Tuning the polycondensation of phosphazenes with ZIF-67 and its effects on UV/fire resistant epoxy composites

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

Construction and Building Materials Pub Date : 2025-02-17 DOI:10.1016/j.conbuildmat.2025.140439

Peng Lin , Yinjie Wang , Chuang Yu , Hao Wang , Kunpeng Song , Xue Bi , Jin Cao , Keshan Zhang , Ye-Tang Pan , Jiping Liu

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引用次数: 0

Abstract

Zeolite imidazole salt frame (ZIF-67) has a highly regular microporous structure, large specific surface and certain flame retardant properties, and 2-methylimidazole in it is very sensitive to protolation reaction, so ZIF-67 can be etched to get more properties. However, different etching methods often yield different results. So we use H⁺ produced by the synthesis of 2-aminopyrazine and hexachlorophosphazene (HCCP) to directly or synchronously etch ZIF-67. Two kinds of flame retardants with sugar-frosting structure and fig-like structure with UV shielding capability are designed and synthesized, and the two etching methods are compared. When 2.0 wt% flame retardant is added to epoxy resin system, the total heat release rate of EP/AHCTP epoxy composite is reduced by 29.4 %, the peak heat release rate of EP/CHCTP composite is reduced by 38.5 %, and the CO and CO₂ production of EP/CHCTP composite are reduced by 45.2 % and 40.1 %, respectively. The UV shielding performance is improved while the mechanical properties are maintained. In the background of the rapid development of MOFs modification research, we compare two methods of binding ZIF-67 with small molecule phosphazenes and suggest its potential application in flame retardancy and UV resistance of 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.