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Stable Suspensions of Lignocellulose Nanofibrils (LCNFs) Dispersed in Organic Solvents
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-10-15 , DOI: 10.1021/acssuschemeng.0c06120 Ming Yan 1, 2 , Lili Zhang 1 , Jinxia Ma 1 , Hailong Lu 1, 3 , Xiaofan Zhou 1, 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-10-15 , DOI: 10.1021/acssuschemeng.0c06120 Ming Yan 1, 2 , Lili Zhang 1 , Jinxia Ma 1 , Hailong Lu 1, 3 , Xiaofan Zhou 1, 2
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Lignocellulose-based nanomaterials were universally acknowledged as a kind of natural biopolymer and emerging multifunctional nanomaterial. However, the poor dispersion of lignocellulose nanofibrils (LCNFs) would limit their full potential applications. In this work, we reported a simple and industrially viable strategy for the preparation of well-dispersed and thermostable LCNFs from wheat straw (WS) without chemical modification. Diols (ethylene glycol, 1,2-propanediol, and 1,4-butanediol) were employed to swell and crush lignocellulose fibers by screw extrusion. LCNFs could be easily obtained by colloid milling using 0.15% w/w sulfuric acid as a catalyst. The yield of LCNFs was more than 65.2%. The dispersion stability of LCNFs was assessed using an ultraviolet–visible spectrophotometer (UV–vis). Thermal stability of LCNFs was evaluated by thermal gravimetric analysis (TGA). Solvatochromic properties of the swollen solvents were characterized by solvatochromic parameters. The LCNFs were also characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results confirmed that LCNFs prepared through this process had potential advanced applications.
中文翻译：
木质纤维素纳米原纤维（LCNF）的稳定悬浮液分散在有机溶剂中
基于木质纤维素的纳米材料被普遍认为是一种天然的生物聚合物和新兴的多功能纳米材料。然而，木质纤维素纳米原纤维（LCNF）的分散性差将限制其全部潜在应用。在这项工作中，我们报告了一种简单且工业上可行的策略，无需进行化学修饰即可从麦草（WS）制备分散良好且热稳定的LCNF。使用二元醇（乙二醇，1,2-丙二醇和1,4-丁二醇）通过螺杆挤出使木质纤维素纤维溶胀和破碎。通过使用0.15％w / w硫酸作为催化剂的胶体研磨可以轻松获得LCNF。LCNF的产率超过65.2％。LCNFs的分散稳定性使用紫外可见分光光度计（UV-vis）进行评估。LCNF的热稳定性通过热重分析（TGA）进行评估。通过溶剂变色参数表征溶胀溶剂的溶剂变色性质。还使用扫描电子显微镜（SEM），X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对LCNF进行了表征。结果证实，通过此过程制备的LCNF具有潜在的先进应用。
更新日期：2020-10-26
中文翻译：
木质纤维素纳米原纤维（LCNF）的稳定悬浮液分散在有机溶剂中
基于木质纤维素的纳米材料被普遍认为是一种天然的生物聚合物和新兴的多功能纳米材料。然而，木质纤维素纳米原纤维（LCNF）的分散性差将限制其全部潜在应用。在这项工作中，我们报告了一种简单且工业上可行的策略，无需进行化学修饰即可从麦草（WS）制备分散良好且热稳定的LCNF。使用二元醇（乙二醇，1,2-丙二醇和1,4-丁二醇）通过螺杆挤出使木质纤维素纤维溶胀和破碎。通过使用0.15％w / w硫酸作为催化剂的胶体研磨可以轻松获得LCNF。LCNF的产率超过65.2％。LCNFs的分散稳定性使用紫外可见分光光度计（UV-vis）进行评估。LCNF的热稳定性通过热重分析（TGA）进行评估。通过溶剂变色参数表征溶胀溶剂的溶剂变色性质。还使用扫描电子显微镜（SEM），X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对LCNF进行了表征。结果证实，通过此过程制备的LCNF具有潜在的先进应用。
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