PU质量分数为18%时,PU/SiO_2复合纤维膜的静态水接触角达到131°,静水压为6.4 kPa,透气率为33.4 mm/s,透湿率为8.065 kg/(m^2·d);该条件下复合纤维膜断裂应力为4.16 MPa,断裂伸长率为184%,与纯PU膜相比具有较好的尺寸稳定性。
In order to prepare a superfine fiber membrane with waterproof and moisture-permeable properties, polyurethane/silica (PU/SiO 2) membranes were prepared by electrospinning. The spinning solution was prepared by adding hydrophobic SiO 2 to PU solution. The effects of spinning solution concentration and membranes thickness on the pore size of the membranes were analyzed by software simulation. The waterproof and moisture-permeable properties of the membranes were characterized by the water contact angle, hydrostatic pressure, air permeability and moisture permeability. The effects of different SiO 2 concentrations on the waterproof and moisture-permeable properties of the PU/SiO 2 composite superfine fiber membranes were studied. The results show that the pore size of membranes increase with the spinning solution concentrations, and decrease with the increase of the membranes thickness. When the concentration of SiO 2 is 9% and that of PU is 18%, the composite membranes are endowed with the water contact angle of 131°, the hydrostatic pressure of 6.4 kPa, the air permeability of 33.4 mm/s and the moisture permeability up to 8.065 kg /(m 2 ·d). Meantime, the broken stress of the PU/SiO 2 composite membranes reaches 4.16 MPa, and the elongation at break reaches 184%. Therefore, the membranes have better dimensional stability than pure PU membranes.
作者
张琼
刘翰霖
李平平
李妮
ZHANG Qiong;LIU Hanlin;LI Pingping;LI Ni(Silk Institute,College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China;Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education,Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2019年第2期1-7,共7页
Journal of Textile Research
基金
浙江省自然科学基金项目(LY16E030007)
浙江理工大学521人才培养计划项目(11110132521507)
关键词
聚氨酯
二氧化硅
静电纺丝
防水透湿
polyurethane
silica
electrospinning
waterproof and moisture-permeable property
