| 梁虎南,龙 柱,杨淑蕙.酸化膨润土对纸张涂料流变性能的影响[J].中国造纸学报,2013,28(4):38-42 |
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| 酸化膨润土对纸张涂料流变性能的影响 |
| Effect of Acid-activated Bentonite on Rheological Properties of Paper Coatings |
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| DOI： |
| 中文关键词: 酸化膨润土 纸张涂料 流变性能 |
| Key Words:acid-activated bentonite paper coating rheological property |
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| 中文摘要: |
| 研究了酸化膨润土对纸张涂料流变性能的影响。结果表明，添加酸化膨润土，涂料黏度明显降低。在低剪切速率下，除了酸化膨润土用量为40份（以颜料总量100份计）的涂料表现出胀流型流体的特征外，酸化膨润土用量低于40份的涂料均表现出剪切稀化的假塑性流体特征；在高剪切速率下，纸张涂料均表现出假塑性流体的特征。纸张涂料动态频率扫描显示，涂料的黏弹性随酸化膨润土用量的增加而降低；除了酸化膨润土用量40份的纸张涂料在高频区的相位角大于45°外，其他涂料的相位角均小于45°，涂料表现出弹性大于黏性的特征。 |
| Abstract: |
| Effect of acid-activated bentonite on the rheological properties of paper coatings was studied. The results showed that the viscosity of the coatings decreased by adding acid-activated bentonite. At low shear rate, except the coatings containing 40% acid-activated bentonite which showed dilatant flow behavior, the paper coatings exhibited the behavior of pseudoplastic fluid, characterized as shear thinning. The flow properties of paper coatings at high shear rate were pseudoplastic fluid. The results obtained from dynamic viscoelasticity experiment revealed that the dynamic elastic storage modulus and viscid loss modulus of paper coatings decreased with increasing acid bentonite content. Except the coatings containing 40% acid-activated bentonite, the phase angle (δ) at high frequency of paper coatings containing acid-activated bentonite was below 45°.In brief, all of paper coatings belonged to a viscoelastic solid. |
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