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首页> 外文期刊>Journal of Applied Polymer Science >Surface modification of polyethersulfone membrane to improve its hydrophobic characteristics for waste frying oil filtration: Radio frequency plasma treatment
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Surface modification of polyethersulfone membrane to improve its hydrophobic characteristics for waste frying oil filtration: Radio frequency plasma treatment

机译：聚醚砜膜的表面改性以改善其疏水性，以用于废油炸油过滤：射频等离子体处理

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摘要

In this study, polyethersulfone (PES) membrane was subjected to surface modification using hexamethyldisiloxane (HMDSO) and 1,1,1,3,3,3-hexafluoro-2- propanol (HFIP) in radio frequency (RF) plasma system to improve its hydrophobic property for recovery of waste frying oil. Structural and morphological changes on the membrane surfaces were characterized by contact angle measurements, Fourier transform infrared spectroscopy-attenuated total reflection (FTIR-ATR) and atomic force microscopy (AFM). Permeate fluxes, physical and chemical properties of waste frying oil and waste frying oil-methanol micella (oil/methanol 1/3, 1/1, 1/3, v/v) after filtration through unmodified and modified PES membranes were investigated. The results showed that PES membranes modified with HMDSO at 75 W for 5 min (discharge power-exposure time) selectively rejected total polar compounds (TPC) and free fatty acids (FFAs) of waste frying oil to the extent of 46.9-48% and 35.3-40%, respectively. Furthermore, the viscosity of waste frying oil was reduced to the extent of 9.4-12.8%. RF-plasma-treated PES membranes appeared to improve the regeneration of waste frying oils and allow these oils to be used for either repeated frying operations or biodiesel production.
机译：在这项研究中，使用六甲基二硅氧烷（HMDSO）和1,1,1,3,3,3-六氟-2-丙醇（HFIP）在射频（RF）等离子体系统中对聚醚砜（PES）膜进行表面改性，以改善具有疏水性，可回收废煎炸油。通过接触角测量，傅立叶变换红外光谱衰减全反射（FTIR-ATR）和原子力显微镜（AFM）来表征膜表面的结构和形态变化。研究了通过未改性和改性的PES膜过滤后的废煎炸油和废煎炸油-甲醇胶束（油/甲醇1 / 3、1 / 1、1 / 3，v / v）的渗透通量，理化性质。结果表明，在75 W下用HMDSO改性的PES膜在5分钟（放电功率暴露时间）下选择性地拒绝了废煎炸油中的总极性化合物（TPC）和游离脂肪酸（FFA）达46.9-48％。分别为35.3-40％。此外，废煎炸油的粘度降低到9.4-12.8％的程度。 RF-等离子体处理过的PES膜似乎可以改善废煎炸油的再生，并可以将这些油用于重复煎炸操作或生物柴油生产。

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