A novel DOPO-AS/M(OH)(OCH3) organic/inorganic nanohybrid for enhancing the flame retardancy and mechanical properties of epoxy

IF 2.8 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal Pub Date : 2025-01-28 DOI:10.1007/s13726-025-01455-5

Qiancheng Duan, Xiang Dong, Zhiyu Sun, Guowei Dai, De-long Li, Le Xie, Song Liu

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引用次数: 0

Abstract

A novel multifunctional flame-retardant DOPO-AS/M(OH)(OCH₃) (M = Co, Ni) was synthesized and incorporated into epoxy resin (EP) to prepare EP composites with enhanced flame retardancy and mechanical properties. Specifically, the DOPO-AS was synthesized using 3-aminopropyltriethoxysilane (APTES), salicylaldehyde (Salal), and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The 2D nanosheet M(OH)(OCH₃) was surface modified with DOPO-AS, thereby synthesizing the organic/inorganic nanohybrid DOPO-AS/M. The results showed that the addition of only 5% (by wt) DOPO-AS/M enabled EP to achieve the UL-94 of V-1 rating, with the limiting oxygen index (LOI) increasing from 28.7% to 31.0%. The thermogravimetric analysis (TGA) results demonstrated that the EP/DOPO-AS/M composite exhibited a significant enhancement in thermal stability compared to pure EP. Meanwhile, EP/DOPO-AS/M 5% composite showed significant reduction of 48.1%, 14.7%, 30.9%, and 22.7% in the peak heat release rate (pHRR), total heat release (THR), smoke production rate (SPR), and total smoke production (TSP), respectively. In addition, the tensile strength and elongation-at-break of the EP composite with 1% (by wt) DOPO-AS/M were increased by 13.5% and 3.2%, compared with pure EP. This work provides a novel and facile strategy for the simultaneous enhancement of flame retardancy and mechanical properties in EP composites, showing promising potential for practical applications.

Graphical Abstract

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一种新型DOPO-AS/M(OH)（OCH3）有机/无机纳米杂化材料，用于增强环氧树脂的阻燃性和力学性能

合成了一种新型多功能阻燃剂DOPO-AS/M(OH)(OCH3) (M = Co, Ni)，并将其掺入环氧树脂（EP）中，制备了具有增强阻燃性能和力学性能的EP复合材料。具体来说，DOPO- as是由3-氨基丙基三乙氧基硅烷（APTES）、水杨醛（Salal）和9,10-二氢-9-氧-10-磷菲-10-氧化物（DOPO）合成的。用DOPO-AS对二维纳米片M(OH)（OCH3）进行表面修饰，合成了有机/无机纳米杂化材料DOPO-AS/M。结果表明，添加5% (wt) DOPO-AS/M后，EP达到V-1级UL-94，极限氧指数（LOI）由28.7%提高到31.0%。热重分析（TGA）结果表明，与纯EP相比，EP/DOPO-AS/M复合材料的热稳定性有显著提高。EP/DOPO-AS/M 5%复合材料的峰值放热率（pHRR）、总放热率（THR）、产烟率（SPR）和总产烟率（TSP）分别降低了48.1%、14.7%、30.9%和22.7%。此外，与纯EP相比，添加1% DOPO-AS/M的EP复合材料的拉伸强度和断裂伸长率分别提高了13.5%和3.2%。这项工作为同时增强EP复合材料的阻燃性和力学性能提供了一种新颖而简便的策略，具有良好的实际应用潜力。图形抽象

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来源期刊

Iranian Polymer Journal 化学-高分子科学

CiteScore

4.90

自引率

9.70%

发文量

107

审稿时长

2.8 months

期刊介绍： Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.