Abstract:

In an isopropanol（iPA）-H₂O heterogenous system，boron was used as a promoter and 3-chloro-2-hydroxypropyl trimethyl ammonium chloride（CTA）was used as an etherifying agent to achieve the cationic reaction of cellulose（Cel.）. By orthogonal experiments，the factors for degree of substitution（DS）were optimized，and product structure was identified by ¹H NMR. It showed that DS of the product gets 0.54，at mass ratio of m（Cel.）∶m（iPAⅠ）∶m（iPAⅡ）∶m（30%NaOH）∶m（50%CTA）∶m（BC）=100∶1000∶400∶296∶696∶20，25 ℃，60 min for activation，and 50 ℃ for 4 h reaction.

摘要：

在含有硼化合物（BC）的异丙醇（iPA）-H₂O非均相体系中，以3-氯-2-羟丙基三甲基氯化铵（CTA）为醚化剂，对棉短绒纤维素（Cel.）进行阳离子化反应。采用正交实验确定了影响阳离子纤维素取代度（DS）的因素，并对反应进行了优化，并采用¹H-NMR对产物的结构进行了确认。结果表明，按m(Cel.)∶m(iPAⅠ)∶m(iPAⅡ)∶m(30% NaOH)∶m(50% CTA)∶m(BC)= 100∶1000∶400∶296∶696∶20的配比，室温25 ℃活化处理60 min，50 ℃恒温反应4 h，产物取代度DS达到0.54。