Study on Synthesis and Application of Superplasticizer from Chitosan

Abstract:

Sulfonated chitosan (SCS) was prepared from chitosan and sulfuric acid via sulfation reaction. SCS was used as superplasticizer in cement. The test showed that the maximum fluidity of the cement paste was 232 mm with dosage of 0.75 wt % at water to cement ratio (w/c) of 0.29. Meanwhile, lesser loss of fluidity and slump over 60 mins were observed comparing to naphthalene sulfonated formaldehyde condensates (NSF). A well-distribution of cement particles can be seen from the image of SEM in the sample of mortar prepared by SCS. The water reduce ratio of SCS reach 19.2 %. The applied results showed that SCS could slightly improve the mechanical properties of mortar. The paste fluidity, mechanical properties and slump loss of the cement paste incorporated SCS indicated that it can be used as superplasticizer in concrete.

• Periodical: Advanced Materials Research (Volumes 430-432)
• Pages: 1207-1210
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.430-432.1207
• Online since: January 2012
• Authors: Sheng Hua Lv, Jian Ping Duan, Rui Jun Gao, Qiang Cao
• Keywords: Cement, Chitosan, Fluidity, Sulfonation, Superplasticizer

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