聚乙二醇诱导合成Cu-MOF及其对相变储能木材的阻燃机制

郭玺; 张家豪; 杨晨; 胡家俊; 任雨婷; 孙伟圣

doi:10.12326/j.2096-9694.2026060

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聚乙二醇诱导合成Cu-MOF及其对相变储能木材的阻燃机制
Polyethylene Glycol-Mediated Synthesis of Cu-MOF and Its Flame-Retardant Mechanism on Phase Change Energy Storage Wood
浙江农林大学化学与材料工程学院，浙江杭州 311300
2026年页码：1-9
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/OL]. 木材科学与技术, 2026,1-9. 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/OL]. Chinese Journal of Wood Science and Technology, 2026, 1-9. 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，针对金属有机框架材料（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）

，随后分别采用PEG2000和Cu-MOF

（PEG）

浸渍轻木（

Ochroma lagopus

）木材，获得了相变储能木材（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，其晶体结构规则，粒径和形貌与采用传统溶剂N，N-二甲基甲酰胺溶剂合成的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低35.6%（

0.05），Cu-MOF/PEG/DW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了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；得益于Cu元素的引入，表面升温速度较PEG/DW提升了35 s，有利于表面热量快速传递至内部；Cu元素及有机配体中含氮基团的协同阻燃抑烟作用，使Cu-MOF/PEG/DW的极限氧指数（limiting oxygen index，LOI）较PEG/DW提升了29.8%（

＜0.05）；锥形量热仪600 s测试周期内，其热释放总量下降了17%，烟释放总量降低了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

To solve the fire hazards associated with phase change energy storage wood in building applications

and to overcome challenges such as poor dispersibility

aggregation tendency

and ineffective impregnation modification of metal-organic frameworks (MOFs) in phase change materials

this study proposes a new MOFs synthesis strategy based on phase change media. By using polyethylene glycol (PEG) 2000 simultaneously as both a reaction solvent and phase change unit

the synthesis and dispersion of MOFs are 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 show that Cu-MOF was successfully synthesized within PEG

exhibiting well-defined crystalline structures

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

N-dimethylformamide. Both PEG 2000 and Cu-MOF

(PEG)

effectively filled the wood pores

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

the melting and crystallization enthalpies of Cu-MOF/PEG/DW decreased to 113.5 and 108.8 J/g

respectively; the phase transition temperatures of crystallization and melting decreased by 1.7 ℃ and 1.3 ℃

respectively. The decrease in enthalpy and phase transition temperature was small

and it still has excellent phase change heat storage capacity. Owing to the introduction of Cu

the surface heating response time was shortened by 35 s compared with PEG/DW

facilitating the rapid transfer of surface heat into the interior. In addition

the synergistic flame-retardant and smoke-suppressing effects of Cu and the nitrogen-containing groups in the organic ligands increased the limiting oxygen index (LOI) of Cu-MOF/PEG/DW by 29.8% compared with PEG/DW.(

＜0.05) compared to PEG/DW. During a 600 s cone calorimeter test

total heat release of Cu-MOF/PEG/DW decreased by 17%

total smoke release reduced by 91.7%

and no dripping occurred during combustion. This research overcomes the technical barrier of efficiently

combining MOFs with phase change energy storage wood

offering a new methods for developing green

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

关键词

Keywords

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