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Preparation and physical properties of chitosan-coated calcium sulphate whiskers

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Abstract

To improve the performance of calcium sulphate whiskers (CSWs) in the papermaking industry, a series of chitosan-coated (CS) calcium sulphate whiskers (CS-CSWs) was prepared, with the aim of effectively reducing their solubility in aqueous solutions. The CS-CSWs were prepared by immersing CSWs in a chitosan acid solution and then cross-linking with alkaline gel via hydrogen-bonding interaction. The CS-CSWs were characterised in terms of water solubility, zeta potential, contact angle, scanning electron microscopy, thermo gravimetric analysis and X-ray photoelectron spectroscopy (XPS). The results indicated that chitosan had a good effect on the surface modification of CSWs. Under optimal conditions, the water solubility of CS-CSWs decreased by 50 %, and the contact angle increased by 63 %. The XPS measurement indicated that the relative thickness of the chitosan coating was 9.8 nm.

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Authors and Affiliations

  1. East China University of Science and Technology, No.130 Meilong Road, Shanghai, 200237, China

    Qing Jiang, Yun Cheng, Xiu-Ying Cao, Rui Wei & Min Zhao

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  1. Qing Jiang
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  2. Yun Cheng
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  3. Xiu-Ying Cao
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  4. Rui Wei
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  5. Min Zhao
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Correspondence to Min Zhao.

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Jiang, Q., Cheng, Y., Cao, XY. et al. Preparation and physical properties of chitosan-coated calcium sulphate whiskers. Chem. Pap. 68, 1400–1407 (2014). https://doi.org/10.2478/s11696-014-0579-x

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