| Measurement of surface crystallinity of PAA and PAANa coatings and its effect on hydrophilicity of coatings |
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| 作者姓名： | 潘春跃 刘清泉 徐先华 陈振华 |
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| 作者单位： | School of Chemistry and Chemical Engineering，School of Chemistry and Chemical Engineering，School of Chemistry and Chemical Engineering，School of Materials Science and Engineering Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Hunan University，Changsha 410082，China |
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| 摘 要： | 1 INTRODUCTIONAsanimportantwater solublemacromoleculecompound,poly (acrylicacid) (PAA)anditssaltshavebeenwidelyused1] .Utilizingitsfinefilm form ingcapacityandhydrophilicity ,Okoroaforetal2 ] ,andPanetal3] developedanewhydrophilicpaintforaluminiumfin2 ,3] .Hydrophilic paintforheat ex changerofairconditioningdemandslittlesurfacecon tactangle ,sothatcontinuoushomogeneouswaterfilmcanformeasily ,andcandrainoffcondensedwa teronthesurfaceoffintimely4 6 ] .Hydrophilicityofcoatingsisaffec…
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Measurement of surface crystallinity of PAA and PAANa coatings and its effect on hydrophilicity of coatings |
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| PAN Chun yue ,LIU Qing quan ,XU Xian hua ,CHEN Zhen hua.Measurement of surface crystallinity of PAA and PAANa coatings and its effect on hydrophilicity of coatings[J].Transactions of Nonferrous Metals Society of China,2003,13(4). |
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| Authors: | PAN Chun yue LIU Qing quan XU Xian hua CHEN Zhen hua |
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| Affiliation: | PAN Chun yue 1,LIU Qing quan 1,XU Xian hua 1,CHEN Zhen hua 2 |
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| Abstract: | The solutions of poly(acrylic acid)(PAA), poly(acrylic acid sodium)(PAANa) were coated on aluminium fins by roll coating method. The coatings with different crystallinity were obtained by varying baking time and temperature. Their surface crystallinity and surface tension were measured, and their spreading speed constant and equilibrium contact angle were tested also. The correlation of surface crystallinity, surface tension, spreading speed constant and surface hydrophilicity was discussed. It is demonstrated that surface tension and spreading speed constant increase, while equilibrium contact angle declines with increasing surface crystallinity of coatings, that is to say, the hydrophilicity of coatings is improved with surface crystallinity of coatings increasing. |
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| Keywords: | PAA PAANa surface crystallinity surface tension hydrophilicity spreading speed constant |
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