Application of cellulose sulfoacetate obtained from sugarcane bagasse as an additive in mortars

作者：Nascimento Barbara; Rodrigues Filho Guimes; Frigoni Elaine Selaro; Soares Heline Mendes; Meireles Carla da Silva; Cerqueira Daniel Alves; Monteiro Valente Artur Jose; Carvalho Rui de Albuquerque; Nascimento de Assuncao Rosana Maria; de Castro Motta Leila Aparecida

来源：Journal of Applied Polymer Science, 2012, 124(1): 510-517.

DOI：10.1002/app.34881

• additives
• biodegradable
• water-soluble polymers

In this study, cellulose sulfoacetate (CSA) was produced with cellulose extracted from sugarcane bagasse with sulfuric acid as a catalyst under homogenous conditions so that the derivative could be applied as an additive for mortar of Portland (Cimento Portland de alta resistencia inicial, CPV-ARI) cement. The IR spectra showed that only precipitate C presented the characteristic band of sulfate groups (807 cm(-1)) and was, therefore, the sulfoacetylated derivative. CSA presented a degree of acetylation of 2.70 and a degree of sulfonation of 0.063, and the presence of sulfate groups in the derivative displaced the position of C(6) to a lower field in the C-13-NMR spectrum and influenced reduced viscosity as a function of concentration. The evaluation of CSA as an additive showed that for a polymer/cement ratio of 0.6%, an increase of 13.80% was achieved consistently, and an increase of 21.05% in the potential tensile of adhesion strength was also achieved.

• 出版日期2012-4-5