无溶剂改性PE-HD耐污复合材料的制备与性能

Preparation and Properties of Solvent-free Modified PE-HD Anti-fouling Composites

为缓解废水集输管道堵塞问题,采用本体聚合方法合成含氟聚丙烯酸酯(PFA)和含硅聚丙烯酸酯聚合物(PSA),将PFA,PSA和疏水改性纳米SiO_(2)作为填料加入到高密度聚乙烯(PE-HD)基体中,通过熔融共混制备低表面能PE-HD/PFA/纳米SiO_(2)复合材料(FAPE)和PE-HD/PSA/纳米SiO_(2)复合材料(SAPE)。利用傅里叶变换红外光谱分析、接触角测试、电化学腐蚀测试、热重分析等多种表征分析手段,研究了复合材料的化学结构、耐腐蚀性能、热性能、耐酸碱性能、防污和抗菌性能。结果表明,加入含氟单体的PFA聚合物表现出较优异的耐腐蚀性能;PFA,PSA和疏水改性纳米SiO_(2)颗粒的加入显著降低了PE-HD的表面能,PFA或PSA与疏水改性纳米SiO_(2)和PE-HD的质量比为11∶7∶82时,制备的复合材料FAPE和SAPE的表面能分别为26.6 mJ/m^(2)和24.7 mJ/m^(2);复合材料具有良好的热稳定性,在pH值范围为2-12的溶液中表现出良好的耐酸碱性能,其耐腐蚀、防污和抗菌性能均优于典型的商业排水用聚氯乙烯管材。

To mitigate the blockage in waste water pipeing,the fluorine-containing polyacrylate(PFA)and silicon-containing polyacrylate(PSA)were synthesized by bulk polymerization.PFA,PSA and hydrophobically modified nano-SiO_(2) were added as fillers into high-density polyethylene(PE-HD)resin to prepare PE-HD/PFA/nano-SiO_(2) composite(FAPE)and PE-HD/PSA/nano-SiO_(2) composite(SAPE)with low surface energy by melt blending.Through the characterization of Fourier infrared spectroscopy analysis,contact angle test,electrochemical corrosion test,and thermogravimetric analysis,etc.,the chemical structures,corrosion resistances,thermal properties,acid and alkali resistances,anti-fouling and anti-bacterial properties of the composites were studied.The results show that PFA polymer with fluorine-containing monomer has excellent corrosion resistance,and the addition of PFA,PSA and hydrophobic nano-SiO_(2) particles significantly reduces the surface energy of PE-HD.When the mass ratio of PFA or PSA,nano-SiO_(2) and PE-HD is 11∶7∶82,the surface energies of FAPE and SAPE are 26.6 mJ/m^(2) and 24.7 mJ/m^(2),respectively.The composites have good thermal stability,and show good acid and alkali resistance in the pH range of 2–12 solution,and their corrosion resistance,anti-fouling and anti-bacterial properties are better than those of typical commercial polyvinyl chloride pipes for drainage.