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由玉米芯废料微波辅助解聚得到的生物基多元醇合成硬质聚氨酯泡沫。

Synthesis of rigid polyurethane foam from bio-based polyol obtained from microwave-assisted depolymerization of corn cob waste.

作者信息

Dîrloman Florin-Marian, Diacon Aurel, Brincoveanu Oana, Toader Gabriela, Dinescu Miron Adrian, Calinescu Ioan, Chipurici Petre, Rusen Edina, Mocanu Alexandra

机构信息

Military Technical Academy "Ferdinand I" 39-49 George Coşbuc Boulevard 050141 Bucharest Romania.

National University of Science and Technology Politehnica Bucharest, Faculty of Chemical Engineering and Biotechnologies 1-7 Gh. Polizu Street 011061 Bucharest Romania

出版信息

RSC Adv. 2025 Jun 2;15(23):18158-18172. doi: 10.1039/d5ra00487j. eCollection 2025 May 29.

DOI:10.1039/d5ra00487j
PMID:40458429
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12127930/
Abstract

This study presents an innovative upcycling methodology for the production of rigid polyurethane (PUR) foams using a biopolyol (BioPol) synthesized from corn cob lignocellulose waste. The BioPol was obtained through microwave-assisted (MW) irradiation under acidic catalysis, followed by neutralization of the acidic medium. Rheological characterization of the lignocellulose-derived BioPol was conducted to evaluate its suitability for industrial applications. The PUR foam formulation was designed based on the hydroxyl number of the BioPol, as determined by ASTM D4274. BioPol was combined with a commercial trifunctional polyol derived from the oxypropylation of glycerol, enabling the entire polyol component of the formulation to be classified as bio-based. Increasing the BioPol content in the formulation enhanced the cross-linking density of the resulting foams, which also led to a reduction in the average pore diameter. Uniaxial compressive strength tests revealed superior mechanical properties, with maximum resistance recorded at 3.18 MPa compared with the blank sample. The resultant high-density rigid PUR foams exhibit excellent thermal stability, mechanical robustness, and ease of processability, establishing a promising pathway for developing durable and eco-friendly bio-based polyurethane products.

摘要

本研究提出了一种创新的升级再造方法，用于生产硬质聚氨酯（PUR）泡沫，该方法使用由玉米芯木质纤维素废料合成的生物多元醇（BioPol）。BioPol是在酸性催化下通过微波辅助（MW）辐射获得的，随后对酸性介质进行中和。对木质纤维素衍生的BioPol进行流变学表征，以评估其在工业应用中的适用性。PUR泡沫配方是根据按照ASTM D4274测定的BioPol羟值设计的。BioPol与一种由甘油氧丙基化得到的商用三官能多元醇混合，使得配方中的整个多元醇组分都可归类为生物基。增加配方中BioPol的含量可提高所得泡沫的交联密度，这也导致平均孔径减小。单轴抗压强度测试显示出优异的机械性能，与空白样品相比，最大抗压强度达到3.18MPa。所得的高密度硬质PUR泡沫表现出优异的热稳定性、机械强度和易加工性，为开发耐用且环保的生物基聚氨酯产品开辟了一条有前景的途径。

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