Materials Today Chemistry最新文献_第7页

Synergistic SiC/Co3O4 composites for enhanced microwave-assisted benzene catalytic removal performance 增强微波辅助苯催化去除性能的 SiC/Co3O4 复合材料协同作用

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-17 DOI: 10.1016/j.mtchem.2024.102243

Zhi Jiang, DongXu Fang, Haolin Luo, Zheng Ye, Hua Li, Wenfeng Shangguan

{"title":"Synergistic SiC/Co3O4 composites for enhanced microwave-assisted benzene catalytic removal performance","authors":"Zhi Jiang, DongXu Fang, Haolin Luo, Zheng Ye, Hua Li, Wenfeng Shangguan","doi":"10.1016/j.mtchem.2024.102243","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102243","url":null,"abstract":"Microwave-assisted catalysis is a promising technique for enhancing catalytic reactions through selective heating, potentially leading to improved reaction rates and energy efficiency. However, understanding the complex interactions between microwave absorption and catalytic performance in composite catalysts remains a challenge. In this study, Cobalt oxide(CoO)/silicon carbide(SiC) composite catalysts with varying SiC content were synthesized and characterized to investigate the relationship between their microwave absorption properties and catalytic performance. Quantitative analysis revealed that SiC and CoO absorb microwave energy through relaxation polarization and magnetic loss mechanisms, respectively. Increasing SiC content enhanced the dielectric and magnetic loss capabilities of the composites, with the CoO/SiC composite containing 10 wt% SiC (CoO/SiC-10) exhibiting a dielectric loss tangent of 3.87 and a minimum reflection loss of −35dB. However, higher SiC content decreased the surface chemically adsorbed oxygen, surface oxygen mobility, and benzene adsorption capacity, weakening the catalytic activity under conventional heating. The CoO/SiC-10 sample achieved a significantly better balance between microwave absorption and catalytic performance, significantly outperforming the original CoO sample under microwave irradiation. These founding establishes a quantitative research methodology that correlates dielectric loss tangent, reflection loss, and other crucial parameters with microwave absorption performance and further catalytic properties, providing insights for the rational design of catalysts that optimize both microwave absorption and catalytic activity.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204542","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

3D-printed MOF/MoS2 aerogel for dye adsorption and photocatalytic degradation 用于染料吸附和光催化降解的三维打印 MOF/MoS2 气凝胶

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-17 DOI: 10.1016/j.mtchem.2024.102248

Ana Laura M.M. Alves, Francisco V. dos Santos, Daniel S. Correa

{"title":"3D-printed MOF/MoS2 aerogel for dye adsorption and photocatalytic degradation","authors":"Ana Laura M.M. Alves, Francisco V. dos Santos, Daniel S. Correa","doi":"10.1016/j.mtchem.2024.102248","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102248","url":null,"abstract":"The escalating challenge of water resources contamination, attributed to toxic pollutants, requires urgent attention from both governments and society. Furthermore, the inefficacy of conventional water treatment methods emphasizes the critical necessity for exploring the development of affordable, renewable, and high-performance materials, which should, for instance, enable the mutual adsorption and photocatalytic degradation of organic pollutants. Here we employed the 3D printing technique to manufacture an aerogel based on alginate, gelatin, and carboxymethylcellulose incorporated with 5 and 7.5 wt % of MOF/MoS. FTIR spectra and EDS analysis evidenced the presence of MOF/MoS in the structure of the aerogels, while Helium pycnometer analysis and SEM micrographs demonstrated that the aerogels presented low density and a porous structure with porosity above 80 %. The swelling test showed that the aerogels displayed a high water absorption capacity (1400 %) after 70 h of immersion. The rheology test demonstrated that elastic behavior prevails over viscous behavior (G' > G″) and the incorporation of 7.5 wt % MOF/MoS favored shear thinning and viscosity recovery in the hydrogel. Adsorption tests to methylene blue (employed as a model) showed that the aerogel (HD) without the presence of MOF/MoS and the aerogels HD/MOF/MoS 5 % and MOF/MoS 7.5 % showed removal efficiencies of 16.77 %, 28.66 %, and 95.86 %, respectively. Conversely, the photodegradation test showed that HD/MOF/MoS 5 % and HD/MOF/MoS 7.5 % had an efficiency of 89 % and HD of 80 %. Therefore, our results demonstrate that the developed aerogels are promising candidates for the adsorption and photodegradation of dye while being low-cost, environmentally friendly, and easy to manufacture.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204525","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

