The polypropylene/glass fiber（PP/GF） composites with excellent antistatic performance and improved mechanical properties have been reported by incorporation of a very small amount of the organic salt, lithium bis（t...The polypropylene/glass fiber（PP/GF） composites with excellent antistatic performance and improved mechanical properties have been reported by incorporation of a very small amount of the organic salt, lithium bis（trifluoromethanesulfonyl）imide（Li-TFSI）, into the PP/GF composites. It was considered that GF could play the role as the pathways for the movements of ions in the ternary composites. In this work, the interactions between Li-TFSI and glass fiber and the effects of such interactions on the physical properties of the composites have been systematically investigated. Three types of glass fibers with different ―OH group concentrations have been prepared in order to compare the interactions between GF and Li-TFSI. It was found that the ―OH group concentrations on the surface of glass fiber have significant effects on interactions between glass fibers and Li-TFSI. Such interactions are crucial for both the antistatic and mechanical performances of the final PP/GF/Li-TFSI composites. The investigation indicated that the GF with high ―OH group concentrations confined the movement of TFSI-, which decreased the antistatic properties of PP/GF/Li-TFSI composites. On the other hand, the GF with low ―OH group concentrations inhibited the absorption of Li-TFSI onto the GF, which also hindered the formation of Li-TFSI conductive pathway. The best antistatic performance of the ternary composites can be achieved at the intermediate ―OH concentrations on the GF.展开更多
We employed oxygen plasma treatment to activate the PTFE surface and introduce oxygencontaining polar groups(-OH,C-O,C=O),thereby enhancing surface energy and interfacial reactivity.We subsequently composited the modi...We employed oxygen plasma treatment to activate the PTFE surface and introduce oxygencontaining polar groups(-OH,C-O,C=O),thereby enhancing surface energy and interfacial reactivity.We subsequently composited the modified PTFE(PTFE-O)with graphene oxide(GO),enabling tight interactions between the two phases through hydrogen bonding and van der Waals forces.Comprehensive characterizations,including XPS,FTIR,SEM,and contact angle analysis,confirmed the successful surface modification and uniform dispersion of GO.The optimized PTFE-O/GO composite exhibits a low resistivity of 2.41×10^(3)Ω·cm under a compression pressure of 2 MPa,demonstrating markedly improved conductivity and antistatic performance.These findings provide an effective route for constructing conductive PTFE-based composites and offer new insights into interface-engineered antistatic polymer materials.展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.21674033 and 51173036)
文摘The polypropylene/glass fiber（PP/GF） composites with excellent antistatic performance and improved mechanical properties have been reported by incorporation of a very small amount of the organic salt, lithium bis（trifluoromethanesulfonyl）imide（Li-TFSI）, into the PP/GF composites. It was considered that GF could play the role as the pathways for the movements of ions in the ternary composites. In this work, the interactions between Li-TFSI and glass fiber and the effects of such interactions on the physical properties of the composites have been systematically investigated. Three types of glass fibers with different ―OH group concentrations have been prepared in order to compare the interactions between GF and Li-TFSI. It was found that the ―OH group concentrations on the surface of glass fiber have significant effects on interactions between glass fibers and Li-TFSI. Such interactions are crucial for both the antistatic and mechanical performances of the final PP/GF/Li-TFSI composites. The investigation indicated that the GF with high ―OH group concentrations confined the movement of TFSI-, which decreased the antistatic properties of PP/GF/Li-TFSI composites. On the other hand, the GF with low ―OH group concentrations inhibited the absorption of Li-TFSI onto the GF, which also hindered the formation of Li-TFSI conductive pathway. The best antistatic performance of the ternary composites can be achieved at the intermediate ―OH concentrations on the GF.
基金Funded by the Key Scientific and Technological Project of Zhejiang Provincial Administration for Market Regulation(No.ZD2024004)the National Natural Science Foundation of China(Nos.62304214 and 62304213)+2 种基金the Natural Science Foundation of Zhejiang Province(No.LQ23E020006)the Chunhui Project Foun-dation of the Education Department of China(No.HZKY20220198)the Fundamental Research Funds for the Provincial Universities of Zhejiang(Nos.2021YW35,2021YW36 and 2022YW62)。
文摘We employed oxygen plasma treatment to activate the PTFE surface and introduce oxygencontaining polar groups(-OH,C-O,C=O),thereby enhancing surface energy and interfacial reactivity.We subsequently composited the modified PTFE(PTFE-O)with graphene oxide(GO),enabling tight interactions between the two phases through hydrogen bonding and van der Waals forces.Comprehensive characterizations,including XPS,FTIR,SEM,and contact angle analysis,confirmed the successful surface modification and uniform dispersion of GO.The optimized PTFE-O/GO composite exhibits a low resistivity of 2.41×10^(3)Ω·cm under a compression pressure of 2 MPa,demonstrating markedly improved conductivity and antistatic performance.These findings provide an effective route for constructing conductive PTFE-based composites and offer new insights into interface-engineered antistatic polymer materials.
