Fabrication and characterization of humic acid-modified Fe3O4/waterborne polyurethane nanocomposite emulsions

IF 4.2 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2026-10-15 DOI:10.1007/s00289-026-06733-7

Lei Lin, Xiaofen Zhao, Zemin He, Xiangbo Feng, Zongcheng Miao, Yuzhen Zhao

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引用次数: 0

Abstract

Humic acid (HA)-modified Fe₃O₄/waterborne polyurethane (HA-FWPU) nanocomposite emulsions were successfully fabricated via a dual-modification strategy. Isophorone diisocyanate (IPDI), polycaprolactone diol (PCL-1000), and 2,2-bis (hydroxymethyl) propionic acid (DMPA) served as the primary reactants, while HA and nano-Fe₃O₄ were incorporated as functional modifiers. The optimal modifier content was systematically determined. Comprehensive characterization revealed that HA significantly reduced the average emulsion particle size and improved colloidal stability. Fe₃O₄ nanoparticles were surface-functionalized with (3-isocyanatopropyl) triethoxysilane (IPTS) to enhance compatibility and dispersibility within the polyurethane matrix. The incorporation of nano-Fe₃O₄ not only improved the mechanical properties and thermal stability of the films but also imparted notable electrical conductivity and magnetic responsiveness. At an optimal Fe₃O₄ loading of 2.0 wt%, the HA-FWPU3 film exhibited a tensile strength of 23.01 MPa—a 67.7% increase over the unmodified counterpart and a saturation magnetization of 6.01 emu/g. This work presents a feasible approach to designing multifunctional waterborne polyurethane composites for potential applications in electromagnetic shielding, sensors, and functional coatings.

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腐殖酸改性Fe3O4/水性聚氨酯纳米复合乳液的制备与表征

采用双改性策略成功制备了腐植酸（HA）改性Fe3O4/水性聚氨酯（HA- fwpu）纳米复合乳液。以异佛尔酮二异氰酸酯（IPDI）、聚己内酯二醇（PCL-1000）和2,2-二（羟甲基）丙酸（DMPA）为主要原料，羟基磷灰石（HA）和纳米fe3o4作为功能改性剂。系统地确定了最佳改性剂的含量。综合表征表明，透明质酸显著降低了乳液的平均粒径，提高了胶体稳定性。采用（3-异氰化丙基）三乙氧基硅烷（IPTS）对Fe3O4纳米颗粒进行表面功能化，以提高其在聚氨酯基体中的相容性和分散性。纳米fe3o4的掺入不仅改善了薄膜的力学性能和热稳定性，而且提高了薄膜的导电性和磁响应性。当Fe3O4的最佳负载为2.0 wt%时，HA-FWPU3薄膜的拉伸强度为23.01 mpa，比未改性的薄膜提高了67.7%，饱和磁化强度为6.01 emu/g。这项工作为设计多功能水性聚氨酯复合材料提供了一种可行的方法，该复合材料在电磁屏蔽、传感器和功能涂料方面具有潜在的应用前景。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."