Preparation and characterization of PFMP@GE microcapsules for enhancing the safety of UV-curable polymers

IF 4.5 3区 工程技术 Q1 CHEMISTRY, APPLIED
Longtai Qi , Zhixiang Xing , Jie Wu , Wanzheng Lu , Yecheng Liu , Aiwen Guo , Yaqin Shi , Tianyu Zhou , Juncheng Jiang
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Abstract

Fire hazards associated with UV-curable polymers have limited their broader application. This study aims to develop efficient and environmentally friendly safety strategies for UV-curable polymers. Microcapsules were synthesized via simple coacervation, using perfluoro(2-methyl-3-pentanone) (PFMP) as the core and gelatin (GE) as the wall material. PFMP@GE microcapsules were then incorporated into UV-curable resin prepolymer to produce a UV-curable resin board with active fire-extinguishing capabilities. The microcapsules' morphology, chemical composition, and thermal stability of the microcapsules were analyzed, along with the safety performance of the UV-curable resin board containing PFMP@GE microcapsules in confined spaces with sustained combustion. The morphology, chemical composition, and thermal stability results indicate that the microcapsules, synthesized under emulsification conditions (5 min of shearing at 8000 rpm and a 2.0 % w/v ratio of sodium dodecyl benzene sulfonate (SDBS) to core material), have a spherical core-shell structure. The wall material provides a cavity space that stably encapsulates the core material. Fire tests in confined spaces demonstrated that the heat-responsive PFMP@GE microcapsules in the UV-curable resin released PFMP under fire conditions, with changes in smoke gas concentrations and temperature further verifying that the flames were effectively extinguished. The core material's synergistic fire-extinguishing mechanism of the core material imparts active safety features to the UV-curable resin.

Abstract Image

用于提高紫外线固化聚合物安全性的 PFMP@GE 微胶囊的制备和表征
与紫外线固化聚合物相关的火灾危险限制了其更广泛的应用。本研究旨在为紫外线固化聚合物开发高效、环保的安全策略。以全氟(2-甲基-3-戊酮)(PFMP)为芯,明胶(GE)为壁材料,通过简单的共凝合成了微胶囊。然后将 PFMP@GE 微胶囊加入紫外线固化树脂预聚物中,制成具有主动灭火功能的紫外线固化树脂板。分析了微胶囊的形态、化学成分和热稳定性,以及含有 PFMP@GE 微胶囊的紫外线固化树脂板在持续燃烧的密闭空间中的安全性能。形态、化学成分和热稳定性结果表明,在乳化条件下合成的微胶囊(在 8000 转/分钟的转速下剪切 5 分钟,十二烷基苯磺酸钠(SDBS)与芯材的重量/体积比为 2.0%)具有球形芯壳结构。壁材料提供了一个空腔空间,将芯材料稳定地包裹起来。在密闭空间进行的火灾测试表明,紫外线固化树脂中的热响应 PFMP@GE 微胶囊在火灾条件下释放出 PFMP,烟气浓度和温度的变化进一步验证了火焰被有效扑灭。芯材的协同灭火机制为紫外线固化树脂赋予了主动安全功能。
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来源期刊
Reactive & Functional Polymers
Reactive & Functional Polymers 工程技术-高分子科学
CiteScore
8.90
自引率
5.90%
发文量
259
审稿时长
27 days
期刊介绍: Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.
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