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在NaOH/尿素溶解制成的纳米细菌纤维素(NBC)均相溶液中,以丙烯酸(AA)为接枝单体,过硫酸钾为引发剂,N,N’-亚甲基双丙烯酰胺(MBA)为交联剂,通过接枝共聚法制备出高吸水纳米细菌纤维素树脂(SANBCR)。考察了中和度、AA、MBA、K2S2O8用量对吸水率的影响。利用红外光谱(FT-IR)对SANBCR的结构进行了表征。结果表明,高吸水纳米细菌纤维素树脂的最佳制备条件为:中和度为80%,NBC、AA、K2S2O8、MBA的用量分别为1 g、12 mL、0.12 g和0.04 g,制得的SANBCR吸水率高达1 320 g/g,30℃下8 h后保水率95%以上。
In the homogeneous solution of nano-bacterial cellulose (NBC) prepared by dissolving NaOH / urea, acrylic acid (AA) as grafting monomer, potassium persulfate as initiator and N, N’-methylenebisacrylamide MBA) as a cross-linking agent, prepared by graft copolymerization superabsorbent nanobacteria cellulose resin (SANBCR). The effects of neutralization degree, AA, MBA and K2S2O8 dosages on water absorption were investigated. The structure of SANBCR was characterized by FT-IR. The results showed that the optimal preparation conditions of the super absorbent nano-bacterial cellulose resin were as follows: the neutralization degree was 80%, the dosage of NBC, AA, K2S2O8 and MBA were 1 g, 12 mL, 0.12 g and 0.04 g respectively SANBCR water up to 1 320 g / g, 30 ℃ 8 h after the water retention rate of 95%.