Thermochimica Acta最新文献

Catalytic thermal decomposition of ammonium perchlorate based on synergistic effect of CuCr2O4/CNTs composite particles prepared by ball milling 球磨CuCr2O4/CNTs复合颗粒协同作用下高氯酸铵的催化热分解

IF 3.5 2区化学

Thermochimica Acta Pub Date : 2025-07-31 DOI: 10.1016/j.tca.2025.180086

Jinbin Zou, Yang Qin, Yadan Wang, Xiandie Zhang, Kunquan Duan, Fengsheng Li, Jie Liu

{"title":"Catalytic thermal decomposition of ammonium perchlorate based on synergistic effect of CuCr2O4/CNTs composite particles prepared by ball milling","authors":"Jinbin Zou, Yang Qin, Yadan Wang, Xiandie Zhang, Kunquan Duan, Fengsheng Li, Jie Liu","doi":"10.1016/j.tca.2025.180086","DOIUrl":"10.1016/j.tca.2025.180086","url":null,"abstract":"<div><div>CuCr<sub>2</sub>O<sub>4</sub>/CNTs composite particles were prepared by ball milling method as thermal decomposition catalyst of ammonium perchlorate (AP). The structure, morphology and uniformity of the samples were characterized by SEM, EDS, Raman, XRD, XPS and BET method. The results showed that the CuCr<sub>2</sub>O<sub>4</sub>/CNTs (Cu/C) composite particles obtained an increased specific surface area and were evenly coated on the surface of AP. The results of TG-DSC test showed that the catalytic performance is best when the mass ratio of CuCr<sub>2</sub>O<sub>4</sub> to CNTs is 1: 1, which significantly reduced the high temperature decomposition peak temperature (T<sub>H</sub>) and activation energy (E<sub>a</sub>) of pure AP. The catalytic effect of Cu/C composite catalyst is significantly better than that of single CuCr<sub>2</sub>O<sub>4</sub> or CNTs catalyst. These results indicate that using Cu/C composite particles as a new catalyst to catalyze the thermal decomposition of AP has very important research value in the AP-based composite propellants.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"751 ","pages":"Article 180086"},"PeriodicalIF":3.5,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on arrangement principles and optimization of a battery thermal management system with double-layer PCMs under summer conditions 夏季条件下双层pcm电池热管理系统布置原理及优化研究

IF 3.5 2区化学

Thermochimica Acta Pub Date : 2025-07-30 DOI: 10.1016/j.tca.2025.180085

Jing Wang, Qinghong Zhang, Yi Zhang, Junrui Shi, Dan Zhou

{"title":"Research on arrangement principles and optimization of a battery thermal management system with double-layer PCMs under summer conditions","authors":"Jing Wang, Qinghong Zhang, Yi Zhang, Junrui Shi, Dan Zhou","doi":"10.1016/j.tca.2025.180085","DOIUrl":"10.1016/j.tca.2025.180085","url":null,"abstract":"<div><div>This study investigates the internal and external arrangement principles of phase change materials (PCMs) and the optimization of their thermophysical properties in a double-layer PCM-based battery thermal management system (BTMS) using numerical methods. The results show that the arrangement strategy of low-temperature PCMs close to the battery and high-temperature PCMs at the convective heat transfer boundary can improve the thermal regulation performance of the system. The thermal conductivity of the internal PCM layer has a decisive influence on the system temperature control. Under typical summer conditions, the optimal thermal conductivities of the internal and external PCM layers are 4.8 W/(m·K) and 2.8 W/(m·K), respectively. In addition, without additional active cooling, the optimal thickness ratio of high-temperature and low-temperature PCM layers is approximately 3:1. This study proposes three basic design principles for the passive double-layer PCM-BTMS under summer conditions, including the gradient material layout strategy, the optimization approach of PCM thermophysical properties and the optimal proportion relationship of two PCM layers. These criteria not only provide systematic theoretical guidance for the optimal design of the double-layer PCM-based BTMS, but also lay an important technical foundation for the development of high performance multi-layer PCM-based BTMS.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"751 ","pages":"Article 180085"},"PeriodicalIF":3.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploration of the thermal behavior, variable-temperature powder X-ray diffraction patterns, and evolved gas analysis during decomposition in oxygen and nitrogen atmospheres of nalidixic acid complexes with Tb(III), Dy(III), and Ho(III) ions 探索钠二酸配合物与Tb（III）、Dy（III）和Ho（III）离子在氧和氮气氛中分解时的热行为、变温粉末x射线衍射图和演化气体分析

