用于结构-功能一体化应用的含微胶囊相变材料的碳纳米管改性水泥浆体的开发。

Development of carbon nanotube modified cement paste with microencapsulated phase-change material for structural-functional integrated application.

作者信息

Cui Hongzhi, Yang Shuqing, Memon Shazim Ali

机构信息

Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, China.

Department of Civil and Environmental Engineering, School of Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China.

出版信息

Int J Mol Sci. 2015 Apr 10;16(4):8027-39. doi: 10.3390/ijms16048027.

DOI:10.3390/ijms16048027

PMID:25867476

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4425065/

Abstract

Microencapsulated phase-change materials (MPCM) can be used to develop a structural-functional integrated cement paste having high heat storage efficiency and suitable mechanical strength. However, the incorporation of MPCM has been found to degrade the mechanical properties of cement based composites. Therefore, in this research, the effect of carbon nanotubes (CNTs) on the properties of MPCM cement paste was evaluated. Test results showed that the incorporation of CNTs in MPCM cement paste accelerated the cement hydration reaction. SEM micrograph showed that CNTs were tightly attached to the cement hydration products. At the age of 28 days, the percentage increase in flexural and compressive strength with different dosage of CNTs was found to be up to 41% and 5% respectively. The optimum dosage of CNTs incorporated in MPCM cement paste was found to be 0.5 wt %. From the thermal performance test, it was found that the cement paste panels incorporated with different percentages of MPCM reduced the temperature measured at the center of the room by up to 4.6 °C. Inverse relationship was found between maximum temperature measured at the center of the room and the dosage of MPCM.

摘要

微胶囊相变材料（MPCM）可用于开发具有高蓄热效率和合适机械强度的结构功能一体化水泥浆体。然而，已发现掺入MPCM会降低水泥基复合材料的力学性能。因此，在本研究中，评估了碳纳米管（CNT）对MPCM水泥浆体性能的影响。试验结果表明，在MPCM水泥浆体中掺入CNT加速了水泥水化反应。扫描电子显微镜照片显示，CNT紧密附着在水泥水化产物上。在28天龄期时，发现不同剂量CNT的抗折强度和抗压强度分别提高了41%和5%。发现MPCM水泥浆体中CNT的最佳剂量为0.5 wt%。从热性能测试中发现，掺入不同比例MPCM的水泥浆体面板使房间中心测得的温度降低了4.6°C。发现房间中心测得的最高温度与MPCM的剂量呈反比关系。