Ni-P-PTFE化学复合镀层的导热及阻垢性能研究

Investigation on the Thermal Conductivity and Anti-fouling Property of Ni-P-PTFE Electroless Composite Coating

以T2铜片作基体进行Ni-P-PTFE化学复合镀实验,获得了相同镀层厚度的Ni-P-PTFE复合镀层试件,测量试件的导热系数。结果表明:在相同厚度下,Ni-P-PTFE复合镀层试件的整体导热系数主要受镀层中碳(C)、磷(P)和聚四氟乙烯(PTFE)成分含量的影响。试件的整体导热系数相比铜的导热系数有所降低,但不超过4.5%,依然保持高导热性能。由正交试验得到优化工艺,由此工艺获得的Ni-P-PTFE化学复合镀层的表面接触角为123.4°,表面能为9.9mN/m。阻垢测试结果显示,相比铜表面,沉积在Ni-P-PTFE镀层表面的碳酸钙晶体数量与尺寸均有明显的减小。总的来说,Ni-P-PTFE镀层对材料的导热能力影响较小,却能有效地减缓水垢的沉积与聚集,起到阻垢的作用。

Ni-P-PTFE electroless composite coating which have the same thickness are got by electroles corn posite plating on T2 copper sheets, and the thermal conductivity is tested. The result shows that, the total thermal con ductivity is mainly affected by the C,P and PTFE content of the Ni-P-PTFE electroless composite coating which have the same thickness. Compared with the copper sheets, the thermal conductivity decreased, but not exceeds 4%, which still have a high thermal conduction. Experimental is optimized by orthogonal process, and in this condition ,the contact angel of Ni-P-PTFEelectroless composite coating is 123.4°,mean while the surface free energy is 9.9 mN/m. The result of anti fouling tests show that, the number and size of calcum carbonate crystals increased after Ni P PTFE electroless plating. In general, the Ni-P-PTFE coatings affect the thermal conductivity of the material slightly, and show an excellent anti-fouling capacity by slow scale deposition and accumulation.