形状稳定化聚乙二醇-二氧化硅的扩散作为生产调温饰面砖的驱动因素

Diffusion of Shape Stabilized PEG-SiO as a Driver for Producing Thermoregulating Facing Bricks.

作者信息

Serrano Angel, Borreguero Ana M, Iglesias Isabel, Acosta Anselmo, Rodríguez Juan F, Carmona Manuel

机构信息

Centro de Investigación Cooperativa de Energías Alternativas (CIC energiGUNE), Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Alava, Albert Einstein 48, 01510 Vitoria-Gasteiz, Spain.

Institute of Chemical and Environmental Technologies, Department of Chemical Engineering, University of Castilla-La Mancha, Av. Camilo José Cela s/n, 13004 Ciudad Real, Spain.

出版信息

Materials (Basel). 2021 Mar 13;14(6):1395. doi: 10.3390/ma14061395.

DOI:10.3390/ma14061395

PMID:33805604

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8001896/

Abstract

A novel form-stable phase-change material (PCM) based on facing bricks was developed by incorporating thermoregulating PEG-SiO, synthetized by sol-gel method and based on polyethylene glycol as phase-change material and silica as stabilizer compound. The PEG-SiO in its liquid form () is firstly adsorbed inside the porous brick and lastly stabilized () by controlling its gelation time, obtaining form-stable PCMs with PEG-SiO contents within 15-110 wt.%. Kinetic adsorption curves of the into bricks having different porosities as well as maximum adsorption capacities were obtained. The effective diffusion coefficients () were estimated by means of Fick's second law, it being possible to predict the adsorption of PEG-SiO by the brick as function of its porosity and the free diffusion coefficient. Finally, form-stable PCMs demonstrated an improvement in their thermal energy storage capacity (up to 338%), these materials being capable of buffering the indoor temperature during an entire operational day.

摘要

通过掺入通过溶胶 - 凝胶法合成的、以聚乙二醇为相变材料和二氧化硅为稳定剂化合物的调温PEG-SiO，开发了一种基于面砖的新型形状稳定相变材料（PCM）。液态的PEG-SiO首先被吸附在多孔砖内部，最后通过控制其凝胶化时间使其稳定，从而获得PEG-SiO含量在15 - 110 wt.%范围内的形状稳定PCM。获得了PEG-SiO在具有不同孔隙率的砖中的动力学吸附曲线以及最大吸附容量。通过菲克第二定律估算了有效扩散系数，从而能够预测砖对PEG-SiO的吸附与其孔隙率和自由扩散系数的函数关系。最后，形状稳定的PCM表现出其热能存储能力的提高（高达338%），这些材料能够在整个运行日缓冲室内温度。