添加Fe^(3+)的纤维素酸水解前后纤维形态与化学结构的变化  

The Fiber Morphology and Chemical Structure Changes after Cellulose Acid Hydrolysis Added Fe^(3+)

作　　者：张向荣[1] 张美云[1,2] 李金宝[1,2] 贺行[1] 

机构地区：[1]陕西科技大学轻工与能源学院,陕西西安710021 [2]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《造纸科学与技术》2014年第5期7-11,共5页Paper Science & Technology

基　　金：教育部高校博士点专项基金;(20126125130001);制浆造纸工程国家重点实验室开放基金(201215);陕西科技大学博士启动基金(BJ13-02);陕西科技大学创新基金资助项目

摘　　要：本文研究了金属离子(Fe3+)助催化纤维素选择性酸水解过程中纤维形态结构的变化,酸水解条件为反应温度80℃,Fe3+浓度为0.3mol/L,反应时间为60min,盐酸浓度为2mol/L。通过光学显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)、傅立叶红外光谱(FTIR)及纤维分析仪(Mor Fi Compat)对水解纤维素进行了表征和分析。研究表明,Fe3+促进了纤维素选择性酸水解后纤维的表面形态及纤维长度的变化,但水解前后纤维素晶格结构未发生改变;添加Fe3+更有利于纤维素无定形区的选择性酸水解,与未添加Fe3+相比水解纤维素的结晶度由58.68%提高到61.47%,选择性酸水解前后纤维素结构未发生变化仍保持着天然纤维素的基本化学结构。The fiber morphological structure during metal ion Fe^3＋ catalytic cellulose selective acid hydrolysis was studied, the reaction temperature was 80℃, Fe^3＋ concentration was 0.3mol/L, the reaction time was 60min, and the concentration of hydrochloric acid was 2mol/L. By means of optical microscopy, scanning electron microssurface morphology and fiber length after cellulose selective acid hydrolysis, but the cellulose lattice structure was not changed; selective addition of Fe^3＋ is beneficial to the acid hydrolysis of cellulose in amorphous regions, the crystallinity of cellulose increased from 54.78% to 61.47% compared to no addition of Fe^3＋. After selective acid hydrolysis , the cellulose structure was not changed, and remained the basic chemical structure of natural cellulose.

关 键 词：纤维素结晶度 选择性酸水解 FE^3+ 纤维形态结构 

分 类 号：TS712[轻工技术与工程—制浆造纸工程]