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以十二烷基苯磺酸钠(SDBS)为抗静电剂,将其加入到具有核壳结构的高密度聚乙烯(HDPE)木塑复合材料中,以减小壳层HDPE的静电效应。采用超高电阻测量仪、万能力学试验机、表面接触角测试仪以及差示扫描量热仪对样品进行电学、力学、表面润湿性以及热力学分析。结果表明:未添加SDBS的核壳结构木塑复合材料的表面电阻率为10~(15)Ω;添加18%的SDBS后,木塑复合材料的表面电阻率降至10~8Ω。添加SDBS后,木塑复合材料的力学性能先上升后下降,弯曲强度较最高值下降约3.67%,弯曲模量较最高值下降约9.92%,冲击强度较最高值下降约10.20%。复合材料表面润湿性随着壳层SDBS含量的增加而降低,壳层结构HDPE基体结晶度则先降低后提高。
Using sodium dodecyl benzene sulfonate (SDBS) as antistatic agent, it was added to high density polyethylene (HDPE) wood - plastic composites with core - shell structure to reduce the electrostatic effect of shell HDPE. The samples were subjected to electrical, mechanical, surface wettability and thermodynamic analysis using an ultra-high resistance meter, a universal mechanics tester, a surface contact angle tester and a differential scanning calorimeter. The results show that the surface resistivity of the core-shell wood-plastic composites without SDBS is 10 ~ (15) Ω, and the surface resistivity of the wood-plastic composites is reduced to 10 ~ 8Ω with 18% SDBS. After adding SDBS, the mechanical properties of wood-plastic composites first increased and then decreased, the flexural strength decreased by about 3.67% from the highest value, the flexural modulus decreased by about 9.92% and the impact strength decreased by about 10.20% from the highest value. The wettability of the composites decreased with the increase of the content of SDBS in the shell, while the crystallinity of the HDPE matrix in the shell decreased first and then increased.