Abstract：The sulfonic groups bagasse xylan phthalate was synthesized by two steps of esterification using bagasse xylan as the raw material. The effects of reaction conditions were investigated and the optimal conditions were obtained. The samples were characterized by infrared spectroscopy(FT-IR), X-ray diffraction (XRD), thermal gravimetric analysis (TG-DTG) and scanning electron microscopy (SEM) before and after double esterification of the bagasse xylan. The single active bagasse xylan phthalate was synthesized in the first step by catalytic esterification with phthalic anhydride as carboxylic acid esterification agent and triethylamine as the catalyst with the volume ratio of triethylamine to DMF 1:16, the molar ratio of bagasse xylan unit to phthalic anhydride 1:2, the reaction temperature 80 ℃ and the reaction time 4 h. The dual active sulfonic groups bagasse xylan phthalate was synthesized in the second step under alkaline conditions using sodium nitrilotriacetic sulfonate as the sulfonation agent with the mass ratio of bagasse xylan to NaNO2 1:2, the reaction temperature 50 ℃ and reaction time 4 h. The characterization results showed that the thermal stability of sulfonic groups bagasse xylan phthalate was enhanced, and the molecular surface morphology of the dual esterified derivative showed more closely.
Li Heping,Wu Guanya,Yang Xu et al. Synthesis and Characterization of Dual Active Sulfonic Groups Bagasse Xylan Phthalate[J]. 化学反应工程与工艺, 2016, 32(2): 144-151.
