不同聚合度再生纤维素在微波辐射下的水解行为。
Hydrolysis behavior of regenerated celluloses with different degree of polymerization under microwave radiation.
机构信息
Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China.
Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China.
出版信息
Bioresour Technol. 2015 Sep;191:229-33. doi: 10.1016/j.biortech.2015.05.036. Epub 2015 May 16.
This work studied the hydrolysis behavior of regenerated celluloses (RCs) with different degree of polymerization (DP) by using the catalyst of dilute acid under microwave radiation. Results showed that the DP had a considerable influence on hydrolysis of cellulose. The reactivity of RCs was significantly improved when DP was lower than 51. The highest sugar yield of 59.2% was achieved from RC with lowest DP of 23 at 160 °C for 15 min. But the lowest yield of 32.6% was obtained when RC with highest DP of 132 was used. Recrystallization of cellulose was found to hinder the further hydrolysis particularly with the high DP. The effect of recrystallization can be reduced by the decrease of DP of RCs. This research demonstrates that the DP of RCs plays a crucial role on hydrolysis and it provides a preliminary guide based on DP to find a suitable pretreatment method for cellulose hydrolysis.
本工作研究了不同聚合度（DP）的再生纤维素（RC）在微波辐射下稀酸催化剂作用下水解的行为。结果表明，DP 对纤维素的水解有很大的影响。当 DP 低于 51 时，RC 的反应性显著提高。在 160°C 下反应 15 分钟，DP 最低的 23 的 RC 可获得最高的糖收率 59.2%。但 DP 最高的 132 的 RC 则得到最低的收率 32.6%。发现纤维素的再结晶会阻碍进一步水解，尤其是在 DP 较高的情况下。RC 的 DP 降低可以减少再结晶的影响。本研究表明 DP 对 RC 的水解起着至关重要的作用，并为基于 DP 寻找适合纤维素水解的预处理方法提供了初步指导。
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