【作者】 冯见艳； 王学川； 陈小昆； 张鹏； 罗晓民；

【Author】 FENG Jianyan;WANG Xuechuan;CHEN Xiaokun;ZHANG peng;LUO Xiaomin;College of Bioresources Chemistry and Materials Engineering,Shaanxi University of Science and Technology;

【机构】 陕西科技大学轻工科学与工程学院；

【摘要】 以异佛尔酮二异氰酸酯(IPDI)、聚醚多元醇(GE-220)、二羟甲基丙酸(DMPA)和端羟基超支化聚合物为原料,采用丙酮法合成制备超支化水性聚氨酯(HWPU)。添加不同含量的氧化石墨烯(GO),原位接枝法制备一系列GO/HWPU复合材料。通过FT-IR、SEM、XRD和TG对产物结构进行表征,并对复合材料的力学性能、吸水性、耐水解性与抗静电性能进行检测。实验结果表明:GO成功接枝到HWPU分子上,并且增加了树脂的结晶性;与HWPU材料相比,当GO添加量为0.6%时,复合材料的热分解温度提高了48.67℃;拉伸强度和断裂伸长率分别提高了79.31%和28.7%;当GO添加量为1.0%时,复合材料的体积电阻率达到4.75×10~2Ω·cm,降低了4个数量级,说明GO的加入可以较好的改善聚氨酯的电绝缘性,使复合材料具有较好的抗静电效果。更多还原

【Abstract】 Hyperbranched waterborne polyurethane(HWPU) dispersion was synthesized by using acetone basegd isophorone diisocyanate(IPDI),polyether polyols(GE-220),dimethylol propionic acid(DMPA)and terminal hydroxyl hyperbranched polymers as raw materials.A series of GO/HWPU composites were prepared by adding various amounts of graphene oxide(GO) by situ polymerization process.The structure of the product was characterized by FT-IR,SEM,XRD,TG and AFM.And the mechanical properties of film formation,water absorption,hydrolysis resistance and conductivity were detected.The results were as followed:GO were grafted onto HWPU molecular.Crystalline resin was increased after GO added.When the mount of GO added is 0.6%,the thermal decomposition temperature of the pure HWPU film increased48.67 ℃ and tensile strength and elongation at break increased 79.31 and 28.7%respectively.When the mount of GO added is 1.0%,the volume resistivity of the composite film reached 4.75×10~8 Ω·cm.Compared with the pure HWPU film,the four orders of magnitude reduced.It showed that the addition of Go can improve the polyurethane electrical insulation and good antistatic effect of composite materials.更多还原