Synthesis and Application of an Anionic Poly-Carboxylate Dispersant for Kaolin Slurry

Abstract:

A water-soluble graft copolymer, which was used to improve the dispersion properties of kaolin slurry with high solid content , was synthesized from sodium humate (HA), acrylic acid (AA), starch (St) and potassium persulfate (KPS) by aqueous solution polymerization. The influence of raw material ratio, dosage of initiator, temperature and reaction time to poly-dispersant properties, which was measured by kaolin slurry viscosity, was studied in detail. It was observed that poly-dispersant prepared in this study exhibited good dispersion properties for kaolin slurry. This is most probably due to high electrostatic repulsion force and steric stability between kaolin particles, which is fully covered by poly-dispersant with suitable molecular weight, molecules contain appropriate side chains and charge density. The optimum conditions are as follows: the mass ratio of St/(AA&HA) is 1:30, the mass ratio of HA/AA is 3:1, and the reaction temperature is 70°C, the dosage of KPS is 7%, reaction time is 2h. It was also observed that viscosity of kaolin slurry was strongly affected by concentrations of Poly(Starch-Acrylic acid-Sodium humate) (P(St-AA-HA)). The optimal content of the poly-dispersant is 0.5%. Fourier transform infrared (FTIR) proved that the product was a graft copolymer of St-AA-HA.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 554-559
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.554
• Online since: September 2013
• Authors: Yu Meng Zheng, Xiao Ran Sun, Guang Yue Li
• Keywords: Acrylic Acid, Kaolin, Poly-Dispersant, Sodium Humate, Starch

References

[1] A.A. Zaman, S. Mathur. J. Colloid Interface Sci., 2004, 271: 124-130.

[2] R. Jewad, C. Bentham, B. Hancock, el at. J. Eur. Ceram. Soc., 2008, 28: 547-553.

[3] P. Ceramics, G. Mera and R. Riedel, G.D. Soraru. J. Am. Ceram. Soc., 2010, 93(7): 1805-1837.

[4] A. Papo, L. Piani, R. Ricceri. Colloids. Surf., 2002, 201: 219-230.

[5] K. Vishista, F. D. Gnanam. Mater. Lett., 2004, 58: 1576-1581.

[6] M. S. Eygi, G. Atesok. Ceram. Int., 2008, 34: 1903-(1908).

[7] Baohua Zhang, Qing Yang, Fei Qian, el at. J Shanghai Univ (Engl Ed), 2009, 13(4): 283-286.

[8] Lung Pin Chen, Hsin Hsuan Wu, Kung-Chung Hsu. J. Appl. Polym. Sci., 2005, 98: 109-115.

[9] Bingyan Jiang, et al. Colloids Surf., A, 2012, 396: 310-316.

[10] S. Farrokhpay. Adv. Colloid Interface Sci., 2009, 151: 24-32.

[11] P. Marco, J. Llorens. Colloids Surf., A, 2005, 291-295.

[12] S. Farrokhpay, G. E. Morris, L. G. Britcher. Miner. Eng., 2012, 39: 39-44.

[13] Anan Wang, Xueqing Qiu, Yuxia Pang, el at. China Ceramics, 2010, 46(9): 38-41. (In Chinese).

[14] Yanli Zhang, Lijun Meng, Licong Meng. China Ceramics, 2010, 4: 65-68. (In Chinese).

[15] M. Loginov, O. Larue, N. Lebovka, el at. Colloids Surf., A, 2008, 325: 64-71.

[16] N. Traiphol, R. Suntako, K. Chanthornthip. Ceramics International, 2010, 36: 2147-2153.

DOI: 10.1016/j.ceramint.2010.05.018

[17] Yee-Kwong Leong, Jeremy Teo, Ejen Teh, el at. Chem. Eng. Res. Des., 2012, 90: 658-666.

[18] T. Kakui, T. Miyauchi, H. Kamiya. J. Eur. Ceram. Soc., 2005, 25: 655-661.

[19] Junfeng Zhu, Guanghua Zhang, Junguo Li, el at. Colloids Surf., A, 2013, 422: 165-171.

[20] Wenzhong Cao, Lei Wang, Weiwei Wang, Zhong Hong. Journal of Nanchang University (Engineering &Technology), 2012, 34(3): 216-219. (In Chinese).

[21] Yian Zheng, Shuibo Hua, Aiqin Wang. Desalination, 2010, 263: 170-175.

[22] Jianmei Zhang, Gang Li, Fang Yang, el at. Appl. Surf. Sci., 2012, 259: 774-779.

[23] Guanghua Zhang, Long Liu, Wenjing Han, el at. Coal Science and Technology, 2012, 40(7): 120-124. (In Chinese).

[24] Mifeng Chen, Linhui Zhu, Yan Ji. Chemical World, 2001, 3: 153-156. (In Chinese).

[25] R. Suntako, P. Laoratanakul, N. Traiphol. Ceram. Int., 2009, 35: 1227-1233.