Achieving ultrahigh electrochromic stability of triarylamine-based polymers by the design of five electroactive nitrogen centers 通过设计五个电活性氮中心实现三芳基胺聚合物的超高电致变色稳定性

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-16 DOI: 10.1016/j.mtchem.2024.102236

Yaw-Terng Chern, Yu-Quan Lin, Jia-Rong Han, Yu-Cheng Chiu

{"title":"Achieving ultrahigh electrochromic stability of triarylamine-based polymers by the design of five electroactive nitrogen centers","authors":"Yaw-Terng Chern, Yu-Quan Lin, Jia-Rong Han, Yu-Cheng Chiu","doi":"10.1016/j.mtchem.2024.102236","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102236","url":null,"abstract":"A shortage of long-term stability of electrochromic materials has been hindering their practical application. A series of novel polyamides (PAs) (4) with five electroactive nitrogen atoms within triphenylamine (TPA)-containing structures was synthesized via phosphorylation polyamidation. Polyamide 4 exhibited highly integrated electrochromic performances, including multiple color changes, high contrast of optical transmittance change, and the highest electrochromic stability (only 11.2 and 9.6 % decay of its coloration efficiency (CE) at 450 nm after 50000 and 16000 switching cycles, respectively) compared to all other triarylamine-based polymers to date. This record-high electrochromic cycling is attributed to the enhanced stability of polaron, which was studied through the electron-donating or electron-withdrawing effect of substituents and the resonance effect of electron delocalization over the electroactive nitrogen centers. Importantly, our core design of five electroactive nitrogen centers with electron-donating methoxy groups is the key factor to increase stability of polaron in the resulting polymers 4. More electroactive nitrogen centers are able to create a weaker electronic coupling due to a charge of cation radical dispersed by resonance successfully in-between the different redox states, which is evidenced clearly by the observed longer wavelength absorption in the NIR region. Our research confirms that the key to determining polaron stability is the resonance by the electrons delocalized over all the redox centers, rather than the electronic coupling between the different redox centers. And the resonance leads to increasing electrochromic stability of the polymer.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204527","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

Effect of electron redistribution on H adsorption and hydrogen production efficiency 电子再分布对氢吸附和制氢效率的影响

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-14 DOI: 10.1016/j.mtchem.2024.102244

Wansheng Ruan, Yiran Teng, Hanming Zhang, Zhihui Li, Tongguang Xu, Yalin Yang, Fei Teng

{"title":"Effect of electron redistribution on H adsorption and hydrogen production efficiency","authors":"Wansheng Ruan, Yiran Teng, Hanming Zhang, Zhihui Li, Tongguang Xu, Yalin Yang, Fei Teng","doi":"10.1016/j.mtchem.2024.102244","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102244","url":null,"abstract":"Water electrolysis is a promising, carbonless technology for hydrogen production, however, its widely industrial application is severely limited by the extensive energy consumption caused by sluggish oxygen evolution reaction (OER) kinetics. Herein, the simple Mn doping is employed to finely tune sulfur vacancies (V). The thoeretic calculations prove that the electron structure has been well controlled. Compared with perfect MoS (without V), the electron re-distribution of Mn-doped MoS with V (Vs-Mn-MoS) exhibits the both modes: electron depletion near the V and electron accumulation between two Mo atoms. Furthermore, the well-controlled electron structure obviously promotes H adsorption. The experimental results shows that the 5 wt% Mn–MoS exhibits an excellent hydrogen evolution reaction (HER) activity (79 mV/10 mA cm, 55.46 mV dec), which is better than the other MoS-based electrolysts in the previous reports. Moreover, an innovative substitution anode reaction is designed, namely, glycerol oxidation reaction (GOR)-based symmetric electrolyser with Mn–MoS as the both electrodes. At 60 mA cm, the cell voltage of GOR-based electrolyser has decreased by 14.8 %, and its Faradaic efficiency for HER increases by 10.04 % compared to conventional water-based one. This result proves that about 14.8 % of electric energy can be economized. Thus, this innovative electrocatalysis system could be promising for industrial hydrogen production.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204529","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

