| 接触角法测量马来海松酸改性双组分水性聚氨酯的表面能 |
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| 引用本文： | 司红燕,商士斌,刘鹤,王丹,廖圣良,宋湛谦.接触角法测量马来海松酸改性双组分水性聚氨酯的表面能[J].林产化学与工业,2016(2):1-8. |
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| 作者姓名： | 司红燕 商士斌 刘鹤 王丹 廖圣良 宋湛谦 |
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| 作者单位： | 中国林业科学研究院 林产化学工业研究所 生物质化学利用国家工程实验室 国家林业局 林产化学工程重点开放性实验室 江苏省 生物质能源与材料重点实验室,江苏 南京,210042 |
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| 基金项目： | 国家自然科学基金云南联合基金项目(U1202265) |
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| 摘 要： | 将亲水改性的多异氰酸酯分别与马来海松酸改性聚酯多元醇(MPP)、聚酯多元醇(PP)和Bayhydrol D270聚酯多元醇水分散体进行复合交联制得MPP-2K-WPU、PP-2K-WPU和D270-2K-WPU,并采用FT-IR和DSC对产物进行表征。利用接触角法研究了n(—NCO)∶n(—OH)及多元醇组分种类对2K-WPU涂膜接触角、表面能和耐水性的影响,并采用Equation of State法和Owens-Wendt-Rabel-Kaelble法对试验数据进行分析。结果表明,与甲酰胺系列(甲酰胺、甲酰胺-二碘甲烷)检测液体相比,水系列(水、水-二碘甲烷)检测液体能更好地对2K-WPU涂膜表面性能进行描述;随着n(—NCO)∶n(—OH)的增加,MPP-2K-WPU的表面能先减小后增大,耐水性呈现先增强后减弱的趋势,当n(—NCO)∶n(—OH)为1.5∶1时其表面能最小、耐水性最强;与2种对照样(PP-2KWPU和D270-2K-WPU)相比,MPP-2K-WPU的表面能最小且耐水性最强。
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| 关 键 词： | 马来海松酸 双组分水性聚氨酯 接触角法 表面能 耐水性 |
Evaluation of Surface Free Energy of Maleopimaric Anhydride Modified 2 K-WPU by Contact Angle Goniometry |
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| Abstract: | MPP-2K-WPU, PP-2K-WPU and D270-2K-WPU were prepared by crosslinking of hydrophilic-modified polyisocyanate with maleopimaric acid modified polyester polyol ( MPP) , polyester polyol ( PP) and Bayhydrol D270 polyester polyol dispersion, respectively. The products were characterized by FT-IR and DSC. The influences of n(—NCO)∶n(—OH) and type of polyol component on contact angle, surface free energy and water resistance of 2K-WPU films were investigated. The experimental data were analyzed using Equation of State method and Owens-Wendt-Rabel-Kaelble method. The results showed that water series test liquid (water, water-diiodomethane) was better to describe the surface properties of 2K-WPU, if it was compared with formamide series test liquid ( formamide, formamide-diiodomethane) . With increasing of n(—NCO)∶n(—OH) , the surface free energy of MPP-2K-WPU decreased firstly and then increased, and the water resistance increased firstly and then decreased. MPP-2K-WPU exhibited the minimum surface free energy and the strongest water resistance when the n(—NCO)∶ n(—OH) was 1. 5∶1. Compared with two kinds of control samples (PP-2K-WPU and D270-2K-WPU), the surface free energy of MPP-2K-WPU was the minimum, and its water resistance was the best. |
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| Keywords: | maleopimaric anhydride 2K-WPU contact angle goniometry surface free energy water resistance |
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