IF 3.5 2区化学

Thermochimica Acta Pub Date : 2025-07-26 DOI: 10.1016/j.tca.2025.180083

Małgorzata Kosińska-Pezda , Urszula Maciołek , Lidia Zapała , Łukasz Byczyński , Elżbieta Woźnicka

{"title":"Exploration of the thermal behavior, variable-temperature powder X-ray diffraction patterns, and evolved gas analysis during decomposition in oxygen and nitrogen atmospheres of nalidixic acid complexes with Tb(III), Dy(III), and Ho(III) ions","authors":"Małgorzata Kosińska-Pezda , Urszula Maciołek , Lidia Zapała , Łukasz Byczyński , Elżbieta Woźnicka","doi":"10.1016/j.tca.2025.180083","DOIUrl":"10.1016/j.tca.2025.180083","url":null,"abstract":"<div><div>Three new solid lanthanide complexes with nalidixic acid (HNal) were previously synthesized, exhibiting the following stoichiometry: Tb(Nal)₃·5.5H₂O, Dy(Nal)₃·5.5H₂O and Ho(Nal)₃·5.5H₂O. In the present work, thermal behavior of these complexes in air and nitrogen atmospheres were characterized comprehensively using a combination of several methods: TG-DSC, EGA-FTIR-MS, VT-PXRD, and SEM-EDX.</div><div>The thermal decomposition pathways between the complexes were similar, but they varied between oxidative and pyrolysis atmospheres. The registered in air simultaneous TG/DTG-DSC curves and variable-temperature diffraction patterns showed that the complexes thermal degradation ended at 1273 K, resulting in the formation of Tb<sub>4</sub>O<sub>7</sub>, Dy<sub>2</sub>O<sub>3</sub> or Ho<sub>2</sub>O<sub>3</sub> as the final solid products. In contrast, the degradation of the compounds in a nitrogen atmosphere did not complete by 1273 K, leading to the probable formation of a mixture of lanthanide oxides, lanthanide oxycarbonates, soot, and lanthanide nitrides as intermediate solid products at around 1073 K during pyrolysis.</div><div>Using the combined TG-FTIR-MS techniques, the primary gaseous products released during thermal decomposition were identified. In air, these gases included H<sub>2</sub>O, CO<sub>2</sub>, CO, NO<sub>x</sub>, and NH<sub>3</sub>. When analyzed in a nitrogen atmosphere, the gaseous products included H<sub>2</sub>O, CO<sub>x</sub>, NH<sub>3</sub>, and a mix of C<sub>x</sub>H<sub>y</sub> resulting from the breakdown of the nalidixate ligand.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"751 ","pages":"Article 180083"},"PeriodicalIF":3.5,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cathode shape determines efficiency and arc-root attachment in thermal plasma torch – A numerical investigation 阴极形状决定热等离子体炬的效率和弧根附着——数值研究

IF 3.5 2区化学

Thermochimica Acta Pub Date : 2025-07-24 DOI: 10.1016/j.tca.2025.180082

Akash Yadav , V.R. Barath , Satyananda Kar , Mayank Kumar

引用次数: 0

Temperature-dependent kinetics of AAPH decomposition and peroxyl radical generation in aqueous media for oxidative stress studies 氧化应激研究中AAPH分解和过氧自由基生成的温度依赖动力学

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2025-07-23 DOI: 10.1016/j.tca.2025.180079