Pyrazine-based supramolecular photosensitizing assemblies as type I photosensitizers for high-efficiency photooxidation reactions 基于吡嗪的超分子光敏组合物作为 I 型光敏剂用于高效光氧化反应

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-14 DOI: 10.1016/j.mtchem.2024.102249

Xiao-Han Shi, Rui-Zhi Dong, Kai-Kai Niu, Hui Liu, Shengsheng Yu, Ling-Bao Xing

{"title":"Pyrazine-based supramolecular photosensitizing assemblies as type I photosensitizers for high-efficiency photooxidation reactions","authors":"Xiao-Han Shi, Rui-Zhi Dong, Kai-Kai Niu, Hui Liu, Shengsheng Yu, Ling-Bao Xing","doi":"10.1016/j.mtchem.2024.102249","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102249","url":null,"abstract":"Donor-acceptor thermally activated delayed fluorescent (TADF) materials have been widely used in photocatalytic reactions as organic photosensitizers. However, the construction of TADF photosensitizers via a supramolecular self-assembly approach with the regulation of reactive oxygen species (ROS) is still a big challenge. In this study, a TADF molecule 4,4'-(6-(pyridin-4-yl)quinoxaline-2,3-diyl)bis(,-diphenylaniline) (TPA-PQ) by incorporating triphenylamine (TPA) act as donor and 6-(pyridin-4-yl)quinoxaline (PQ) act as an acceptor was designed and synthesized, which exhibited excellent TADF property and strong intramolecular charge transfer. Meanwhile, the TPA-PQ can not only self-assemble to form nanofiber structure in mixed solvent of HO and THF, but also can be used as a type I photosensitizer to selectively produce superoxide anion radicals (O). More interestingly, the ROS generated from TPA-PQ can be used as photocatalysts for the oxidative hydroxylation of arylboronic acids and aerobic cross dehydrogenation coupling (CDC) reactions with high yields of 92 % and 88 %, respectively. This study presents an innovative and eco-friendly approach to utilize TADF supramolecular structures for the purpose of conducting photocatalyzed organic reactions.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204528","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

Direct arylation-derived non-ionic star-shaped oligomeric CIL materials with Dramatically reduced work functions for organic solar cells 直接芳基化衍生的非离子星形低聚物 CIL 材料可大幅降低有机太阳能电池的功函数

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-14 DOI: 10.1016/j.mtchem.2024.102247

Peng Liu, Yu Wu, Murugan Pachaiyappan, Run Zhou, Ling-Jun Yang, Zhi-Yong Qiu, Yu-Long Peng, Zai-Fang Li, Shi-Yong Liu

