Preparation of stearic acid/halloysite nanotube composite as form-stable PCM for thermal energy storage

Abstract

SUMMARYA novel form-stable composite as phase change material (PCM) for thermal energy storage was prepared by absorbing stearic acid (SA) into halloysite nanotube (HNT). The composite PCM was characterized by TEM, FT-IR and DSC analysis techniques. The composite can contain SA as high as 60 wt% and maintain its original shape perfectly without any SA leakage after subjected to 50 melt-freeze cycles. The melting temperature and latent heat of composite (SA/HNT: 60/40 wt%) were determined as 53.461C and 93.97 J g À1 by DSC. Graphite was added into the SA/HNT composite to improve thermal storage performance, and the melting time and freezing time of the composite were reduced by 65.3 and 63.9%, respectively. Because of its high adsorption capacity of SA, high heat storage capacity, good thermal stability, low cost and simple preparation method, the composite can be considered as cost-effective latent heat storage material for practical application.

Properties and applications of halloysite nanotubes: recent research advances and future prospects

“…Based on its molar mass also called molar weight (MW), guests loaded on Hal could be listed in either of the following categories: i) low MW substances with MW b 300 g/mol, e.g., propranolol hydrochloride (Levis and Deasy, 2003), 5-aminosalicylic (Viseras et al, 2008(Viseras et al, , 2009Aguzzi et al, 2013), benzotriazole (Shchukin and Mohwald, 2007;Abdullayev et al, 2009;Abdullayev and Lvov, 2010), 8-hydroxyquinoline (Fix et al, 2009), glycerol (Suh et al, 2011), stearic acid (Mei et al, 2011a), capric acid (Mei et al, 2011b), resveratrol (Vergaro et al, 2012), ibuprofen (Tan et al, , 2014b, and 5-fluorouracil (Rao et al, 2014); ii) medium MW substances with 300 g/mol b MW b 1000 g/mol, e.g., dexamethasone, furosemide, nifedipine (Veerabadran et al, 2007(Veerabadran et al, , 2009, fentanyl (Forsgren et al, 2010), doxorubicin (Mitchell et al, 2012), and orange II (Yuan et al, 2012b); iii) high MW substances with MW N 1000 g/mol, e.g., metalloporphyrins (Machado et al, 2008), α-amylase , urease (Shchukin et al, 2005;Zhai et al, 2010), antisense oligonucleotides (Shi et al, 2011), and insulin .…”

Fabrication and characterization of novel shape-stabilized stearic acid composite phase change materials with tannic-acid-templated mesoporous silica nanoparticles for thermal energy storage

“…Furthermore, in spectrum of pure stearic acid, there were adsorption peaks at 2917 cm À1 and 2849 cm À1 which represented the aliphatic C-H vibration. 29 The peak at 1704 cm À1 was assigned to the characteristic stretching vibration of the C]O groups and the band at 1472 cm À1 could correspond to the C-O bending peak. 29,30 Moreover, the peak at 719 cm…”

Preparation of Robust Superhydrophobic Halloysite Clay Nanotubes via Mussel-Inspired Surface Modification

“…To combat this drawback, various porous materials have been exploited as package substrates for preparing form-stable PCM composites [55]. Halloysite as a kind of natural nanomaterial has the advantages of low cost, easy accessibility, and high porosity, which can be used as a packaging material to absorb PCMs [56]. However, its original hydrophilic property makes it incompatible with the hydrophobic organic compounds.…”