Polyethylene Glycol-Mediated Synthesis of Cu-MOF and Its Flame-Retardant Mechanism on Phase Change Energy Storage Wood

GUO Xi; ZHANG Jiahao; YANG Chen; HU Jiajun; REN Yuting; SUN Weisheng

doi:10.12326/j.2096-9694.2026060

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Polyethylene Glycol-Mediated Synthesis of Cu-MOF and Its Flame-Retardant Mechanism on Phase Change Energy Storage Wood
College of Chemistry and Materials Engineering，Zhejiang A&F University，Hangzhou 311300，Zhejiang，China
Vol. 40, Issue 3, Pages: 30-37(2026)
DOI： 10.12326/j.2096-9694.2026060
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郭玺,张家豪,杨晨等.聚乙二醇诱导合成Cu-MOF及其对相变储能木材的阻燃机制[J].木材科学与技术,2026,40(03):30-37. DOI： 10.12326/j.2096-9694.2026060.

GUO Xi,ZHANG Jiahao,YANG Chen,et al.Polyethylene Glycol-Mediated Synthesis of Cu-MOF and Its Flame-Retardant Mechanism on Phase Change Energy Storage Wood[J].Chinese Journal of Wood Science and Technology,2026,40(03):30-37. DOI： 10.12326/j.2096-9694.2026060.

摘要

为解决相变储能木材在建筑应用中的火灾隐患问题，针对金属有机框架（metal-organic frameworks，MOFs）在相变材料中难分散、易团聚、浸渍改性效果差等难题，提出一种基于相变介质的MOFs诱导合成策略，以聚乙二醇（polyethylene glycol，PEG）2000同时作为反应溶剂和相变单元，将MOFs的合成和分散过程合二为一，制备Cu-MOF/PEG。分别采用PEG2000和Cu-MOF/PEG浸渍轻木（

Ochroma lagopus

）木材，获得相变储能木材（PEG/DW）和阻燃相变储能木材（Cu-MOF/PEG/DW）。结果表明，Cu-MOF在PEG中成功合成，Cu-MOF/PEG的晶体结构、粒径和形貌与采用传统溶剂N，N-二甲基甲酰胺（N

N-Dimethylformamide，DMF）溶剂合成的Cu-MOF

（DMF）

一致；PEG2000和Cu-MOF/PEG均能有效填充木材孔隙，Cu元素在Cu-MOF/PEG/DW中分布均匀。由于Cu-MOF/PEG/DW的增重率比PEG/DW降低35.6%（

0.05），Cu-MOF/PEG/DW的熔融和结晶热焓值降低至113.5 J/g和108.8 J/g，结晶和熔融的相变温度分别降低1.7 ℃和1.3 ℃，热焓值和相变温度变化较小，仍具备优异的相变储热能力；增重率降低也导致Cu-MOF/PEG/DW表面升温时间较PEG/DW减少了35 s。由于Cu元素及有机配体中含氮基团的协同阻燃抑烟作用，Cu-MOF/PEG/DW的极限氧指数较PEG/D

W提升29.8%（

＜0.05）；在锥形量热仪600 s测试周期内，其热释放总量下降17%，烟释放总量降低91.7%，燃烧无滴落现象。研究克服MOFs与相变储能木材难以高效复合的技术瓶颈，为制备兼具良好储热性能和火灾安全性的绿色节能建材提供新途径。

Abstract

This study proposed a new metal-organic frameworks (MOFs) synthesis strategy based on phase change media to solve the fire hazards associated with phase change energy storage wood in building applications and address challenges such as poor dispersibility

aggregation tendency

and ineffective impregnation modification of MOFs in phase change materials. By using polyethylene glycol (PEG) 2000 simultaneously as both a reaction solvent and phase change unit

the synthesis and dispersion of MOFs were integrated into a single process

enabling the preparation of Cu-MOF/PEG.

Ochroma lagopus

was then impregnated with PEG 2000 and Cu-MOF/PEG to produce phase change energy storage wood (PEG/DW) and flame-retardant phase change energy storage wood (Cu-MOF/PEG/DW)

respectively. Results showed that Cu-MOF was successfully synthesized within PEG

exhibiting well-defined crystalline structures

with particle size and morphology consistent with Cu-MOF synthesized using the conventional solvent N

N-dimethylformamide. Both PEG 2000 and Cu-MOF/PEG were effectively filled into wood pores

and copper elements were uniformly distributed in Cu-MOF/PEG/DW. Due to the 35.6% lower weight gain rate of Cu-MOF/PEG/DW than PEG/DW

the melting and crystallization enthalpies decreased to 113.5 and 108.8 J/g

respectively

and the crystallization and melting temperatures decreased by 1.7 ℃ and 1.3 ℃

respectively. The slight decrease in enthalpy and phase transition temperature indicated that Cu-MOF/PEG/DW still exhibited excellent phase change heat storage capacity. The lower weight gain also reduced the surface heating time by 35 s compared with PEG/DW. In addition

the synergistic flame-retardant and smoke-suppressing effects of Cu and nitrogen-containing groups in organic ligands increased the limiting oxygen

index (LOI) of Cu-MOF/PEG/DW by 29.8% (

＜0.05). During the 600 s cone calorimeter test

the total heat release decreased by 17%

total smoke release reduced by 91.7%

and no dripping occurred during combustion. This research overcame the technical barrier of efficiently combining MOFs with phase change energy storage wood

offering a new method for developing green

energy-efficient building materials with excellent thermal storage performance and enhanced fire safety.

关键词

Keywords

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