Topic
Thermogravimetric analysis
About: Thermogravimetric analysis is a research topic. Over the lifetime, 37248 publications have been published within this topic receiving 862144 citations. The topic is also known as: thermal gravimetric analysis & TGA.
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TL;DR: In this paper, the effects of lanthanum oxide (La2O3) as a synergistic agent on the flame retardancy of intumescent flame retardant polypropylene composites (IFR-PP) were studied, and the new IFR system mainly consisted of the charring-foaming agent (CFA) and ammonium polyphosphate (APP).
193 citations
TL;DR: In this article, a series of blends based on poly(ethylene oxide) (PEO) and sodium alginate (NaAlg) were prepared by solution casting method by using Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), tensile strength test, contact angle measurements and atomic force microscopy (AFM).
193 citations
TL;DR: In this article, the fabrication, physico-chemical characterizations and thermal properties of n-octadecane nanocapsules as organic PCM (phase change materials) for thermal energy storage were investigated.
193 citations
TL;DR: In this article, the thermal stability of surfactant-modified montmorillonites was analyzed using differential thermal analysis (DTA), thermogravimetric measurement (TG) and differential scanning calorimetry (DSC).
Abstract: The thermal stability of surfactant-modified clay plays a key role in the synthesis and processing of organoclay based nanocomposites. Differential thermal analysis (DTA), thermogravimetric measurement (TG) and differential scanning calorimetry (DSC) were used in this study to characterize the thermal stability of hexadecyltrimethylammonium bromide (HDTMAB) modified montmorillonites prepared at different surfactant concentrations. DSC shows that the molecular environment of the surfactant within the montmorillonite galleries is unique from that in the bulk state. The endothermic peak at 70-100 oC in the DTA curves of the modified montmorillonites is attributed to both the surfactant phase transformation and the loss of free and interlayer water. With an increase of surfactant packing density, the amount of water residing in the modified montmorillonite decreases gradually, reflecting the improvement of the hydrophobic property for organoclay. However, the increase of the surfactant packing density within the galleries leads to the decrease of the thermal stability of the organoclays.
With an increase of initial surfactant concentration for the preparation of organoclays, the surfactant packing density increases gradually to a "saturated" state. It was found that the cationic surfactant was introduced into the montmorillonite interlayer not only by cation exchange but also by physical adsorption.
192 citations
TL;DR: In this paper, the absolute capacity of the double hydroxides was increased by 62% using only 7 wt % graphene oxide (GO) as a support, and the experimental procedure for the synthesis of the materials is based on a direct precipitation of the LDH nanoparticles onto GO followed by a structural and physical characterization by electron microscopy, X-ray diffraction, thermogravimetric analysis, and Brunauer-Emmett-Teller (BET) surface area measurements.
Abstract: Layered double hydroxides (LDHs) show great potential as CO2 adsorbent materials, but require improvements in stability and CO2 adsorption capacity for commercial applications. In the current study, graphene oxide provides a light-weight, charge-complementary, two-dimensional (2D) material that interacts effectively with the 2D LDHs, in turn enhancing the CO2 uptake capacity and multicycle stability of the assembly. As a result, the absolute capacity of the LDH was increased by 62% using only 7 wt % graphene oxide (GO) as a support. The experimental procedure for the synthesis of the materials is based on a direct precipitation of the LDH nanoparticles onto GO followed by a structural and physical characterization by electron microscopy, X-ray diffraction, thermogravimetric analysis, and Brunauer-Emmett-Teller (BET) surface area measurements. Detailed titration confirmed the compatibility of the surface chemistry. After thermal decomposition, mixed metal oxides (MMOs) are obtained with the basic sites required for the CO2 adsorption. A range of samples with different proportions of GO/MMO were prepared, fully characterized, and correlated with the CO2 sorption capacity, established via TGA.
192 citations