Shamsuri Ahmad Adlie, Daik Rusli
School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, UKM Bangi 43600, Selangor, Malaysia.
Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, UPM Serdang 43400, Selangor, Malaysia.
Materials (Basel). 2013 Feb 22;6(2):682-698. doi: 10.3390/ma6020682.
An ionic liquid, 1-n-butyl-3-methylimidazolium chloride (BmimCl) was blended with urea at 1:1 mole ratio to create a BmimCl/Urea mixture. The agarose/talc composite films containing the BmimCl/Urea mixture were then acquired through a gelation method. The weight ratio of agarose and talc was fixed at 4:1, while the content of BmimCl/Urea was varied from 0 to 10 wt % relative to the overall weight of the composite films. The tensile stress and modulus results showed the optimum BmimCl/Urea content in the composite film lies at 8 wt %. The talc particles are embedded in the agarose matrix and there are no pullouts for the composite films containing BmimCl/Urea as demonstrated by SEM micrographs. The addition of BmimCl/Urea increased the glass transition temperature of the composite films, however, the thermal decomposition temperature decreased drastically. FTIR and FT-Raman spectra indicated the existence of interaction between agarose and talc, which improves their interfacial adhesion. As a conclusion, a BmimCl/Urea mixture can be utilized as a coupling agent for agarose/talc composite films.
将离子液体1-正丁基-3-甲基咪唑氯盐（BmimCl）与尿素按1:1的摩尔比混合，制得BmimCl/尿素混合物。然后通过凝胶法制备含BmimCl/尿素混合物的琼脂糖/滑石粉复合薄膜。琼脂糖与滑石粉的重量比固定为4:1，而BmimCl/尿素的含量相对于复合薄膜的总重量在0至10 wt%之间变化。拉伸应力和模量结果表明，复合薄膜中BmimCl/尿素的最佳含量为8 wt%。扫描电子显微镜照片显示，滑石颗粒嵌入琼脂糖基质中，含BmimCl/尿素的复合薄膜没有出现颗粒拔出的现象。BmimCl/尿素的加入提高了复合薄膜的玻璃化转变温度，然而，热分解温度急剧下降。傅里叶变换红外光谱（FTIR）和傅里叶变换拉曼光谱表明琼脂糖与滑石粉之间存在相互作用，这改善了它们的界面附着力。综上所述，BmimCl/尿素混合物可作为琼脂糖/滑石粉复合薄膜的偶联剂。