K.K. Wojtanowski , R. Sawicki

引用次数: 0

Thermodynamic and cytotoxicity studies of doxorubicin loaded by DNA tetrahedron nanostrings DNA四面体纳米链负载阿霉素的热力学和细胞毒性研究

IF 3.5 2区化学

Thermochimica Acta Pub Date : 2025-07-23 DOI: 10.1016/j.tca.2025.180081

Xiangtai Wang , Yushu Wu , Xinpeng Zhang, Jie Liu, Lixia Yuan, Min Liu

{"title":"Thermodynamic and cytotoxicity studies of doxorubicin loaded by DNA tetrahedron nanostrings","authors":"Xiangtai Wang , Yushu Wu , Xinpeng Zhang, Jie Liu, Lixia Yuan, Min Liu","doi":"10.1016/j.tca.2025.180081","DOIUrl":"10.1016/j.tca.2025.180081","url":null,"abstract":"<div><div>In this study, a DNA tetrahedron nanostring structure (TetraNS) was constructed through DNA tetrahedron-based hybridization chain reaction, which demonstrated superior doxorubicin (DOX) loading capacity and enhanced targeted therapeutic efficacy compared to a conventional DNA tetrahedron (DNATetra). Calorimetric and spectroscopic results demonstrated that TetraNS possessed stronger drug binding affinity and loading capacity than DNATetra. Differential scanning calorimetry studies confirmed the intercalation of DOX significantly enhanced the stability of TetraNS. <em>In vitro</em> release studies demonstrated DNase I-responsive DOX release behavior, with TetraNS showing more pronounced enzyme-triggered release kinetics. Cytotoxicity and cellular uptake assays showed that MUC1 aptamer-modified DNATetra/TetraNS enhanced the anticancer efficacy of DOX against MCF-7 cells, with TetraNS exhibiting a more pronounced effect. These findings demonstrate that TetraNS is a promising DNA-based nanocarrier with high drug-loading capacity, enzyme responsiveness, and active targeting for precise chemotherapy.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"751 ","pages":"Article 180081"},"PeriodicalIF":3.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamic properties of renewable n-butanol: Experimental and modeling investigations 可再生正丁醇的热力学性质：实验和模型研究

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2025-07-22 DOI: 10.1016/j.tca.2025.180080

Lingyan Gui , Jian Yang , Guoliang Yu , Jiangtao Wu , Xianyang Meng

{"title":"Thermodynamic properties of renewable n-butanol: Experimental and modeling investigations","authors":"Lingyan Gui , Jian Yang , Guoliang Yu , Jiangtao Wu , Xianyang Meng","doi":"10.1016/j.tca.2025.180080","DOIUrl":"10.1016/j.tca.2025.180080","url":null,"abstract":"<div><div>As a renewable and environmentally friendly alternative and additive to traditional fuels, <em>n</em>-butanol holds significant potential for mitigating future energy shortages and reducing environmental pollution. A comprehensive understanding of the thermodynamic properties of <em>n</em>-butanol is crucial for industrial applications and scientific research. In this study, the vapor <em>pvT</em> properties and isobaric heat capacity for <em>n</em>-butanol were measured using a Burnett apparatus and a flow calorimeter, respectively, in the temperature range of (298.15 to 598.15) K and at pressures up to 15 MPa. The obtained results, along with existing databases, were employed to develop a comprehensive thermodynamic model for <em>n</em>-butanol. Two different improvements were proposed to adjust the realistic contributions of association volume and radial distribution function to the association strength of alcohols. A comparison revealed that the improved PC-SAFT models in our work outperformed those from previous research. Notably, PC-SAFT equation of state modified on radial distribution function combined with the 3B model, demonstrated superior predictive performance, which could reproduce vapor pressure, density and heat capacity with the absolute average deviations of 1.06 %, 0.47 % and 2.41 %, respectively.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"751 ","pages":"Article 180080"},"PeriodicalIF":3.1,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calorimetric signature of Johari–Goldstein relaxation in fast-quenched As2Se3 快淬As2Se3中Johari-Goldstein弛豫的量热特征

