| 摘要: |
| 采用异氰酸酯对聚乙烯木塑复合材料进行表面涂覆处理，利用接触角测试、扫描电子显微镜（SEM）、傅里叶变换红外光谱仪（FTIR）、X射线光电子能谱仪（XPS）以及胶接强度测试等方法对处理后聚乙烯木塑复合材料的表面性质与胶接性能进行了表征.结果表明：经打磨并用异氰酸酯涂覆处理后，材料表面的粗糙度增加，表面润湿性得以改善；且材料表面的O元素含量相对增加，表面出现OH，CO和OC等极性基团，且引入了异氰酸酯的NCO基团.材料表面性质的改变有利于胶黏剂的润湿与胶接，而异氰酸酯基团的引入又能大幅提高丙烯酸酯胶黏剂与材料的胶接强度，从而实现聚乙烯木塑复合材料的快速胶接. |
| 关键词: 聚乙烯木塑复合材料 表面处理 表面涂覆 异氰酸酯 胶接强度 |
| DOI：103969/j.issn1007 9629201601016 |
| 分类号: |
| 基金项目:中央高校基本科研业务费专项资金资助项目（2572015EB01）；黑龙江省哈尔滨市科技创新人才研究专项资金资助项目（2014RFXXJ066） |
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| Surface Coating Treatment with Isocyanate and Bonding for Wood/Polyethylene Composites |
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DI Mingwei, YOU Lai, ZHAO Tingyu, CUI Jiawei
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Key Laboratory of Biobased Material Science and Technology of Ministry of Education,Northeast Forestry University, Harbin 150040, China
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| Abstract: |
| The surface of wood/polyethylene composites was coated with isocyanate to improve its adhesion properties. Contact angle test, scanning electron microscope （SEM）, Fourier transform infrared spectroscopy （FTIR）, X ray photoelectron spectroscopy （XPS） and bonding strength test were used to study the effect of surface treatment with isocyanate on the surface properties and bonding properties of wood/polyethylene composites. The results show that, after surface treatment of sanding and isocyanate coating, the surface roughness for the sample increases, and the surface wettability is improved. The results of FTIR and XPS analysis show that the content of oxygen element increases, and the —OH, —CO and —O—C groups are formed on the surface of the treated composites. After surface treatment of sanding and isocyanate coating, the NCOgroup is introduced on the surface of the composites, which would be of great benefit to the adhesion between acrylate adhesive and wood/polyethylene composites, and to the achievement of fast bonding for wood/polyethylene composites. |
| Key words: wood/polyethylene composite surface treatment surface coating isocyanate bonding strength |
