氧化石墨烯/水性聚氨酯复合薄膜的制备及性能研究

Study on preparation and properties of graphene oxide/waterborne polyurethane composite films

以自制的GO(氧化石墨烯)为填料,WPU(水性聚氨酯)为基体,采用溶液共混和流延成膜法制备了GO/WPU复合薄膜。着重考察了GO含量对GO/WPU复合薄膜力学性能和导热性能等影响。研究结果表明:随着GO含量的增加,复合薄膜的拉伸强度增强、导热系数增大;当w(GO)=4%(相对于复合薄膜质量而言)时,复合薄膜的拉伸强度(20.6 MPa)相对最大、导热系数[为0.208 W/(m·K)]相对最高[这是由于GO均匀分散在PU(聚氨酯)基体中,形成了连续褶皱状网络结构的缘故]。

With self-made GO （ graphene oxide ） as filler, WPU （ waterborne polyurethane ） as matrix, a GO/WPU composite film was prepared by solution blending and curtain coating film-forming methods. The influences of GO contents on the mechanical properties and thermal conductivity of GO/WPU composite films were emphatically investigated. The research results showed that the tensile strength and thermal conductivity of composite film were increased with increasing GO content. The composite film had the relatively maximal tensile strength （20.6 MPa） and thermal conductivity[0.208 W/（m. K）] whenmass fraction of GO was 4% in composite film. This is because GO is uniformly dispersed in PU （polyurethane） matrix, which could form a continuous fold network structure.