为了提高聚丙烯(PP)无纺布的吸油性能,通过在异丙醇/水混合酸性溶液中紫外辐照诱导的方法,成功将丙烯酸(AA)、甲基丙烯酸甲酯(MMA)单体接枝到 PP 基体上。考察了单体浓度、辐照时间等反应条件对聚丙烯无纺布接枝率的影响。利用衰减全反射红外光谱(FT-IR)、X射线光电能谱仪(XPS)和扫描电子显微镜(SEM)对接枝改性前后聚丙烯无纺布基体表面的化学组成和形貌结构进行了表征,并以原油为被吸附有机物考察了聚丙烯非织造布接枝前后的吸油性能。静态接触角测试表明接枝聚合改性处理后,PP无纺布的亲油性能显著增强。PP-g-(AA+MMA)的热稳定性通过差热分析(DTG )和差示扫描量热法(DSC)进行了表征。此外,改性处理后的聚丙烯无纺布基体的弹性势能也得到了显著提高。
In order to improve the hydrophilicity of polypropylene (PP)nonwovens,grafting of acrylic acid (AA)and methyl methacrylate (MMA)onto PP matrix through ultraviolet (UV)radiation was achieved in an isopropanol/water acidic aqueous solution.AA and MMA were grafted onto a pre irradiated PP matrix by a two-step grafting reaction for preparation of a novel composite sorbent PP-g-(AA+MMA).The grafting condi-tions were optimized and the effects of grafting parameters were investigated.The present study suggested that the grafting degree played a dominant role in the sorption implication of PP-g-(AA+MMA).Fourier transform infrared spectra (FT-IR)and X-ray photoelectron spectra (XPS)were used to characterize the chemical changes of the PP matrix surface.The morphological behaviors have been estimated using specific surface area,porosity and scanning electron microscopy (SEM).Static contact angle (CA)measurements showed that the hydrophi-licity of PP nonwoven was enhanced after graft polymerization.The thermal stability of PP-g-(AA+MMA) was evaluated by different thermo analysis (DTG)and differential scanning calorimetry (DSC).The improve-ment of reusability are shown as the increased of tensile modulus as a function of physical properties.
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