Impact of conjugated polymer addition on the properties of paraffin-asphaltene blends for heat storage applications: Insight from computer modeling and experiment

被引：0

作者：

Larin, S. V. ^{[1
]}

Makarova, V. V. ^{[1
,2
]}

Gorbacheva, S. N. ^{[1
,2
]}

Yakubov, M. R. ^{[3
]}

Antonov, S. V. ^{[1
,2
]}

Borzdun, N. I. ^{[1
]}

Glova, A. D. ^{[1
]}

Nazarychev, V. M. ^{[1
]}

Gurtovenko, A. A. ^{[1
]}

Lyulin, S. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Macromol Cpds, olshoi Prospect VO 31 St, St Petersburg, Russia

[2] Russian Acad Sci, AV Topchiev Inst Petrochem Synth, Leninsky pr 29, Moscow, Russia

[3] Russian Acad Sci, Fed Res Ctr Kazan Sci Ctr, Lobachevskogo Str 2/31, Kazan 420111, Russia

来源：

JOURNAL OF CHEMICAL PHYSICS | 2022年 / 157卷 / 19期

基金：

俄罗斯科学基金会;

关键词：

PHASE-CHANGE MATERIALS; THERMAL-ENERGY STORAGE; MOLECULAR-DYNAMICS SIMULATION; CONDUCTIVITY ENHANCEMENT; IRREVERSIBLE-PROCESSES; RHEOLOGICAL PROPERTIES; KAPPA-CARRAGEENAN; CHARGE-TRANSFER; P3HT; POLY(3-HEXYLTHIOPHENE);

D O I：

10.1063/5.0122116

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Adding carbon nanoparticles into organic phase change materials (PCMs) such as paraffin is a common way to enhance their thermal conductivity and to improve the efficiency of heat storage devices. However, the sedimentation stability of such blends can be low due to aggregation of aromatic carbon nanoparticles in the aliphatic paraffin environment. In this paper, we explore whether this important issue can be resolved by the introduction of a polymer agent such as poly(3-hexylthiophene) (P3HT) into the paraffin-nanoparticle blends: P3HT could ensure the compatibility of aromatic carbon nanoparticles with aliphatic paraffin chains. We employed a combination of experimental and computational approaches to determine the impact of P3HT addition on the properties of organic PCMs composed of paraffin and carbon nanoparticles (asphaltenes). Our findings clearly show an increase in the sedimentation stability of paraffin-asphaltene blends, when P3HT is added, through a decrease in average size of asphaltene aggregates as well as in an increase of the blends' viscosity. We also witness the appearance of the yield strength and gel-like behavior of the mixtures. At the same time, the presence of P3HT in the blends has almost no effect on their thermophysical properties. This implies that all properties of the blends, which are critical for heat storage applications, are well preserved. Thus, we demonstrated that adding polyalkylthiophenes to paraffin-asphaltene mixtures led to significant improvement in the performance characteristics of these systems. Therefore, the polymer additives can serve as promising compatibilizers for organic PCMs composed of paraffins and asphaltenes and other types of carbon nanoparticles. Published under an exclusive license by AIP Publishing.

引用

页数：19