プラスチックフォームのための植物由来代替物を開発 (Plant-based Substitute for Fossil Fuels Developed for Plastic Foams)

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2025-01-28 ワシントン州立大学 (WSU)

ワシントン州立大学の研究チームは、化石燃料に代わる植物由来の材料を用いて、プラスチックフォームの製造に成功しました。この新しいフォームは、植物油から得られるポリウレタンを基盤としており、従来の石油ベースのフォームと同等の性能を持ちながら、環境への負荷を大幅に低減します。この技術は、断熱材や包装材など、さまざまな用途での応用が期待され、持続可能な材料開発の一環として注目されています。

<関連情報>

柔軟なポリウレタンフォーム調製のための深部共晶溶媒抽出リグニン Deep Eutectic Solvent-Extracted Lignin for Flexible Polyurethane Foam Preparation

Chenxi Wang,Isaac Oduro,Ziqi Yu,Cuixia Cheng,Dylan Cronin,Udishnu Sanyal,Amir Ameli,Wangcheng Liu,Baoming Zhao,Jinwen Zhang,Jinghang Wu,Keimpe van den Berg,Alexander Yahkind,and Xiao Zhang
ACS Sustainable Chemistry & Engineering

Abstract

プラスチックフォームのための植物由来代替物を開発 (Plant-based Substitute for Fossil Fuels Developed for Plastic Foams)

Lactic acid- and choline chloride-based deep eutectic solvents (DES) are applied for extracting lignin from pine wood. The ensuing DES-extracted lignin (DES lignin, DESL) has a purity higher than 90% and is rich in hydroxyl groups (about 5 mmol/g) without detectable sulfur. In-depth analyses show that DESL possesses good thermostability, low glass transition temperature (Tg), good polymer mobility, reduced cross-linking density, and rigidity. DESL was further subjected to an oxypropylation reaction to synthesize lignin-derived polyols (Lig-PO). Lig-PO carries functionalities that have both aromatic skeletons of isocyanate and hydroxyl groups of polyols, which are simultaneously leveraged in producing flexible polyurethane (PU) foam. The Lig-PO samples respectively derived from DESL, commercial alkali lignin (AL), and diluted acid corn stover lignin (DACSL) are subsequently used for flexible PU foam preparation with partial substitution (20 wt %) of petroleum-derived polyols. Compared to AL and DACSL, DESL-based PU (DESL-PU) foams have been the only ones capable of achieving highly homogeneous morphologies, well-oriented geometry, and superior thermal stability. DESL-PU foams have comparable compressive stress response with standard industrial flexible PU foam. The unique properties grant DESL to be an ideal biobased resource for PU foam production. This work demonstrates that DESL has a great potential for generating flexible biobased PU foams.

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