Ligwood LLC, Madison, WI 53705-2828, USA.
Forest Products Lab, USDA Forest Service, Madison, WI 53726-2398, USA.
Molecules. 2021 Dec 28;27(1):154. doi: 10.3390/molecules27010154.
In this work, few-layer graphene materials were produced from Fe-lignin nanocomposites through a molecular cracking and welding (MCW) method. MCW process is a low-cost, scalable technique to fabricate few-layer graphene materials. It involves preparing metal (M)-lignin nanocomposites from kraft lignin and a transition metal catalyst, pretreating the M-lignin composites, and forming of the graphene-encapsulated metal structures by catalytic graphitization the M-lignin composites. Then, these graphene-encapsulated metal structures are opened by the molecule cracking reagents. The graphene shells are peeled off the metal core and simultaneously welded and reconstructed to graphene materials under a selected welding reagent. The critical parameters, including heating temperature, heating time, and particle sizes of the Fe-lignin composites, have been explored to understand the graphene formation mechanism and to obtain the optimized process parameters to improve the yield and selectivity of graphene materials.
在这项工作中，通过分子裂解和焊接（MCW）方法从 Fe-木质素纳米复合材料中生产出少层石墨烯材料。MCW 工艺是一种低成本、可扩展的制造少层石墨烯材料的技术。它涉及从 kraft 木质素和过渡金属催化剂制备金属（M）-木质素纳米复合材料，预处理 M-木质素复合材料，并通过催化石墨化 M-木质素复合材料形成石墨烯封装金属结构。然后，通过分子裂解试剂打开这些石墨烯封装的金属结构。石墨烯壳从金属核心上剥落下来，并在选定的焊接试剂下同时焊接和重构为石墨烯材料。已经探索了包括加热温度、加热时间和 Fe-木质素复合材料粒径在内的关键参数，以了解石墨烯的形成机制，并获得优化的工艺参数，以提高石墨烯材料的产率和选择性。
