贮存环境对PE-WPC等离子体处理时效性的影响(Ⅱ)——表面元素分析

Study on ageing of plasma treated Wood/PE composites in different storage environments(Ⅱ)——Surface elemental analysis

利用等离子体处理技术对PE-WPC进行表面处理以改善其胶接性能,将处理后的木塑复合材料分别贮存在真空(室温)、空气(室温)和空气(低温)环境中,利用XPS分析手段,研究了等离子体处理PE-WPC表面元素的变化,以此表征贮存环境对等离子体处理表面时效性的影响。结果表明,随着放置时间的延长,贮存于真空、空气(室温)和低温环境中的等离子体处理PE-WPC表面的C元素相对含量均增加,O元素则相反,O/C值降低。与空气(室温)环境相比,真空和低温环境下等离子体处理PE-WPC表面O/C值降低的幅度减缓。

The surface of wood/PE composites was treated by low-pressure glow discharge of air plasma to improve its adhesion properties. The treated wood/PE composites were stored in vacuum（room temperature）,air（roonl temperature）and air（low temperature）environments,and the transformation of elements on the surface of plasma treated wood/PE composites stored under different environments for various time was studied by XPS analysis,which elaborated the effect of environment on surface ageing of plasma treated material.The results showed that the relative content of element C increased,the relative content of element O decreased,and the O/C value decreased for plasma treated composites stored in vacuum（room temperature）,air （room temperature）and air（low temperature）environments with storage time extended,which demonstrated the decrease of oxygen-containing groups.Compared with air（room temperature）environment,vacuum and low-temperature environments showed a weak surface ageing for plasma treated wood/PE composites.