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Production of Xylooligosaccharide, Nanolignin, and Nanocellulose through a Fractionation Strategy of Corncob for Biomass Valorization
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-07-14 , DOI: 10.1021/acs.iecr.0c02161 Qixuan Lin 1 , Yuhuan Yan 1 , Xinxin Liu 1 , Bei He 1 , Xiaohui Wang 1 , Xiaoying Wang 1 , Chuanfu Liu 1 , Junli Ren 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-07-14 , DOI: 10.1021/acs.iecr.0c02161 Qixuan Lin 1 , Yuhuan Yan 1 , Xinxin Liu 1 , Bei He 1 , Xiaohui Wang 1 , Xiaoying Wang 1 , Chuanfu Liu 1 , Junli Ren 1
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The three-step fractionation strategy of corncob was performed for the efficient production of xylooligosaccharide, nanolignin, and nanocellulose. High yield of xylooligosaccharide (XOS) was produced from corncob through organic acid–NaOH pretreatment. The influences of the type and concentration of organic acids and the amount and time of NaOH added on the XOS yield were investigated. For resource efficiency, the pretreated corncob residue was further soaked in p-toluenesulfonic acid (p-TsOH) at 80 °C to extract lignin, and then the residue after secondary treatment was catalyzed by TEMPO to produce cellulose nanofibers. Results showed that 38.3% of XOS was achieved by formic acid–NaOH pretreatment, and the addition of NaOH at the later stage of the pretreatment process was proved to prevent the excessive hydrolysis of xylan, resulting in the selective depolylmerization of xylan during pretreatment. In addition, the atomic force microscopy (AFM) analysis showed that nanoscale lignin and cellulose were obtained by the subsequent treatment. TEMPO-oxidized cellulose remarkably swelled in water, and the nanocellulose paper with high transparency was successfully prepared.
中文翻译：
通过玉米芯的分馏策略生产木糖寡糖，纳米木质素和纳米纤维素的生物量平衡
为了高效生产木寡糖，纳米木质素和纳米纤维素，执行了玉米芯的三步分馏策略。通过有机酸-NaOH预处理从玉米芯中获得高产量的木寡糖（XOS）。研究了有机酸的种类和浓度以及NaOH的加入量和时间对XOS收率的影响。为了提高资源效率，将预处理的玉米芯残留物进一步浸泡在对甲苯磺酸中（p-TsOH）在80°C下提取木质素，然后TEMPO催化二次处理后的残留物，以生产纤维素纳米纤维。结果表明，甲酸-NaOH预处理可达到38.3％的XOS，并且在预处理过程的后期添加NaOH可防止木聚糖过度水解，从而导致木聚糖在预处理过程中选择性解聚。另外，原子力显微镜（AFM）分析表明，通过后续处理获得了纳米级木质素和纤维素。TEMPO氧化的纤维素在水中显着溶胀，并成功制备了具有高透明度的纳米纤维素纸。
更新日期：2020-07-14
中文翻译：
通过玉米芯的分馏策略生产木糖寡糖，纳米木质素和纳米纤维素的生物量平衡
为了高效生产木寡糖，纳米木质素和纳米纤维素，执行了玉米芯的三步分馏策略。通过有机酸-NaOH预处理从玉米芯中获得高产量的木寡糖（XOS）。研究了有机酸的种类和浓度以及NaOH的加入量和时间对XOS收率的影响。为了提高资源效率，将预处理的玉米芯残留物进一步浸泡在对甲苯磺酸中（p-TsOH）在80°C下提取木质素，然后TEMPO催化二次处理后的残留物，以生产纤维素纳米纤维。结果表明，甲酸-NaOH预处理可达到38.3％的XOS，并且在预处理过程的后期添加NaOH可防止木聚糖过度水解，从而导致木聚糖在预处理过程中选择性解聚。另外，原子力显微镜（AFM）分析表明，通过后续处理获得了纳米级木质素和纤维素。TEMPO氧化的纤维素在水中显着溶胀，并成功制备了具有高透明度的纳米纤维素纸。
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