高等学校化学学报

高等学校化学学报

• 研究简报 • 上一篇    下一篇

超声波活化处理对微晶纤维素结构和氧化反应性能的影响

王献玲, 方桂珍, 胡春平   

  1. 东北林业大学生物质材料科学与技术教育部重点实验室, 哈尔滨 150040
  • 收稿日期:2006-03-27 修回日期:1900-01-01 出版日期:2007-03-10 发布日期:2007-03-10
  • 通讯作者: 方桂珍

Influence of Ultrasonic Wave-activating Treatment on Structure and Oxidation Reactivity of Microcrystalline Cellulose

WANG Xian-Ling, FANG Gui-Zhen, HU Chun-Ping   

  1. Key Laboratory of Bio-based Material Science and Technology of Education Ministry, Northeast Forestry University, Harbin 150040, China
  • Received:2006-03-27 Revised:1900-01-01 Online:2007-03-10 Published:2007-03-10
  • Contact: FANG Gui-Zhen

PDF (PC)

被引次数

69

摘要： 采用无污染的超声波技术预处理微晶纤维素, 研究了微晶纤维素在活化前后的超分子结构、形态结构和可及度的变化, 超声波活化对微晶纤维素选择性氧化性能的影响.

关键词: 微晶纤维素, 超声波活化, 可及度, 氧化纤维素

Abstract: Microcrystalline cellulose(MCC) was activated with ultrasonic wave. The changes in supramolecular structure and morphology structure of MCC were studied by XRD and SEM. The influence of ultrasonic treatment on accessibility and oxidation reactivity of MCC with periodate sodium was investigated. The mechanism of the change of reactivity after ultrasonic treatment was discussed. The results showed that crystalline type of cellulose was not changed and no significant changes in crystalline size of cellulose were observed. However, after treatment with ultrasonic wave the crystallinity of cellulose decreased and morphology changes of the treated MCC was significant. These changes contributed to the increase of specific surface area and WRV, which implied the increase of accessibility. The reactivity of MCC with periodate sodium was successfully improved after ultrasonic treatment. The aldehyde content of its oxidized products dialdehyde cellulose(DAC) was improved from 71.3% to 85.0%. As the increase of ultrasonic treating time the aldehyde content first increased and then decreased.

Key words: Microcrystalline cellulose, Ultrasonic wave activation, Accessibility, Oxycellulose

中图分类号: 

TrendMD: