对位芳香族聚酰胺多孔膜制备及性能研究
发布时间：2018-11-23 06:07
【摘要】：以浓硫酸为溶剂,以聚乙二醇(PEG)、聚乙烯吡咯烷酮(PVP)为致孔剂,以二氧化硅(SiO2)无机粒子为添加剂,采用溶液相转化法制备了聚对苯二甲酰对苯二胺(PPTA)多孔平板膜,考察了膜的纯水通量、孔隙率、力学性能、热稳定性等性能,并用场发射电子扫描显微镜(FESEM)观察了膜表面形貌.结果表明:所得PPTA多孔膜为具有不对称结构的非均质膜,随着无机粒子SiO2含量提高、致孔剂混合、凝固浴温度的增加,膜渗透性能增大;膜力学性能随SiO2含量提高而提高,最大断裂强度可达1.5 MPa,断裂伸长率由7%增大到14%左右;而热稳定性随SiO2含量提高无明显变化,热分解温度均可达400℃以上.
[Abstract]:Using concentrated sulfuric acid as solvent, polyethylene glycol (PEG), polyvinylpyrrolidone (PVP) as pore-forming agent, silicon dioxide (SiO2) inorganic particle as additive, Poly (terephthalyl p-phenylenediamine) (PPTA) porous flat membrane was prepared by solution phase inversion method. The pure water flux, porosity, mechanical properties and thermal stability of the membrane were investigated. The surface morphology of the film was observed by field emission electron scanning microscope (FESEM). The results show that the PPTA porous membrane is a heterogeneous membrane with asymmetric structure. With the increase of SiO2 content of inorganic particles, the mixing of pore-forming agent and the increase of coagulation bath temperature, the permeability of the membrane increases. The mechanical properties of the membrane increased with the increase of SiO2 content, and the maximum breaking strength of the membrane increased from 7% to 14%, but the thermal stability did not change with the increase of SiO2 content, and the thermal decomposition temperature was above 400 鈩，
本文编号：2350545
[Abstract]:Using concentrated sulfuric acid as solvent, polyethylene glycol (PEG), polyvinylpyrrolidone (PVP) as pore-forming agent, silicon dioxide (SiO2) inorganic particle as additive, Poly (terephthalyl p-phenylenediamine) (PPTA) porous flat membrane was prepared by solution phase inversion method. The pure water flux, porosity, mechanical properties and thermal stability of the membrane were investigated. The surface morphology of the film was observed by field emission electron scanning microscope (FESEM). The results show that the PPTA porous membrane is a heterogeneous membrane with asymmetric structure. With the increase of SiO2 content of inorganic particles, the mixing of pore-forming agent and the increase of coagulation bath temperature, the permeability of the membrane increases. The mechanical properties of the membrane increased with the increase of SiO2 content, and the maximum breaking strength of the membrane increased from 7% to 14%, but the thermal stability did not change with the increase of SiO2 content, and the thermal decomposition temperature was above 400 鈩，
本文编号：2350545
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