Due to the hydrophobic nature and high gravimetric density, it is very difficult to obtain water dispersible polytetrafluoroethylene (PTFE). In this work, high hydrophilic PTFE microparticle was successfully prepared by grafting poly(acrylic acid) MAA and BA onto the surface of PTFE micropowder via an in-situ polymerization of melamine formaldehyde resin (MFR) coating processing method. The functional groups and surface microstructures of the MFR/acrylate modified PTFE micropowder were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Scanning electron microscopy (SEM), the hydrophilic performance was characterized by water contact angle measurement. The results revealed that the hydrophilicity of the PTFE micropowder was greatly enhanced by grafting of the MFR/acrylate complex systems, and the contact angle decreased from 132.8° for pristine PTFE to 73.2° for sample of MFR₁PTFE₆₀MAA₅BA_2.5. The obtained micropowder could be well dispersed in water to form homogeneous suspension with high stability. Compared with the other methods to improve the hydrophilicity of PTFE microparticle, furthermore, this microcapsule grafting method is more convenient and efficient, which could promote the application of PTFE micropowder in waterborne coating fields.

由于疏水性和高重量密度，很难获得水分散性聚四氟乙烯（PTFE）。在这项工作中，通过三聚氰胺甲醛树脂（MFR）涂层加工方法的原位聚合，将聚（丙烯酸）MAA和BA接枝到聚四氟乙烯微粉表面，成功制备了高亲水性聚四氟乙烯微粒。通过傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）对MFR/丙烯酸酯改性聚四氟乙烯微粉的官能团和表面微观结构进行表征，亲水性能通过水接触表征角度测量。结果表明，MFR/丙烯酸酯复合体系的接枝大大提高了PTFE微粉的亲水性，₁聚四氟乙烯₆₀ MAA ₅ BA _2.5。所得微粉在水中能很好地分散，形成均匀的悬浮液，稳定性高。与其他提高聚四氟乙烯微粉亲水性的方法相比，这种微胶囊接枝方法更加方便、高效，可促进聚四氟乙烯微粉在水性涂料领域的应用。