CAJ | 학술논문

采用微水固相法氧化改性皂荚多糖胶( GSG),以H2 O2为氧化剂,制备氧化皂荚多糖胶( OGSG)。通过凝胶渗透谱( GPC)和黏度计检测器等的分析,比较不同质量分数的H2 O2对OGSG的取代度( DS )、相对分子质量、黏度的影响。结果显示：随着氧化试剂H2 O2浓度的增大,氧化皂荚多糖胶的取代度和多分散性呈增加趋势,特性黏度和相对分子质量呈下降趋势。皂荚多糖胶20 g,30%H2 O218 g,反应时间1 h,反应温度65℃,在上述较佳反应条件下,取代度达到1.22。微水固相法氧化改性可以在使用较少反应试剂条件下达到较好氧化的效果。
채용미수고상법양화개성조협다당효( GSG),이H2 O2위양화제,제비양화조협다당효( OGSG)。통과응효삼투보( GPC)화점도계검측기등적분석,비교불동질량분수적H2 O2대OGSG적취대도( DS )、상대분자질량、점도적영향。결과현시：수착양화시제H2 O2농도적증대,양화조협다당효적취대도화다분산성정증가추세,특성점도화상대분자질량정하강추세。조협다당효20 g,30%H2 O218 g,반응시간1 h,반응온도65℃,재상술교가반응조건하,취대도체도1.22。미수고상법양화개성가이재사용교소반응시제조건하체도교호양화적효과。
In this study, A micro-water solid phase method was used in the oxidation of Gleditsia sinensis Lam. Galactomannan (GSG) with H2O2 as the oxidizing reagents to prepare the oxidated G. sinensis Lam. Galactomannan(OGSG). The degree of substitution (Ds), relative molar mass and viscosity of OGSG treated with different concentrations of H2O2 were investigated by gel permeation chromatography ( GPC) , and viscometer detectors. The result showed that with the increasing of concentration of H2 O2 , molar-mass values and the intrinsic viscosity decreased and degree of substitution and polydispersity increased. With the dosage of GSG and 30 % H2 O2 20 g and 18 g, the reaction temperature 65 ℃ and reaction time 1 h, the Ds of product reached 1. 22. The oxidation of GSG can be achieved by the method of micro-water solid phase oxidation modification under the condition of using fewer reaction reagent.