希釈剤不要の工業プロセスと炭素繊維複合材のクローズドループリサイクルに向けた低粘度アセタールエポキシ樹脂のワンポットグリーン合成
One-Pot Green Synthesis of Low-Viscosity Acetal Epoxy Resins for Diluent-Free Industrial Processing and Closed-Loop Recycling of Carbon Fiber Composites (原題)
Dehang Yang, Shuai Du, Shanshan Dai, Fengyuan Zhang, Songqi Ma
🤖 gxceed AI 要約
日本語
精製工程を省くワンポット合成で、粘度1.9 Pa·sの低粘度アセタールエポキシ(BCAE)を開発。希釈剤なしでVARI成形が可能となり、触媒不要の熱再加工と酸分解による二重リサイクル性を実現した。炭素繊維は強度96.7%を保持して回収され、モノマーは再合成、副生成物は硬化剤へアップサイクルされる。LCAで焼却比約79%のCO2削減を確認している。
English
A one-pot, purification-free synthesis yields a low-viscosity acetal epoxy (BCAE, 1.9 Pa·s) enabling diluent-free vacuum resin infusion of CFRPs. The cured network offers catalyst-free thermal reprocessing and mild acid degradation, allowing closed-loop monomer recycling plus open-loop upcycling of the amine polyol byproduct. Carbon fibers retain 96.7% strength, and LCA shows ~79% lower CO2e than incineration.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
風車ブレードや航空機複合材のリサイクルは、日本でもGX実現に向けた素材産業の重要課題。CFRPのクローズドループ化はScope 3排出削減やサーキュラーエコノミー開示の根拠データになり得る。
In the global GX context
Recyclable thermoset composites address end-of-life emissions in wind and aerospace supply chains, feeding into Scope 3 accounting and circular-economy disclosure under CSRD/ISSB. The LCA-based CO2e comparison strengthens the quantitative case for closed-loop material design.
👥 読者別の含意
🔬研究者:動的共有結合と低粘度設計を両立させた素材設計と、モノマー/副生成物の二経路リサイクル評価の手法が参考になる。
🏢実務担当者:風車・航空複合材の調達や廃棄処理コスト、Scope 3削減策としてリサイクル可能樹脂の採用検討に使える。
🏛政策担当者:CFRPリサイクル促進やサーキュラーエコノミー政策の根拠として、LCAに基づく削減効果の参照値となる。
📄 Abstract（原文）
Abstract Recyclable epoxy thermosets and their carbon fiber-reinforced polymer composites (CFRPs) have faced three long-standing bottlenecks: complex synthesis and purification processes, inherently high viscosity incompatible with the industrial vacuum-assisted resin infusion (VARI) process—the dominant technology for manufacturing large wind turbine blades and aerospace composites—and incomplete recovery of individual composite constituents. While dynamic covalent bonds offer a promising route to epoxy recyclability, most existing recyclable epoxy systems fail to simultaneously overcome these hurdles. Herein, we report a green, scalable one-pot synthesis of a novel low-viscosity acetal epoxy resin (BCAE) that simultaneously addresses the synthesis, processing, and end-of-life recycling challenges of epoxy thermosets. This telescoped protocol eliminates intermediate purification steps, delivering BCAE with an ultra-low viscosity of 1.9 Pa·s at 25 °C—6.7-fold lower than commercial bisphenol A diglycidyl ether (DGEBA)—enabling diluent-free VARI fabrication of high-performance CFRPs. The cured BCAE networks exhibit dual recyclability: catalyst-free thermal reprocessability and mild acid-triggered degradation under ambient conditions. Most notably, we demonstrate a closed-loop monomer recycling combined with an open-loop upcycling system with key quantitative breakthroughs: carbon fibers are recovered with 96.7% strength retention in the regenerated composite, the benzaldehyde monomer is recycled to resynthesize BCAE with identical performance, and the tertiary amine polyol degradation product is upcycled as a high-value curing agent for commercial epoxies. Life cycle assessment confirms that closed‑loop recycling reduces CO2‑equivalent emissions by approximately 79% compared with incineration. This work provides a general and industrially viable strategy for sustainable thermoset composites, aligning perfectly with global carbon neutrality goals.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acssuschemeng.6c09509first seen 2026-10-22 04:53:12 · last seen 2026-11-06 04:52:29
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