College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou 311300, PR China; Zhejiang Longsheng Chemical Research Institute Co., Ltd., Shaoxing 312300, PR China.
College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou 311300, PR China.
Int J Biol Macromol. 2024 Oct;277(Pt 2):134275. doi: 10.1016/j.ijbiomac.2024.134275. Epub 2024 Jul 30.
Flame-retardant epoxy resins with tough, transparent, ultraviolet shielding, and low dielectric properties have fascinating prospects in electronic and electrical applications, but it is still challenging at present. In this work, a bio-based macromolecule was synthesized from vanillin (a lignin derivative), phenyl dichlorophosphate, 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO), and poly(propylene glycol) bis(2-aminopropyl ether). The bio-based macromolecule, namely, MFR, was designed and added to the epoxy resin (EP). The cured EP containing 15 wt% MFR (i.e., EP/MFR15) exhibits excellent flame retardancy with an Underwriter Laboratory 94 (UL-94) V-0 rating and a limiting oxygen index (LOI) of 29.2 %. Furthermore, the peak heat release rate (PHRR) and total heat release rate (THR) are drastically reduced by 59.5 % and 40.7 %, respectively. Meanwhile, EP/MFR15 shows 20.3 % and 43.8 % improvements in tensile strength and toughness, respectively. Moreover, MFR simultaneously endows EP with accessional ultraviolet shielding performance and low dielectric constant without sacrificing transparency. This work provides a promising strategy for fabricating a bio-based macromolecular flame retardant and preparing a high-performance EP composite with versatile properties.
具有坚韧、透明、紫外线屏蔽和低介电性能的阻燃环氧树脂在电子和电气应用中具有迷人的前景，但目前仍具有挑战性。在这项工作中，从香草醛（木质素衍生物）、苯基二氯膦、9,10-二氢-9-氧杂-10-磷杂菲 10-氧化物（DOPO）和聚丙二醇双（2-氨基丙基醚）合成了一种生物基大分子。这种生物基大分子，即 MFR，被设计并添加到环氧树脂（EP）中。含有 15wt%MFR 的固化 EP（即 EP/MFR15）表现出优异的阻燃性，UL-94 V-0 评级和极限氧指数（LOI）为 29.2%。此外，峰值热释放率（PHRR）和总热释放率（THR）分别大幅降低了 59.5%和 40.7%。同时，EP/MFR15 的拉伸强度和韧性分别提高了 20.3%和 43.8%。此外，MFR 同时赋予 EP 额外的紫外线屏蔽性能和低介电常数，而不会牺牲透明度。这项工作为制备生物基大分子阻燃剂和制备具有多功能性能的高性能 EP 复合材料提供了一种有前途的策略。
