当前位置：
X-MOL 学术
›
ACS Sustain. Chem. Eng.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Bifunctionalization of Cellulose Fibers by One-Step Williamson’s Etherification to Obtain Modified Microfibrillated Cellulose
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-09-27 , DOI: 10.1021/acssuschemeng.2c03754 Céline Moreau 1 , Xavier Falourd 1, 2 , Malika Talantikite 1 , Bernard Cathala 1 , Ana Villares 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2022-09-27 , DOI: 10.1021/acssuschemeng.2c03754 Céline Moreau 1 , Xavier Falourd 1, 2 , Malika Talantikite 1 , Bernard Cathala 1 , Ana Villares 1
Affiliation
|
We present here a straightforward strategy to prepare multifunctional cellulose by a one-pot modified carboxymethylation reaction. We focused on the introduction of negative charge (carboxymethyl groups) and benzophenone moieties {[4-(bromomethyl)phenyl][4-(prop-2-yn-1-yloxy)phenyl]methanone} on the surface of cellulose fibers by a concomitant Williamson’s etherification. The presence of negative charge on the cellulose surface facilitated fibrillation, and we obtained microfibrillated cellulose by soft magnetic stirring. The chemical grafting of benzophenone functionalities was evidenced by combining Fourier-transform infrared and solid-state 13C CP/MAS NMR techniques and by the polymerization of different monomers (methyl methacrylate, dodecyl methacrylate, and styrene) on the cellulose surface. The presence of both functionalities allowed fabricating papers and 3D networks, and their subsequent cross-linking by the carboxylate groups, and hydrophobization by polymerization at the benzophenone groups. Indeed, bifunctional cellulose showed interesting properties that were not achieved by the mixture of monofunctional celluloses.
中文翻译：
一步威廉姆森醚化纤维素纤维双功能化获得改性微纤化纤维素
我们在这里提出了一种通过一锅改性羧甲基化反应制备多功能纤维素的简单策略。我们专注于在纤维素纤维表面引入负电荷（羧甲基）和二苯甲酮部分 {[4-(bromomethyl)phenyl][4-(prop-2-yn-1-yloxy)phenyl]methanone}伴随威廉姆森的醚化。纤维素表面负电荷的存在促进了原纤化，我们通过软磁搅拌获得了微纤化纤维素。通过结合傅里叶变换红外和固态13证明了二苯甲酮官能团的化学接枝C CP/MAS NMR 技术和不同单体（甲基丙烯酸甲酯、甲基丙烯酸十二烷基酯和苯乙烯）在纤维素表面的聚合。这两种功能的存在允许制造纸和 3D 网络，以及它们随后通过羧酸酯基团的交联，以及通过二苯甲酮基团的聚合而疏水化。事实上，双功能纤维素显示出有趣的特性，这些特性是单功能纤维素混合物无法实现的。
更新日期：2022-09-27
中文翻译：
一步威廉姆森醚化纤维素纤维双功能化获得改性微纤化纤维素
我们在这里提出了一种通过一锅改性羧甲基化反应制备多功能纤维素的简单策略。我们专注于在纤维素纤维表面引入负电荷（羧甲基）和二苯甲酮部分 {[4-(bromomethyl)phenyl][4-(prop-2-yn-1-yloxy)phenyl]methanone}伴随威廉姆森的醚化。纤维素表面负电荷的存在促进了原纤化，我们通过软磁搅拌获得了微纤化纤维素。通过结合傅里叶变换红外和固态13证明了二苯甲酮官能团的化学接枝C CP/MAS NMR 技术和不同单体（甲基丙烯酸甲酯、甲基丙烯酸十二烷基酯和苯乙烯）在纤维素表面的聚合。这两种功能的存在允许制造纸和 3D 网络，以及它们随后通过羧酸酯基团的交联，以及通过二苯甲酮基团的聚合而疏水化。事实上，双功能纤维素显示出有趣的特性，这些特性是单功能纤维素混合物无法实现的。
京公网安备 11010802027423号