School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
Carbohydr Polym. 2018 Feb 1;181:633-641. doi: 10.1016/j.carbpol.2017.11.102. Epub 2017 Nov 29.
Three main components of lignocellulose (cellulose, hemicellulose, and lignin isolated from sugarcane bagasse (SCB)) as well as holocellulose and SCB were modified with maleic acid by mechanical activation (MA)-assisted solid phase reaction (MASPR) technology. The order of reactivity was found to be lignin>hemicellulose>cellulose. The amorphous structure of lignin and hemicellulose mainly attributed to their better reactivity, and the modified lignin could reach a maximum degree of esterification (DE) of 93.45%. MA improved the accessibility and reactivity of cellulose, as the DE of modified cellulose gradually increased with milling time and reached the maximum value of 57.30% at 120min, which had significant effect on structure changes and DE of modified holocellulose and SCB. MA enhanced the esterification of all three components in lignocellulose with relatively high substituent distribution in them, and maleated SCB with a maximum DE of 64.17% was successfully prepared by this simple, green, and effective MASPR technology.
从甘蔗渣（SCB）中分离出的木质纤维素（纤维素、半纤维素和木质素）的三个主要成分以及全纤维素和 SCB 均通过机械活化（MA）辅助固相反响（MASPR）技术用马来酸进行改性。发现反应活性顺序为木质素>半纤维素>纤维素。木质素和半纤维素的无定形结构主要归因于它们更好的反应性，改性木质素的酯化度（DE）最高可达 93.45%。MA 提高了纤维素的可及性和反应性，因为改性纤维素的 DE 随着研磨时间的增加而逐渐增加，在 120min 时达到 57.30%的最大值，这对改性全纤维素和 SCB 的结构变化和 DE 具有显著影响。MA 增强了木质纤维素中所有三个成分的酯化反应，并且在其中具有相对较高的取代基分布，通过这种简单、绿色、有效的 MASPR 技术成功制备了最大 DE 为 64.17%的马来酸化 SCB。
