用甲基丙烯酸-β-羟丙酯(HPMA)与含羧基的聚氨酯预聚体反应得到双键封端的聚氨酯大单体,然后将离子化聚氨酯大单体与丙烯酸六氟丁酯(F6BA)采用乳液聚合法合成了水性聚氨酯/F6BA复合乳液(FPUL),研究了FPUL的微观结构、热性能、粒子形态...用甲基丙烯酸-β-羟丙酯(HPMA)与含羧基的聚氨酯预聚体反应得到双键封端的聚氨酯大单体,然后将离子化聚氨酯大单体与丙烯酸六氟丁酯(F6BA)采用乳液聚合法合成了水性聚氨酯/F6BA复合乳液(FPUL),研究了FPUL的微观结构、热性能、粒子形态和表面自由能。结果表明,通过聚合F6BA接枝到聚氨酯上,且复合乳液具有核壳结构,核层约237 nm,壳层约132 nm;FPUL固体具有2个玻璃化转变温度(Tg),软段的Tg为6.5℃,高于聚氨酯大单体的软段;硬段的Tg为43.8℃,低于聚氨酯大单体的硬段;当F6BA质量分数为总量的50%时,FPUL薄膜的表面自由能减至11.56 m J/m2。展开更多
In order to enhance the water repellence property of cotton fabric, cotton fabric was grafted using hexafluorobutyl methacrylate( HFMT) monomer via atom transfer radical polymerization( ATRP) method. Water repellent c...In order to enhance the water repellence property of cotton fabric, cotton fabric was grafted using hexafluorobutyl methacrylate( HFMT) monomer via atom transfer radical polymerization( ATRP) method. Water repellent cotton fabric was successfully prepared, and characterized by scanning electron microscopy( SEM),Fourier transform infrared spectroscopy( FTIR), and X-ray photoelectron spectroscopy( XPS). The SEM images of the HFMT-treated cotton displayed significant difference from the untreated one. FT-IR characterization of the HFMTtreated cotton indicated that HFMT was successfully grafted onto the surface of the cotton fabric. XPS analysis indicated that the fluorine element of the HFMT-treated cotton existing on the surface of the cotton fabric. The surface contact angle test as well as the water repellence rating test showed that the water repellence of the HFMTtreated cotton fabric was much better than that of the untreated cotton fabric. The surface contact angle of the HFMT-treated cotton fabric could reach( 132. 4 ± 2. 2) °,and the water repellence rating could achieve grade 3. The washing durability of the HFMT-treated fabric was also investigated. The surface contact angle of the HFMTtreated cotton fabric could reach( 121. 1 ± 2. 1) ° after 20 washing times. Furthermore, the whiteness, air permeability, breaking strength,and breaking elongation of the HFMT-treated cotton fabric decreased slightly compared with the untreated cotton fabric.Finally,cotton fabric with good water repellence property and excellent washing durability could be obtained with little effect on the intrinsic properties of cotton fabric.展开更多
文摘用甲基丙烯酸-β-羟丙酯(HPMA)与含羧基的聚氨酯预聚体反应得到双键封端的聚氨酯大单体,然后将离子化聚氨酯大单体与丙烯酸六氟丁酯(F6BA)采用乳液聚合法合成了水性聚氨酯/F6BA复合乳液(FPUL),研究了FPUL的微观结构、热性能、粒子形态和表面自由能。结果表明,通过聚合F6BA接枝到聚氨酯上,且复合乳液具有核壳结构,核层约237 nm,壳层约132 nm;FPUL固体具有2个玻璃化转变温度(Tg),软段的Tg为6.5℃,高于聚氨酯大单体的软段;硬段的Tg为43.8℃,低于聚氨酯大单体的硬段;当F6BA质量分数为总量的50%时,FPUL薄膜的表面自由能减至11.56 m J/m2。
基金National Natural Science Foundations of China(Nos.51203107,51273134,and 51273140)Jiangsu Province Project of Postgraduate Innovation Engineering,China(No.CXZZ13_0818)+1 种基金Qing Lan Project,Jiangsu,ChinaPriority Academic Program Development of Jiangsu Higher Education Institutions,China
文摘In order to enhance the water repellence property of cotton fabric, cotton fabric was grafted using hexafluorobutyl methacrylate( HFMT) monomer via atom transfer radical polymerization( ATRP) method. Water repellent cotton fabric was successfully prepared, and characterized by scanning electron microscopy( SEM),Fourier transform infrared spectroscopy( FTIR), and X-ray photoelectron spectroscopy( XPS). The SEM images of the HFMT-treated cotton displayed significant difference from the untreated one. FT-IR characterization of the HFMTtreated cotton indicated that HFMT was successfully grafted onto the surface of the cotton fabric. XPS analysis indicated that the fluorine element of the HFMT-treated cotton existing on the surface of the cotton fabric. The surface contact angle test as well as the water repellence rating test showed that the water repellence of the HFMTtreated cotton fabric was much better than that of the untreated cotton fabric. The surface contact angle of the HFMT-treated cotton fabric could reach( 132. 4 ± 2. 2) °,and the water repellence rating could achieve grade 3. The washing durability of the HFMT-treated fabric was also investigated. The surface contact angle of the HFMTtreated cotton fabric could reach( 121. 1 ± 2. 1) ° after 20 washing times. Furthermore, the whiteness, air permeability, breaking strength,and breaking elongation of the HFMT-treated cotton fabric decreased slightly compared with the untreated cotton fabric.Finally,cotton fabric with good water repellence property and excellent washing durability could be obtained with little effect on the intrinsic properties of cotton fabric.
