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K 2 Ti 6 O 13 whisker was modified with n ‐octadecyltrichlorosilane (OTS), fluorosurfactant (FSK), and silane coupling agent (KH‐550), respectively. The surface energy of K 2 Ti 6 O 13 whisker was calculated based on Van Oss‐Chaudhury‐Good function. Then the influence of surface modification on the tribological and mechanical properties of K 2 Ti 6 O 13 whisker filled polytetrafluoroethylene (PTFE) composites was studied. Surface energy calculation shows that the surface energy of OTS‐treated K 2 Ti 6 O 13 whisker is only 29.0 mJ/m 2 , which is the closest to the value of pure PTFE. Among all samples, the PTFE composite filled with OTS‐treated K 2 Ti 6 O 13 whisker shows the best antiwear property, tensile strength, and impact strength, which is about 19 to 33%, 15 and 55% higher than that of untreated K 2 Ti 6 O 13 whisker filled PTFE, respectively.
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Shi et al. (2011) studied this question.
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