Bio-derived high-strength waterborne polyurethane using cellulose-nanofiber-stabilized Pickering emulsion

IF 3.6 4区化学 Q2 POLYMER SCIENCE

Polymer International Pub Date : 2025-07-10 DOI:10.1002/pi.70009

Miaojia Ye, Qian Hu, Xiaoyue Huang, Yiwen Wang, Wanchao Wu, Xinzhe Zhang, Chonggang Wu, Chuanqun Hu

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Abstract

Renewable biomass resources, including castor oil and cellulose, present promising avenues for sustainable polymer synthesis. This study involved the fabrication of a novel waterborne polyurethane utilizing cellulose nanofibers (CNFs) as a Pickering emulsion stabilizer and castor oil as a bio-derived polyol. Two different CNFs assessed the function of CNFs in stabilizing castor-oil-derived waterborne polyurethane emulsions by the ratio, their concentration and the emulsion storage duration. Dynamic light scattering and rheological assessments established that CNFs significantly enhanced emulsion stability by forming a semi-flexible network, which impeded droplet coalescence. Moreover, the incorporation of CNFs improved the mechanical performance of castor-oil-derived waterborne polyurethane films. Specifically, the addition of 1 wt% of the longer CNF resulted in an increase in the tensile strength and Young's modulus to 21.2 MPa and 91.0 MPa, respectively, signifying improvements of 103.0% and 256.6% over the CNF-free control. This investigation underscores the synergistic potential of biomass-derived nanomaterials in the design of high-performance, environmentally friendly polymers. © 2025 Society of Chemical Industry.

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生物衍生的高强度水性聚氨酯，采用纤维素-纳米纤维稳定的皮克林乳液

可再生生物质资源，包括蓖麻油和纤维素，为可持续聚合物合成提供了有前途的途径。本研究利用纤维素纳米纤维（CNFs）作为皮克林乳液稳定剂，蓖麻油作为生物衍生多元醇，制备了一种新型水性聚氨酯。两种不同的CNFs通过配比、浓度和乳液储存时间来评估CNFs在蓖麻油衍生水性聚氨酯乳液中的稳定作用。动态光散射和流变评估表明，CNFs通过形成半柔性网络显著提高乳液稳定性，从而阻碍液滴聚结。此外，CNFs的加入改善了蓖麻油衍生水性聚氨酯薄膜的机械性能。具体来说，添加1wt %的长CNF导致拉伸强度和杨氏模量分别增加到21.2 MPa和91.0 MPa，比不添加CNF的控制提高了103.0%和256.6%。这项研究强调了生物质衍生纳米材料在高性能、环保聚合物设计中的协同潜力。©2025化学工业协会。

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.