CAJ | 학술논문

本文研究了一种在酸性条件下合成半乳糖基纤维素的化学方法，探讨了反应时间、纤维素与半乳糖的投料比对共聚物中半乳糖摩尔取代度（ MS）的影响。在酸性条件下，纤维素与半乳糖共聚时，少量的半乳糖接枝到纤维素上形成水不溶物，即半乳糖基纤维素；而其余的半乳糖与纤维素降解的少量葡聚糖片段共聚形成水溶物。反应时间从50 min延长到120 min，水不溶物的半乳糖MS基本保持0.12不变；而反应时间为150 min时，水不溶物的半乳糖MS降低为0.073；水溶物主要是由半乳糖组成，葡萄糖含量少。增加半乳糖用量，水不溶物的半乳糖MS增加最后保持0.094不变；随着反应物中半乳糖含量的增加，水溶物的半乳糖MS也是先增加，后保持基本保持15不变。
본문연구료일충재산성조건하합성반유당기섬유소적화학방법，탐토료반응시간、섬유소여반유당적투료비대공취물중반유당마이취대도（ MS）적영향。재산성조건하，섬유소여반유당공취시，소량적반유당접지도섬유소상형성수불용물，즉반유당기섬유소；이기여적반유당여섬유소강해적소량포취당편단공취형성수용물。반응시간종50 min연장도120 min，수불용물적반유당MS기본보지0.12불변；이반응시간위150 min시，수불용물적반유당MS강저위0.073；수용물주요시유반유당조성，포도당함량소。증가반유당용량，수불용물적반유당MS증가최후보지0.094불변；수착반응물중반유당함량적증가，수용물적반유당MS야시선증가，후보지기본보지15불변。
A chemical method is presented for modification of cellulose with galactose under acidic conditions .The effects of time and feedstock ratios of cellulose to galactose on the molar substitution ( MS) of galactose in copolymer were investigated.We propose that the copolymerization undergoes in a way that a small amount of galactose grafted onto cellulose result in the water -insoluble composition ,and the glucose chains cut-off from the cellulose combine with galactose to generate water-soluble composition in copol-ymer.Time trials from 50 min to 120 min show that the MS of galactose of the water-insoluble composition was unchanging at 0.12;when time was150 min,the MS of galactose of the water-insoluble composition dropped to 0.073;the water-soluble composition is mainly consisted of galactose .With the increase of galactose ,the MS of galactose of the water-insoluble composition increases and was unchanging at 0.094;while the MS of galactose in water-soluble composition increases and was constant at 15 .