Yang Xianrong, Shuai Huan, Du Gaoxiang, Wang Jiao, Shen Jie
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
Beijing Yiyi Star Technology Co., Ltd., Beijing 100089, China.
Polymers (Basel). 2024 Dec 30;17(1):67. doi: 10.3390/polym17010067.
In this study, waterborne polyurethane (WPU), a novel modifier, was used for the wet surface modification of talc, and its mechanism was investigated. Polypropylene (PP)-based composites with modified talc were synthesized and subjected to an examination of their mechanical properties. The wetting contact angle demonstrated that the modified talc exhibited an excellent modification effect at a specific amount of modifier (2.0 wt.%). The X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS) results indicated the successful coating of WPU on the surface of the talc particles. SEM images revealed that modified talc displayed improved wettability, compatibility, and dispersion in PP/talc + WPU composites. The mechanical properties results showed that the PP/talc + WPU composites ensured superior comprehensive properties with a flexural strength of 55.9 MPa, impact strength of 4.72 kJ/m, tensile strength of 34.8 MPa, and elongation of breaks of 32.4%. The incorporation of WPU-modified talc into plastic materials has been synthesized to leverage its beneficial properties, leading to reduced production costs and improved performance and functionality of the final product.
在本研究中，新型改性剂水性聚氨酯（WPU）用于滑石粉的湿表面改性，并对其机理进行了研究。合成了含有改性滑石粉的聚丙烯（PP）基复合材料，并对其力学性能进行了测试。润湿性接触角表明，在特定量的改性剂（2.0 wt.%）下，改性滑石粉表现出优异的改性效果。X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）结果表明WPU成功包覆在滑石粉颗粒表面。扫描电子显微镜（SEM）图像显示，改性滑石粉在PP/滑石粉+WPU复合材料中表现出改善的润湿性、相容性和分散性。力学性能测试结果表明，PP/滑石粉+WPU复合材料具有优异的综合性能，弯曲强度为55.9 MPa，冲击强度为4.72 kJ/m，拉伸强度为34.8 MPa，断裂伸长率为32.4%。合成了将WPU改性滑石粉掺入塑料材料的方法，以利用其有益特性，从而降低生产成本并提高最终产品的性能和功能。
