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用于相变环氧共混物的碳纳米管蜡限制

Wax Confinement with Carbon Nanotubes for Phase Changing Epoxy Blends.

作者信息

Fredi Giulia, Dorigato Andrea, Fambri Luca, Pegoretti Alessandro

机构信息

Department of Industrial Engineering, University of Trento, via Sommarive 9, 38123 Trento, Italy.

National Interuniversity Consortium for Science and Technology of Materials (INSTM), Via G. Giusti 9, 50121 Firenze, Italy.

出版信息

Polymers (Basel). 2017 Aug 31;9(9):405. doi: 10.3390/polym9090405.

DOI:10.3390/polym9090405
PMID:30965709
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6418604/
Abstract

A paraffin wax was shape stabilized with 10 wt % of carbon nanotubes (CNTs) and dispersed in various concentrations in an epoxy resin to develop a novel blend with thermal energy storage capabilities. Thermogravimetric analysis showed that CNTs improve the thermal stability of paraffin, while differential scanning calorimetry showed that the paraffin kept its ability to melt and crystallize, with enthalpy values almost proportional to the paraffin fraction. In contrast, a noticeable loss of enthalpy was observed for epoxy/wax blends without CNTs, which was mainly attributed to the partial exudation of paraffin out of the epoxy matrix during the curing phase. Dynamic mechanical thermal analysis contributed to elucidate the effects of the melting of the paraffin phase on the viscoelastic properties of the epoxy blends. Flexural elastic modulus and strength of the blends decreased with the wax/CNT content according to a rule of mixtures, while flexural strain at break values deviate positively from it. These results show the potentialities of the investigated epoxy blends for the development of multifunctional structural composites.

摘要

一种石蜡用10重量%的碳纳米管（CNT）进行形状稳定化处理，并以不同浓度分散在环氧树脂中，以开发一种具有热能存储能力的新型共混物。热重分析表明，碳纳米管提高了石蜡的热稳定性，而差示扫描量热法表明，石蜡保持了其熔化和结晶的能力，焓值几乎与石蜡含量成正比。相比之下，对于不含碳纳米管的环氧/蜡共混物，观察到明显的焓损失，这主要归因于在固化阶段石蜡从环氧基体中部分渗出。动态力学热分析有助于阐明石蜡相的熔化对环氧共混物粘弹性性能的影响。根据混合法则，共混物的弯曲弹性模量和强度随蜡/碳纳米管含量的增加而降低，而断裂时的弯曲应变值则呈正偏差。这些结果表明，所研究的环氧共混物在开发多功能结构复合材料方面具有潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/d5b6a5fcc5d4/polymers-09-00405-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/9049d99b6b41/polymers-09-00405-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/08d35f182189/polymers-09-00405-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/2633ea858c9e/polymers-09-00405-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/1077dec1628d/polymers-09-00405-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/cdaa99fb1e20/polymers-09-00405-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/1c369c042ba7/polymers-09-00405-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/9f15faeb3d49/polymers-09-00405-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/dc30cbb3daa3/polymers-09-00405-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/1224a8015faf/polymers-09-00405-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/d5b6a5fcc5d4/polymers-09-00405-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/9049d99b6b41/polymers-09-00405-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/08d35f182189/polymers-09-00405-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/2633ea858c9e/polymers-09-00405-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/1077dec1628d/polymers-09-00405-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/cdaa99fb1e20/polymers-09-00405-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/1c369c042ba7/polymers-09-00405-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/9f15faeb3d49/polymers-09-00405-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/dc30cbb3daa3/polymers-09-00405-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/1224a8015faf/polymers-09-00405-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ec0/6418604/d5b6a5fcc5d4/polymers-09-00405-g010.jpg

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