{"title":"Direct arylation-derived non-ionic star-shaped oligomeric CIL materials with Dramatically reduced work functions for organic solar cells","authors":"Peng Liu, Yu Wu, Murugan Pachaiyappan, Run Zhou, Ling-Jun Yang, Zhi-Yong Qiu, Yu-Long Peng, Zai-Fang Li, Shi-Yong Liu","doi":"10.1016/j.mtchem.2024.102247","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102247","url":null,"abstract":"Although numerous photoactive layer materials have been explored for organic solar cells (OSCs), the cathode interface layer (CIL) materials still largely lag behind, however. Till now, ionic perylene diimide (PDI) derivatives are one of the most representative conjugated small molecules CIL materials for OSC. In this study, three new non-ionic star-shaped oligomeric CIL materials named , and involving 1,3,5-tribromo-2,4,6-trifluoro-benzene building, cyclopentadithiophene, rhodamine and 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile blocks were designed and facilely synthesized atom-economic direct C–H arylation for OSC. In the follow-up study of structure-property correlation, it was found that all three molecules possess the deepened work function (WF). show good electron transport, and are introduced into the PM6:Y6 system to further explore its effect as CIL that, can effectively suppress charge recombination. Among them, has the best effect of reducing the WF, which reduces the WF of the Ag electrode from 4.30 eV to 3.41 eV. Owing to its deepest WF and best alcoholic processability. The -based devices achieve a highest-power conversion efficiency (PCE) of 14.53 %, corresponding to a of 0.85 V, a of 25.17 mA cm, and an FF of 67.21 %. Our work opens up a new direction for non-ionic, non-PDI and non-fused ring star-shaped CIL materials, and thus diversify the CIL materials.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204526","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

An AIE-active Schiff base derivative with reversible thermochromism based on two-step isomerization in the solid state 基于固态两步异构化的具有可逆热变色作用的 AIE 活性希夫碱衍生物

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-10 DOI: 10.1016/j.mtchem.2024.102241

Yang Liu, Xulin Liu, Yongqi Tian, Run Ran, Chuang Du, Yawen Wang, Nana Ma, Ruinan Li, Xin Chai, Xueling Dong, Haikui Zou

{"title":"An AIE-active Schiff base derivative with reversible thermochromism based on two-step isomerization in the solid state","authors":"Yang Liu, Xulin Liu, Yongqi Tian, Run Ran, Chuang Du, Yawen Wang, Nana Ma, Ruinan Li, Xin Chai, Xueling Dong, Haikui Zou","doi":"10.1016/j.mtchem.2024.102241","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102241","url":null,"abstract":"Thermoresponsive aggregation-induced emission (AIE) luminogens, especially in the solid state, have attracted extensive attention due to their potential applications as smart materials. Herein, we report an AIE-active tetraphenylethene (TPE)-based Schiff base derivative (TPENOMe-I) that exhibits rapid and reversible thermochromism along with luminescence in the solid state. The excited-state intramolecular proton transfer-induced AIE and efficient thermochromism (rather than photochromism) are facilitated by the relatively compact crystal packing and polymorphism of TPENOMe-I, which effectively suppress -to- isomerization. Theoretical calculations demonstrated that the two-step isomerization process between the enol isomer and the - and twisted -keto isomers is responsible for the thermochromic behavior of solid-state TPENOMe-I. The chromic transitions may result from the reversible interconversion between various twisted -keto forms during the thermal isomerization process. Three composites containing TPENOMe-I that were simply prepared with low cost excited reversible thermochromism and were successfully demonstrated in thermochromic patterns. The findings suggest that these TPENOMe-I composites have promising applications for use in warning labels, thermochromic textiles, and thermal printing.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204530","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

Nitrogen doping in carbon xerogels via ammonia pyrolysis: A case study 通过氨热解在碳 xerogels 中掺氮：案例研究

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-10 DOI: 10.1016/j.mtchem.2024.102238

Priyanka Sharma, Abdurrahman Bilican, Wolfgang Schmidt, Cristina Ochoa-Hernández, Martin Etter, Claudia Weidenthaler

引用次数: 0

Towards efficient blue aggregation-induced emission and delayed fluorescence molecules by locking the skeleton of indolocarbazole derivatives for non-doped OLEDs 通过锁定用于非掺杂有机发光二极管的吲哚咔唑衍生物骨架，实现高效的蓝色聚集诱导发射和延迟荧光分子

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-07 DOI: 10.1016/j.mtchem.2024.102239

