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用不同质量分数的氢氧化钠(Na OH)溶液对木纤维素浆粕进行活化,并将活化后的浆粕分别溶解于1-烯丙基-3-甲基咪唑氯盐([AMIM]Cl)、1-乙基-3-甲基咪唑氯盐([EMIM]Cl)和1-丁基-3-甲基咪唑磷酸二乙酯盐([BMIM]DEP)3种咪唑型离子液体中,通过红外光谱、扫描电镜、X射线衍射及偏光显微镜对其进行表征,结果表明:在考虑成本因素的情况下,选用18%的NaOH溶液对木纤维素浆粕的活化效果较好;在相同试验条件下,不同离子液体对活化后木纤维素浆粕的降解顺序是:[AMIM]Cl>[BMIM]DEP>[EMIM]Cl,溶解能力顺序是:[AMIM]Cl>[EMIM]Cl>[BMIM]DEP;在70~110℃温度范围内,随温度升高,溶解时间缩短.
The wood cellulose pulp was activated with sodium hydroxide (NaOH) with different mass fractions and the activated pulp was dissolved in 1-allyl-3-methylimidazolium chloride ([AMIM] Cl ), 1-ethyl-3-methylimidazolium chloride ([EMIM] Cl) and 1-butyl-3-methylimidazolium diethyl phosphate ([BMIM] The results of IR, SEM, XRD and Polarization Microscope showed that the activation of wood cellulose pulp with 18% NaOH solution was better under the condition of cost. In the same test (AMIM) Cl> [BMIM] DEP> [EMIM] Cl, the order of dissolution of [AMIM] Cl> [EMIM] Cl> [EMIM] BMIM] DEP; in the temperature range of 70 ~ 110 ℃, with the increase of temperature, the dissolution time is shortened.