Alinejad Mona, Henry Christián, Nikafshar Saeid, Gondaliya Akash, Bagheri Sajad, Chen Nusheng, Singh Sandip K, Hodge David B, Nejad Mojgan
Department of Forestry, Michigan State University, East Lansing, MI 48824, USA.
Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA.
Polymers (Basel). 2019 Jul 18;11(7):1202. doi: 10.3390/polym11071202.
Polyurethane chemistry can yield diverse sets of polymeric materials exhibiting a wide range of properties for various applications and market segments. Utilizing lignin as a polyol presents an opportunity to incorporate a currently underutilized renewable aromatic polymer into these products. In this work, we will review the current state of technology for utilizing lignin as a polyol replacement in different polyurethane products. This will include a discussion of lignin structure, diversity, and modification during chemical pulping and cellulosic biofuels processes, approaches for lignin extraction, recovery, fractionation, and modification/functionalization. We will discuss the potential of incorporation of lignins into polyurethane products that include rigid and flexible foams, adhesives, coatings, and elastomers. Finally, we will discuss challenges in incorporating lignin in polyurethane formulations, potential solutions and approaches that have been taken to resolve those issues.
聚氨酯化学能够生产出多种聚合材料，这些材料具有广泛的性能，适用于各种应用和市场领域。利用木质素作为多元醇，为将目前未充分利用的可再生芳香聚合物纳入这些产品提供了机会。在这项工作中，我们将回顾在不同聚氨酯产品中利用木质素替代多元醇的技术现状。这将包括讨论木质素的结构、多样性以及在化学制浆和纤维素生物燃料过程中的改性，木质素提取、回收、分级和改性/功能化的方法。我们将讨论将木质素纳入聚氨酯产品的潜力，这些产品包括硬质和软质泡沫、粘合剂、涂料和弹性体。最后，我们将讨论在聚氨酯配方中加入木质素的挑战、已采取的潜在解决方案和方法来解决这些问题。
