摘要
以丙烯酸(AA)为主要单体、过硫酸铵(APS)和过氧化二苯甲酰(BPO)为引发剂、季戊四醇丙烯酸酯(PETA)为交联剂,对聚丙烯(PP)非织造布进行接枝改性;再以聚丙烯酸(PAA)进行涂覆,以防水剂进行耐水与防水处理,制备PP均相阳离子交换膜;探讨了单体、引发剂、交联剂的浓度对接枝率的影响,以及不同防水剂处理对离子交换膜的含水率、离子交换量、力学性能、防水性能和导电性能的影响。结果表明:当接枝液中AA质量分数为30%、交联剂质量分数为6%、双引发剂BPO和APS总质量分数为3.2%时,接枝率最高,达到85%;以六羟树脂防水处理后,离子交换膜的离子交换量降低、力学性能提高,离子交换膜的含水率为28.0%、离子交换量为0.83 mmol/g、拉伸强度达8.89 MPa;六羟树脂处理后的PP离子交换膜的静水压差为2.96 kPa,六羟树脂的防水处理效果比含氟聚丙烯酸酯的防水处理效果好;相比PP非织造布,PP离子交换膜的导电性能明显提高,其表面电阻为1.7×10^(8)Ω。
Polypropylene(PP)nonwovens were grafted with acrylic acid(AA)as main monomer,ammonium persulfate(APS)and dibenzoyl peroxide(BPO)as initiators and pentaerythritol acrylate(PETA)as crosslinking agent and were produced into PP homogeneous cation exchange membrane after coating with polypropylene acid(PAA)and water-resistant and waterproof treatment with different waterproof agents.The effects of the concentrations of the monomer,initiators and crosslinking agent on the graft yield,and different waterproofing agents on the water content,ion exchange capacity,mechanical properties,waterproofing properties and electrical conductivity of ion exchange membrane were discussed.The results showed that the graft yield was maximized as 85%when the mass fraction of AA,crosslinking agent and BPO and APS biinitiator in the graft solution was 30%,6%and 3.2%,respectively;the ion exchange capacity of the ion exchange membrane was decreased and the mechanical properties were improved,including the water content of 28.0%,ion exchange capacity 0.83 mmol/g and tensile strength 8.89 MPa,after water-proof treatment with hexahydroxy resin;the hydrostatic pressure difference of PP ion exchange membrane treated with hexahydroxy resin was 2.96 kPa,and the waterproof effect of hexahydroxy resin was better than that of fluorinated polyacrylate;and the PP cation exchange membrane had the conductivity profoundly increased as compared with PP nonwovens and the surface resistance was 1.7×10^(8)Ω.
作者
高德贵
徐涛
林楚楚
陶然
朱新生
GAO Degui;XU Tao;LIN Chuchu;TAO Ran;ZHU Xinsheng(Faculty of Textile and Clothing,Soochow University,Suzhou 215021;Nantong Research Institute for Textile and Silk Industry Technology,Nantong 226300)
出处
《合成纤维工业》
CAS
2021年第4期17-23,共7页
China Synthetic Fiber Industry
基金
江苏省南通市政府财政资助项目(JC2019088)。
关键词
聚丙烯非织造布
离子交换膜
接枝改性
防水处理
结构
性能
polypropylene nonwovens
ion exchange membrane
graft modification
waterproofing treatment
structure
property