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2025-07-19 DOI: 10.1016/j.tca.2025.180067

Muhammad Umair , Francesco Dallari , Jacopo Baglioni , Andrea Piarristeguy , Giulio Monaco

{"title":"Calorimetric signature of Johari–Goldstein relaxation in fast-quenched As2Se3","authors":"Muhammad Umair , Francesco Dallari , Jacopo Baglioni , Andrea Piarristeguy , Giulio Monaco","doi":"10.1016/j.tca.2025.180067","DOIUrl":"10.1016/j.tca.2025.180067","url":null,"abstract":"<div><div>The Johari–Goldstein or <span><math><mi>β</mi></math></span> relaxation has a clear spectroscopic signature in fragile glass-formers, including many organic and metallic systems, while is less or not at all visible in strong glass-formers, including most network-forming systems as oxides and chalcogenides. This is often related to the reduced structural heterogeneity characteristic of strong glasses. We here study the chalcogenide glass As<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>Se<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> using a fast-scanning calorimeter. We show that, while slowly cooled samples show indeed no clear evidence of <span><math><mi>β</mi></math></span> relaxation, a sample fast-quenched from the melt shows instead a clear evidence of it. We have performed enthalpy relaxation experiments to evaluate the activation energy of such relaxation, and the obtained results conform to the accepted value for the activation energy of the <span><math><mi>β</mi></math></span> relaxation. Fast-quenching can then be a tool to study the <span><math><mi>β</mi></math></span> relaxation also in chalcogenide glasses.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"752 ","pages":"Article 180067"},"PeriodicalIF":3.1,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation between dynamic-mechanical properties and kinetic parameters of unsaturated polyester resin/reduced graphene oxide nanocomposites 不饱和聚酯树脂/还原氧化石墨烯纳米复合材料动态力学性能与动力学参数的关系

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2025-07-19 DOI: 10.1016/j.tca.2025.180078

Neda Yavari, Fatemeh Bashipour, Mehdi Poorabdollah

{"title":"Correlation between dynamic-mechanical properties and kinetic parameters of unsaturated polyester resin/reduced graphene oxide nanocomposites","authors":"Neda Yavari, Fatemeh Bashipour, Mehdi Poorabdollah","doi":"10.1016/j.tca.2025.180078","DOIUrl":"10.1016/j.tca.2025.180078","url":null,"abstract":"<div><div>The effect of adding 0.5% by mass of reduced graphene oxide (RGO) particles on curing kinetics and dynamic-mechanical properties of unsaturated polyester resin (UP) was investigated. The trapping of free radicals by RGO double bonds increased the activation energy (E) of UP containing 0.5% by mass of RGO (UPRGO 0.5) compared to the Neat UP system. The high contact surface of RGO particles weakened the diffusion phenomenon (diff-phen) in curing kinetic study of resin containing RGO particles (Considering the impact on the number of collisions). DMA results showed that the proportional adsorption of styrene and UP resin chains between RGO particles, along with the evaluation of Tanδ curves, could reveal a network structure in the pure resin and UPRGO that is strikingly similar.</div><div>The simultaneous presence of polar groups on the surface of RGO particles, along with the cyclic structure of RGO, led to the proportional adsorption of UP resin components, UP resin chains and styrene molecules, between the RGO particles. A kind of correlation between the results of kinetic calculations and the DMA results from the point of view of the network structure was observed.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"752 ","pages":"Article 180078"},"PeriodicalIF":3.1,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aging-induced phase transformations in CuAlMnAgZr multicomponent alloys: The effect of Zr in phase evolution 时效诱导CuAlMnAgZr多组分合金相变：Zr在相变中的作用

IF 3.1 2区化学

Thermochimica Acta Pub Date : 2025-07-16 DOI: 10.1016/j.tca.2025.180077

C.B. Pilz, R.D.A. Pinto, R.A.G. Silva

引用次数: 0