通过协同催化碳化将 ZIF-67 衍生的铜钴层双氢氧化物/聚磷酸铵混合物用于高效阻燃环氧树脂

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-12 DOI:10.1016/j.conbuildmat.2024.139102

Yiwei Geng , Junxiu Piao , Xinliang Liu , Xilei Chen , Chuanmei Jiao

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引用次数: 0

摘要

聚磷酸铵（APP）是一种常用的商用阻燃剂。然而，将其应用于阻燃环氧树脂（EP）却面临着发烟量大和机械性能下降的问题。这大大限制了它在建筑材料领域的广泛应用。本研究以 ZIF-67 为桥，制备了高效阻燃 APP@M-LDH，并对其微观结构、化学成分和热稳定性进行了综合表征。由于APP和LDH的协同阻燃效应以及LDH结构中铜离子和钴离子在气相中的催化氧化作用，EP/4APP@M-LDH的峰值热释放率（PHRR）、总热释放率（THR）和总烟雾释放率（TSP）分别降低了34%、35.3%和40.3%，实现了EP的高效阻燃。此外，由于合成的 CuCo-LDH 具有三维结构，可以暴露出更多的氢键，因此 EP/4APP@M-LDH 的抗折强度和抗折模量分别显著提高了 54.1% 和 63.6%。这项研究为设计 EP 的高效阻燃剂提供了新思路。

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ZIF-67-derived CuCo-layered double hydroxide/ammonium polyphosphate hybrid for highly efficient flame retardant epoxy resin via synergistic catalytic carbonization

Ammonium polyphosphate (APP) has been commonly used as a commercial flame retardant. However, its application to flame-retardant epoxy resins (EP) has been faced with the problems of high smoke generation and degradation of mechanical properties. This has greatly limited its wide application in the field of building materials. In this work, a highly efficient flame retardant APP@M-LDH was prepared by using ZIF-67 as a bridge, and its microstructure, chemical composition, and thermal stability were comprehensively characterized. Due to the synergistic flame retardant effect of APP and LDH and the catalytic oxidation of copper and cobalt ions in the LDH structure in the gas phase, the peak heat release rate (PHRR), total heat release rate (THR) and total smoke release rate (TSP) of EP/4APP@M-LDH were reduced by 34 %, 35.3 % and 40.3 %, respectively, which achieved the high efficiency of flame retardancy for EP. In addition, due to the three-dimensional structure of the synthesized CuCo-LDH, which can expose more hydrogen bonds, the flexural strength and flexural modulus of EP/4APP@M-LDH were significantly increased by 54.1 % and 63.6 %, respectively. This study provides new ideas for the design of efficient flame retardants for EP.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.