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Production of Multifunctional Carbon Nanotubes for Sensor and Water Treatment Apolications
Published in Swamini Chopra, Kavita Pande, Vincent Shantha Kumar, Jitendra A. Sharma, Novel Applications of Carbon Based Nano-Materials, 2023
Kingsley I. John, Aderemi Timothy Adeleye, Abesa Solomon, A.A. Audu
Thermogravimetric analysis (TGA) is an analytical technique that monitors the weight shift when a sample is heated at a constant rate to assess a material’s thermal stability and a fraction of volatile components (Rajisha et al. 2011). Thermogravimetric analysis (TGA) is used to probe the purity and resilience of CNTs under high-temperature conditions. From the curve, residual mass, and oxidation, and initiation temperature can be estimated. The initiation temperature is simply the point where the material starts decomposing. The oxidation temperature is the maximum weight loss point, which correlates with the material’s thermal stability. The residual mass of material is subject to its consistency, aromatic bondings, and homogeneity. Figure 10 shows a TGA curve obtained in research executed by Liu et al. (2019). The incorporation of CNT to Fe2O3 was demonstrated to enhance the composite’s thermal stability, suggesting the significant role of CNTs.
An Insight into the Synthesis and Optoelectronic Properties of Thiophene-2,4,6-Triaryl Pyridine-Based D-A-D Type π-Conjugated Functional Materials
Published in Anandhan Srinivasan, Selvakumar Murugesan, Arunjunai Raj Mahendran, Progress in Polymer Research for Biomedical, Energy and Specialty Applications, 2023
For the material to use as a potent candidate in optoelectronic devices, it should be thermally stable. The thermogravimetric analysis (TGA) was used to determine the thermal stability of the material which measures the amount of weight change of the material as a function of temperature. It mainly provides information about the phase transitions and the thermal decompositions of the materials.
Synthesis and Characterization Techniques
Published in S. Harikrishnan, A.D. Dhass, Thermal Transport Characteristics of Phase Change Materials and Nanofluids, 2023
Thermogravimetric analysis (TGA) has the capacity to offer information such as the components of a multi-component system, the thermal stability of materials, the oxidative stability of materials, an estimation of the lifetime of a product, the breakdown kinetics of materials, moisture and volatile content of materials. The basic elements that are required to make this invention are a crucible that is used to contain the sample, a furnace that is capable of heating the sample to a high temperature, and a balance that continuously monitors the weight of the sample. The analytical balance is located outside the furnace chamber, and the test sample is placed in an alumina cup. Nanomaterial embedded PCMs were also tested, with a heating rate of 20°C/min and a cooling rate of 1 bar using nitrogen as the coolant. A total of 6.32 mg of samples were stored in an airtight aluminum pan.
Thermogravimetric analysis of flax, jute, and UHMWPE fibers and their composites with melamine and phenol formaldehyde resins
Published in Cogent Engineering, 2023
Srinivas Shenoy Heckadka, Raghuvir Pai Ballambat, Poornima Bhagavath, Manjeshwar Vijaya Kini, Rajeev K Sinha, M.K Sonali, Diya Sen
As far as synthetic fibres are concerned, E-glass, carbon and kevlar have shown good thermal stability with different resin systems. A synthetic fiber, namely Ultra High Molecular Weight Polyethylene (UHMWPE), is a long-chained polyolefin with molar mass ranging from 3 to 5 million. UHMWPE has superior tensile strength and chemical resistance in comparison to other materials (Chin et al., 2009; Forster et al., 2016). The high-performance characteristics make UHMWPE suitable for manufacturing protective clothing, bullet armlets, waterproof cloth, canvas, and filter materials. Despite its favourable properties, polyethylene is generally flexible and has a low glass transition temperature, even for UHMWPE (Berger et al., 2003; S. Gao & Zeng, 1993). Understanding the thermal degradation behaviour of natural and synthetic fibers is of prime importance for developing composites to be used as intermediate wall linings of the furnaces. Parameters such as composite moulding technique, curing time and temperature, reinforcements and resins used are very significant for good service life conditions of the material (Lotfi et al., 2021). One of the methods to interpret the composites thermal stability is by conducting a thermogravimetric analysis. Thermogravimetric analysis (TGA) gives us an understanding of the thermal stability of the composites, wherein the weight loss of samples is measured as a function of rising temperature. The greater the decomposition temperature of a sample, the more suitable it is for high-temperature applications (Monteiro et al., 2012).
Environmental sustainability in construction: Influence of Megaterium Bacteria on the durability and mechanical properties of concrete incorporating calcined clay
Published in Mechanics of Advanced Materials and Structures, 2023
Ashish Shukla, Nakul Gupta, Nanna Sri Ramya, Kuldeep K. Saxena, Amjad Iqbal, Faramarz Djavanroodi
TGA (Thermogravimetric analysis) is a type of thermal analysis that investigates changes in chemical & physical characteristics of materials as a function of rising temperature (with such a constant heating temperature rate) or time (with a constant/comfortable temperature and continuous losing weight) [62]. Chemical processes such as chemisorption, breakdown, and solid-gas reactions can also be studied using TGA. Figure 11 shows the results of a Thermogravimetric study of bacterial concrete specimens containing Bacillus Megaterium species immobilized using INMPs. With the particular chemical process, the thermal breakdown of pure calcite ranges from 600 to 800 degree celsius [63]. Figure 12 shows that the significant losing weight of 6.5% happened in the cited range of temperature of 600–750 degree celsius, which might be due to CaCO3 breakdown. This supports the idea that CaCO3 is Bio mineralized as a result of bacterial metabolic activity.
Preparation of hybrid meniscal constructs using hydrogels and acellular matrices
Published in Journal of Biomaterials Science, Polymer Edition, 2023
Gizem Zihna, Bengisu Topuz, Gülçin Günal, Halil Murat Aydin
Thermogravimetric analysis (TGA) determines the thermal stability of the material and the fraction of weight changes that occur in the sample when heated at a constant rate. Depending on the temperature increase, the % mass loss is an indicator of thermal degradation. In Figure 9, overlapped thermograms of the groups were given. It can be seen from the graph that the decomposition of the cross-linked groups occurred at relatively higher temperatures than in the untreated and decellularized tissue. The removal of absorbed water molecules from the samples was associated with the first degradation phase at 25-120 °C. Initial mass losses correlated with water loss were found at 10.44% in the untreated tissue, 11.59% in the decellularized group, 8.98% in the PG-Hybrid group, and 7.43% in the PGH-Hybrid group. The initial temperature of the second thermal degradation phase (Tonset) is generally seen between 285-294 °C in natural and decellularized ECM and ECM-based hybrid materials. The decomposition ratio of hybrid groups was lower than that of natural and decellularized groups at temperatures where thermal degradation reached 50%. Decellularized tissues decomposed at lower temperatures and this temperature increased with the addition of the 3rd polymer compared to the other hybrid structure. It can be seen from the graph that PG and PGH acellular scaffolds exhibited a second degradation at temperatures of 391 °C and 398 °C, respectively (Table 1,*). The decomposition temperatures of all groups were given in Table 1.