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| Dissolution Inhibition of Calcium Sulfate Whisker and Its Application as the Filler in Papermaking |
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| DOI：10.11980/j.issn.0254-508X.2013.08.005 |
| Key Words:calcium sulfate whisker water resistance solubility retention rate |
| Fund Project:本课题为上海市科学技术委员会项目(11HX1188500)。 |
| Author Name | Affiliation | | 张 迎1 | 1.上海大学理学院化学系, 上海,200444 | | 冯 欣2 | 2.上海大学纳米科学与技术研究中心,上海,200444 | | 王钢领2 | 2.上海大学纳米科学与技术研究中心,上海,200444 | | 施利毅1,2 | 1.上海大学理学院化学系, 上海,200444；2.上海大学纳米科学与技术研究中心,上海,200444 |
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| Abstract:Due to its slight solubility in water, calcium sulfate whisker (CSW) utilized as a the filler in papermaking usually results in its low retention. Different modifiers were used to improve the water resistance of CSW by surface coating. The dissolution inhibition effect of CSW and mechanical properties of the paper filling with CSW were investigated based on the characterization of the solubility, surface properties, and chemical composition of CSW before and after modification. The results indicated that the dissolution of CSW was inhibited with different modifiers, and sodium hexametaphosphate (SHMP) was the most effective chemical in surface modification of CSW according to conductivity test. The existence of Na and P elements in CSW surface was detected from EDS and XPS spectra. CSW with high water resistance was modified at 70℃ using 20 mg/L SHMP. The effects of the modified CSW on the mechanical properties of the handsheets were studied, and the retention of the modified CSW was 2.6~3 times higher than that of unmodified CSW. |
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