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| Study on Spontaneous Imbibition of Paper Coating Materials Prepared with Ground Calcium Carbonate |
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| DOI：10.11980/j.issn.0254-508X.2015.10.005 |
| Key Words:paper-based coating materials ground calcium carbonate (GCC) Lucas-Washburn model imbibition characteristy |
| Fund Project:国家自然科学基金资助项目 (51402180)；陕西教育厅科研计划项目(14JK1108)；陕西省留学人员科技活动项目(［2014］1059)；陕西科技大学科研启动基金项目( BJ15-11)；大学生创新创业训练计划项目(1187);制浆造纸工程国家重点实验室开放基金资助项目（201507）。 |
| Author Name | Affiliation | | 刘国栋1,2 | 1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021；2.华南理工大学制浆造纸工程国家重点实验室，广东广州，510640 | | 成囡囡1 | 1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021 | | 张美云1 | 1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021 | | Gane Patrick3,4 | 3.芬兰阿尔托大学,林产品技术系,芬兰Espoo,00076；4.瑞士Omya公司,瑞士Oftringen,CH-4665 | | Rigdway Cathy4 | 4.瑞士Omya公司,瑞士Oftringen,CH-4665 |
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| Abstract:Aiming at the spontaneous imbibition features of paper coating materials prepared with ground calcium carbonate (GCC) and the classical Lucas-Washburn (LW) imbibition model, the imbibition characteristics of paper coating materials was measured and disclosed by a gravimetric test method. The experimental results showed that although there was a linear relationship between the imbibitions amount and the imbibition root time, a separated imbibition phenomenon (two separated imbibition rate at different stages) was also shown sufficiently which contradicted with LW imbibition mechanism. Therefore, the classical LW imbibition theory still had some limitations to explain the imbibition characteristics of paper coating materials. According to the separated imbibitions phenomenon, the experimental results were further explained by considering the wetting behavior on roughness surface and a smooth effect of liquid film arising from capillary condensation. And the essence reason for this physical separated imbibition was also explored and discussed finally. Hence, the roughness surface and pore wall rugosity should be considered as one of important factors when developing a novel coating material with specialty imbibition performance. |
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