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Preparation of hydrophobically modified cotton filter fabric with high hydrophobic stability using ARGET-ATRP mechanism

机译:使用ARGET-ATRP机构制备具有高疏水性稳定性的疏水性改性棉织物

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This paper reports on the hydrophobic modification of cotton fabric grafted with 1-octadecene via an activators regenerated by electron transfer (ARGET) atom transfer radical polymerization (ATRP) mechanism. Particularly, the activation treatment of raw cotton fabric, its influence on the graft-copolymerization by the ARGET-ATRP method, along with the super-hydrophobicity and hydrophobic stability of the modified cotton fabric are discussed. Furthermore, the microstructure and elemental variation were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and the energy dispersion spectrum (EDS) technique. The results show that chemical activation of the raw cotton fabric can significantly improve the follow-up hydrophobic modification process. Specifically, the contact angle of the hydrophobically modified cotton fabric increased to 145 degrees after activation, and thus, this fabric presents more stable hydrophobicity (corresponding to a 5.5% contact angle attenuation) than a non-activated fabric. The hydrophobic modification reaction was carried out using a chemically optimum stoichiometric ratio of m(CuBr2) : m(C9H23N3) : m(C2H5OH) : m(C18H36) : m(C6H8O6) = 0.015 : 0.052 : 17.9 : 2.4 : 0.05, at a temperature of 30-55 degrees C over 8 h. Furthermore, the SEM and AFM images revealed that more copolymer micro/nano-level particles were present on the surface of the fibers of the hydrophobically modified cotton fabric, indicating that the hydrophobic property and stability of the cotton fabric increase with the grafting density on the cotton fabric.
机译:本上的经由通过电子转移(ARGET)原子转移自由基聚合(ATRP)机构再生的活化剂与1-十八碳烯接枝的棉织物的疏水改性纸报告。特别是,原棉织物的活化处理,其对由所述ARGET-ATRP法的接枝共聚的影响,与修改后的棉织物的超疏水性和疏水性的稳定性沿进行了讨论。此外,微结构和元素的变化是由扫描电子显微镜(SEM),原子力显微镜(AFM),X射线光电子能谱(XPS),能量分散光谱(EDS)技术来表征。结果表明,原料棉织物的化学活化可以显著提高后续疏水改性过程。具体而言,疏水改性的棉织物的接触角活化后增加至145度,因此,这种织物表现出比未活化的织物更稳定的疏水性(对应于5.5%的接触角衰减)。疏水改性反应进行了使用米(的CuBr 2)的化学最佳化学计量比:M(C9H23N3):M(C2H5OH):M(C18H36):M(C6H8O6)= 0.015:0.052:17.9:2.4:0.05,在的30-55摄氏度以上8小时的温度。此外,SEM和AFM图像显示,更共聚物微/纳米级粒子存在的疏水改性的棉织物的纤维的表面上,表明疏水性和稳定性上的接枝密度棉织物增加棉织物。

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    《RSC Advances》 |2019年第43期|共11页
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  • 正文语种 eng
  • 中图分类 化学;
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