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《工程塑料应用》 2020年第02期
DOI:10.3969/j.issn.1001-3539.2020.02.002
非织造布结构对PVC-C/PET复合膜的结构与性能影响
詹晓梅1,程继锋1,邵会菊2,秦舒浩12
1.贵州大学材料与冶金学院,贵阳 550025; 2.国家复合改性聚合物材料工程技术研究中心,贵阳 550014 
Effect of Non-woven PET Fabrics with Different Microstructure on the Structure and Properties of PVC-C/PET Composite Membranes
Zhan Xiaomei1, Cheng Jifeng1, Shao Huiju2, Qin Shuhao12
1. College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, China; 2. National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, China 
摘要:以PVC-C为成膜聚合物,N,N-二甲基乙酰胺(DMAc)为溶剂,以聚对苯二甲酸乙二酯(PET)非织造布为支撑层,将凝固涂层工艺与非溶剂诱导相分离法相结合,制备了PVC-C/PET复合多孔膜。通过接触角测量仪、场发射扫描电子显微镜、孔径分布、孔隙率、纯水通量、碳素墨水截留、拉伸试验等系统研究了非织造布结构对PVC-C/PET复合膜孔结构和渗透性能的影响。结果表明,采用密度小、结构疏松的PET非织造布作为PVC-C微孔膜的支撑材料,制得的PVC-C/PET复合膜表面开孔程度增加,内部海绵状结构更疏松,孔隙率增大,降低了跨膜阻力,纯水通量从88.49 L/(m2·h)提高到186.85 L/(m2·h),与原膜相比提高了211.1%。此外,PVC-C/PET复合膜具有良好的截留性能,对碳素墨水截留率均保持99%以上,同时复合膜的拉伸强度和断裂伸长率明显增大。 
Abstract:The chlorinated polyvinyl chloride (PVC-C) porous membrane was fabricated on the polyethylene terephthalate (PET) non-woven fabric by non-solvent induced phase separation (NIPS) combined with coagulation coating process. The properties of non-woven fabric and PVC-C/PET composite membranes were evaluated from pure water contact angle, field emission scanning electron microscope (FESEM), pore size distribution, porosity, pure water flux, carbon ink rejection and tensile testing. The forming mechanism of PVC-C/PET composite membranes was investigated according to the effects of non-woven fabric microstructure. The results indicate using PET nonwovens with low density and loose structure as the support material of PVC-C microporous membrane, the surface opening degree of PVC-C/PET composite membrane is increased, the internal sponge structure is more loose, the porosity is increased, and the cross membrane resistance is reduced. The PVC-C/PET composite membranes obviously exhibited higher pure water flux of 186.85 L/(m2·h), which is increased by 211.1% compared with the membrane without support layer[88.49 L/(m2·h)]. The rejection to ink suspension is over 99%. Furthermore, the tensile strength and elongation at break of composite membrane is also greatly improved on account of the special microstructure of non-woven fabric. 
关键词:氯化聚氯乙烯;非织造布;非溶剂诱导相分离;微滤膜;力学性能 
Keywords:chlorinated polyvinyl chloride; non-woven fabric; non-solvent induced phase separation; microporous membrane; mechanical property 
基金:贵州省高层次人才项目([2015]4014,[2019]5633),贵州省科技计划项目([2019]1422) 
本文引用格式:
詹晓梅,程继锋,邵会菊,等.非织造布结构对PVC-C/PET复合膜的结构与性能影响[J].工程塑料应用,2020,48(2):6-12.
Zhan Xiaomei,Cheng Jifeng,Shao Huiju,et al. Effect of non-woven PET fabrics with different microstructure on the structure and properties of PVC-C/PET composite membranes[J]. Engineering Plastics Application,2020,48(2):6-12. 

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