Janus型杂多酸复合催化剂在纤维素联级反应中催化转化产物调控机制的基础研究

"Cellulose", the main component of wood processing residue (sawdust), is as the research object. The synergistic effect of green solvent (H2O, ionic liquid) and Janus type heteropolyacid catalyst was used to solve the cellulose by directional polymerization. This project focuses on the reaction mechanism of cellulose “one-pot” transformation into platform compound (5-hydroxymethyl furfural, levulinicacid, levulinicacid ester, etc.), and explores the directional transformation process of small molecular compounds. Aiming at the requirement of the versatility of cellulose cascade conversion, it is proposed to construct the Janus type Hybrid acid catalyst (base//HPAs) with both antagonistic acid and alkali double center by electrostatic spinning technology. The catalytic activity, the mechanism of acid and alkali action and the synergistic catalytic effect of Base//HPAs catalyst in cellulose cascade reaction were systematically studied, and the regeneration cycle performance of the composite catalyst was clarified; To investigate the synergy between solvent and catalyst and obtain the key law of molecular scission in cellulose directional polymerization reaction. The project not only provides basic data for the reaction of acid and alkali dual-center HAPs composite catalysts in lignocellulose cascade, but also supplies a good foundation for the high value utilization of wood residues.

以木材加工剩余物(木屑)中的主要成分“纤维素”为研究对象，为解决林产废弃物高值化利用率低及产品不定向的问题，利用绿色溶剂(水、离子液体)与Janus型杂多酸复合催化剂的协同作用，定向解聚纤维素。重点研究纤维素一锅法定向转化为平台化合物的反应机理，探索平台小分子化合物的定向转化历程。针对纤维素联级转化对催化剂活性位点多功能性的要求，拟利用静电纺丝技术构建同时具有对抗性的酸碱双中心的Janus型杂多酸催化剂(base//HPAs)，并系统研究base//HPAs催化剂在纤维素cascade反应中的催化活性、酸碱作用机理及协同催化效应，明晰复合催化剂的再生循环性能；考察溶剂与催化剂的协同作用，获得纤维素定向解聚为小分子衍生物的断键规律。该项目不仅为酸碱双中心HPAs复合催化剂在木质纤维cascade反应提供基础数据，更为木材剩余物高值化利用奠定良好的前期基础。

以木材加工剩余物(木屑)中的主要成分“纤维素”为研究对象，为解决林产废弃物高值化利用率低及产品不定向的问题，利用绿色溶剂(水、离子液体)与Janus型杂多酸复合催化剂的协同作用，定向解聚纤维素。重点研究纤维素一锅法定向转化为平台化合物的反应机理，探索平台小分子化合物的定向转化历程。针对纤维素联级转化对催化剂活性位点多功能性的要求，构建多中心固体杂多酸催化剂，并系统研究多中心催化剂在纤维素cascade反应中的催化活性、酸碱作用机理及协同催化效应，明晰复合催化剂的再生循环性能；考察溶剂与催化剂的协同作用，获得纤维素定向解聚为小分子衍生物的断键规律。该项目为木质纤维cascade反应提供基础数据，更为木材剩余物高值化利用奠定良好的前期基础。

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