| 摘要: |
| 将木粉/聚乙烯复合材料进行硅烷偶联剂表面涂覆处理以改善其胶接性能.为探究胶接接头在水环境下的耐久性，利用傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)，研究了水对表面涂覆处理后的木塑复合材料表面性质的影响.结果表明：经表面涂覆处理后，硅烷偶联剂与材料表面形成化学结合；随着水浸时间的延长，表面没有新的化学基团产生，但表面元素的化学环境会发生改变，—OH，CO等基团含量增加，这是复合材料中木粉吸水膨胀所导致的表面粗糙度变化引起的；水浸环境下硅烷偶联剂在材料表面会形成键的形成与断裂的动态平衡，且木粉的吸水膨胀会进一步改变材料的表面性质，这种改变对材料胶接接头的耐久性会产生较大影响. |
| 关键词: 木粉/聚乙烯复合材料 表面处理 硅烷偶联剂 表面性质 耐水性 |
| DOI：10.3969/j.issn.1007 9629.2013.03.017 |
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| Evolvement of Surface Properties for Wood/Polyethylene CompositesTreated by Silicane Coupling Agent under Water Immersion |
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DI Ming wei, WANG Hui
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Key Laboratory of Bio based Material Science and Technology of Ministry of Education, Northeast ForestryUniversity, Harbin 150040, China
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| Abstract: |
| The surface of wood/polyethylene(PE) composites was treated by silicane coupling agent to improve its adhesion properties. To explore the durability of the bonding joint in water， the Fourier transform infrared spectroscopy(FTIR) and X ray photoelectron spectroscopy(XPS) were employed in the water immersion experiment to investigate the effect of water on the surface properties of coating treated wood/PE composites. The results show that there is a chemical combination between silicane coupling agent and the surface of the composite after the coating treatment. With the immersion time extended, the new groups are not formed on the surface for the composite, but the chemical environment for the chemical elements on the surface is changed. The contents of —OH and the CO groups on the surface of wood/PE composites are increased, which is resulted from swelling of wood fiber within wood/PE composite caused by absorbing water. There exists a homeostasis of the bond forming and bond rupturing for silicane coupling agent on the surface of the composite. And the swelling of wood fiber within wood/PE composite caused by absorbing water could result in further changes of surface properties. And the changes would have a considerable effect on the durability of the bonding joint. |
| Key words: wood/PE composite surface treatment silicane coupling agent surface property water resistance |