J. Wang, Y. Niu, Y. Yang, H. Peng, J. Zhang, C. Yao

{"title":"Towards efficient blue aggregation-induced emission and delayed fluorescence molecules by locking the skeleton of indolocarbazole derivatives for non-doped OLEDs","authors":"J. Wang, Y. Niu, Y. Yang, H. Peng, J. Zhang, C. Yao","doi":"10.1016/j.mtchem.2024.102239","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102239","url":null,"abstract":"Although the design strategies for thermally activated delayed fluorescence (TADF) molecules have gradually become richer and more refined, challenges still exist in the design of such materials. Typically, the highly twisted donor (D)-acceptor (A)-type structure of TADF materials presents a challenging contradiction between the desire for a minimal singlet-triplet energy gap (Δ) and the pursuit of high oscillator strength/photoluminescence quantum yield (). This study proposes an effective TADF molecular design strategy, which involves selecting a highly rigidity and planarity indolocarbazole (ICz) donor and a molecularly locked acceptor to construct molecules with a D-A-D configuration, successfully creating successfully creating emitters with high and a small Δ. These molecules exhibit strong TADF and aggregation-induced emission (AIE) characteristics in nondoped films, with exceeding 70.0 % and small Δ, small nonradiative transition rate constant, and larger reverse intersystem crossing constant (). Acting as excellent emitters in OLEDs, they provide efficient electroluminescence with CIE=(0.148, 0.119) for 23bCzSOB and CIE=(0.219, 0.463) for 23bCzTPO, with the highest current efficiency (CE) and external quantum efficiency (EQE) reaching 29.5 cd/A and 14.9 % for 23bCzSOB and 36.9 cd/A and 21.6 % for 23bCzTPO, respectively. These results indicate that the molecular design of efficient delayed fluorescence molecules is successful and promising.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939650","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

In-situ investigation of damage evolution and mechanism in composite propellants under monochromatic X-ray irradiation 单色 X 射线辐照下复合推进剂损伤演变和机理的原位研究

IF 7.3 2区化学

Materials Today Chemistry Pub Date : 2024-08-05 DOI: 10.1016/j.mtchem.2024.102237

Tianhao Wang, Xiuyan Zhang, Haolin Luo, Chengli Mao, Jiaxing Wang, Weichen Sheng, Kuai He, Zhi Jiang

{"title":"In-situ investigation of damage evolution and mechanism in composite propellants under monochromatic X-ray irradiation","authors":"Tianhao Wang, Xiuyan Zhang, Haolin Luo, Chengli Mao, Jiaxing Wang, Weichen Sheng, Kuai He, Zhi Jiang","doi":"10.1016/j.mtchem.2024.102237","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102237","url":null,"abstract":"Synchrotron radiation monochromatic X-ray computed tomography (CT) is a powerful tool for in-situ characterization of the internal microstructure evolution in composite materials. However, prolonged X-ray irradiation during long-term in-situ studies may affect the structure and properties of material. While the effects of white beam irradiation have been widely investigated, the specific damage mechanisms and material sensitivity to monochromatic X-ray irradiation, particularly in composite materials like propellants, are not well understood. In this study, we identify the threshold irradiation time that triggers radiation damage in PBT propellant and observe the accumulation and worsening of damage over time, primarilyinitiated by ether bond cleavage, leading to radiation-induced decomposition and increased internal porosity. This resulted in a significant reduction in the mechanical strength of PBT propellant, particularly under prolonged exposure to synchrotron radiation. In contrast, the inert binder system HTPB propellant exhibited better radiation stability. Our study highlights the importance of considering both radiation-induced damage and material X-ray sensitivity when designing in-situ synchrotron radiation CT experiments for composite materials, and suggests that the development of dynamic experimental methods to further reduce the risk of radiation damage for high-reliability in-situ assessment of material properties, as well as the need for careful consideration of radiation effects in the design and safety evaluation of solid propellant systems working in extreme circumstance.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":null,"pages":null},"PeriodicalIF":7.3,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939651","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