超声预处理提高蔗髓纤维素选择性氧化性能的研究

材料导报, 2014, 28(20): 68-71. doi: 10.11896/j.issn.1005-023X.2014.20.016

超声预处理提高蔗髓纤维素选择性氧化性能的研究

高欣 ^1, , 张恒 ^2, , 陈克利 ^3, , 刘其星 ^4, , 朱正良 ^5,

1.昆明理工大学制浆造纸工程研究中心,昆明,650504

2.昆明理工大学制浆造纸工程研究中心,昆明,650504

3.昆明理工大学制浆造纸工程研究中心,昆明,650504

4.昆明理工大学制浆造纸工程研究中心,昆明,650504

5.昆明理工大学制浆造纸工程研究中心,昆明,650504

基金项目: 云南省教育厅科学研究基金项目(2012Y537) 国家大学生创新性实验计划项目(091067427) 昆明理工大学测试基金(20130490) 国家自然科学基金(21276119,51363013)

关键词：蔗髓 , 纤维素 , 超声预处理 , 4-AcNH-TEMPO , 选择性氧化

Research on Enhancing of the Regioselective Oxidation of Cellulose from Bagasse Pith by Ultrasonic Pretreatments

Keywords： bagasse pith , cellulose , ultrasonic pretreatment , 4-AcNH-TEMPO , regioselective oxidation

采用超声波对蔗髓纤维素进行预处理,研究超声条件对纤维素在4-乙酰氨基-2,2,6,6-四甲基哌啶氧自由基(4-AcNH-TEMPO)/次氯酸钠(NaClO)/亚氯酸钠(NaClO2)体系中的选择性氧化反应的影响.结果表明,超声预处理能显著提高纤维素的氧化反应活性,其中超声强度和时间对氧化纤维素性状影响较大,且在该体系中所得产物由水溶性和不溶性氧化纤维素构成.通过X射线衍射(XRD)、红外光谱(FT-IR)和扫描电镜(SEM)对超声前后的纤维素及其两种氧化产物进行了结构分析与表征.

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