双醛纤维素的制备及表征  

Preparation and Characteristic of Dialdehyde Cellulose

作　　者：石磊[1] 甄文娟[1] 单志华[1] 

机构地区：[1]四川大学食品与轻纺学院皮革系,四川成都610065

出　　处：《精细化工》2008年第8期795-798,共4页Fine Chemicals

基　　金：国家自然科学基金(No:50573051);高等学校博士学科专项科研基金(No:20050610046)资助~~

摘　　要：以微晶纤维素(MCC)为原料,高碘酸钠为氧化剂,用正交实验考察了各种条件对氧化效率的影响。结果表明,影响醛基含量的顺序依次是投料比、反应时间、pH及反应温度。最佳氧化条件为:高碘酸钠和微晶纤维素投料质量比为1.0,反应温度30℃,pH=3,反应时间8 h。通过FTIR,XRD和SEM等对产物双醛纤维素在微粒形态、光谱特征、功能基团含量、晶体结构进行了表征。Orthogonal experiments of microcrystal cellulose oxidized with sodium periodate was carried out.The results indicated that effects of on affecting the percentage of aldehyde group in the product were in the sequence：weight ratio of NaIO4 to cellulose,reaction time,pH and reaction temperature.High aldehyde group content was obtained under the condition of weight ratio 1.0,pH 3.0,8 h and 30 ℃.Characterized by means of FTIR,XRD and SEM,the dialdehyde cellulose is much different from microcrystal cellulose in their structure.

关 键 词：微晶纤维素 高碘酸钠 氧化 醛基 皮革化学品 

分 类 号：TQ352.79[化学工程]