PARTIAL CARBAMOYLATION OF CELLULOSE MICROSPHERES： A NEW METHOD TO PREPARE ADSORBENTS FOR LIQUID CHROMATOGRAPHY

Micron-sized cellulose microspheres were prepared through sol-gel method using NaOH/urea solution to dissolve cellulose, then cross-linked by 1,6-hexanylene diisocyanate （HDI）, toluene 2,4-diisocyanate （TDI） and 1,4-phenylene diisocyanate （PDI）, respectively. The reaction conditions for partial modi...

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Bibliographic Details
Published in:Chinese journal of polymer science 2013-12, Vol.31 (12), p.1725-1732
Main Authors: Chen, Wei, Bin, Qin, Bai, Zheng-wu, Zhou, Xing-ping, Xie, Xiao-lin
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Industrial Chemistry/Chemical Engineering
Polymer Sciences
二异氰酸酯
制备
吸附剂
微球
液相色谱
甲酰化
电化学方法
纤维素
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Summary:Micron-sized cellulose microspheres were prepared through sol-gel method using NaOH/urea solution to dissolve cellulose, then cross-linked by 1,6-hexanylene diisocyanate （HDI）, toluene 2,4-diisocyanate （TDI） and 1,4-phenylene diisocyanate （PDI）, respectively. The reaction conditions for partial modification of the microspheres were studied. The degree of substitution （DS） in cellulose was controlled by adjusting the reaction conditions. HDI-crosslinked microspheres were partially modified with phenyl isocyanate to obtain chiral stationary phases （CSPs）. The CSPs of a lower degree of crosslinking （DC） showed better chiral recognition ability than those of a higher DC. Meanwhile the CSPs prepared by pre- modification exhibited better chiral recognition ability than those prepared by pre-crosslinking.
ISSN:0256-7679
1439-6203
DOI:10.1007/s10118-013-1312-x