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摘要
采用悬浮聚合法,以不同分子量的聚苯乙烯磺酸钠制备亲水改性的聚苯乙烯磺酸钠接枝聚砜(SPS-g-PSF),利用相转换法制备了具有聚酯筛网包埋支撑层的正渗透膜,通过扫描电子显微镜、接触角测试仪、红外光谱仪和拉力试验机等手段表征了支撑层的微观形貌、亲水性、化学结构及力学性能。结果表明:低分子量的聚苯乙烯磺酸钠接枝改性的效果更好,大大提高了支撑膜的亲水性,从而提高了正渗透膜的水通量,1% 7w分子量的聚苯乙烯磺酸钠改性的正渗透膜水通量达到了17.2LMH,且其盐通量仅为4.3gMH,接触角为55.40°。聚酯筛网包埋提升了支撑层的抗拉伸强度,其断裂伸长率、抗拉强度分别达到了59.32%和38.67N/cm2。
Abstract
As a major obstacle of forward osmosis membrane to achieve high water flux,different molecular weight of sodium polystyrene sulfonate (SPS) were grafted onto polysulfone (PSF) using suspension polymerization to enhance its hydrophilicity.To obtain its chemical structure,morphology,hydrophilicity and mechanical property,grafted polymer and membrane made by phase inversion were characterized with SEM,infrared spectroscopy,drop shape analyzer and tension tester.Low molecular weight SPS was proved with high reactivity which leaded to high grafting rate and hydrophilicity.The water flux of 1% SPS with the molecular weight 7w grafted membrane reached 17.2LMH,with salt flux 4.3gMH,water contact angle 55.40°.Moreover,the embedded mesh enhanced its tensile strength and elongnation at break to 38.67N/cm2 and 59.32% respectively.
关键词
聚苯乙烯磺酸钠
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接枝改性
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正渗透膜
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水通量
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抗拉强度
Key words
sodium polystyrene sulfonate
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chemical grafting
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forward osmosis membrane
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water flux
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tensile strength
聚苯乙烯磺酸钠改性正渗透膜的制备及性能研究[J].
化工新型材料, 2018, 46(7): 114-117 DOI:
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基金资助
国家自然科学基金(51478452)
