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Design and evaluation of a kind of polymer-bonded explosives with improved mechanical sensitivity and thermal properties

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Defence Technology（防务技术） 2024年第10期40卷 13-24页

作者： Na Li Weizhe Wang Zhengzheng Zhang Shaohua Jin Lijie Li Changgen feng Jiaming Gao Yu chen school of Materials Science and engineering Beijing Institute of TechnologyBeijing 100081China Gansu Yinguang chemical Industry Group Co.Ltd Baiyin 730900China school of Mechatronical engineering Beijing Institute of TechnologyBeijing 100081China

The emergence of TKX-50,an energetic ionic salt with a high enthalpy of formation and low sensitivity,has opened a new path for the development of high-energetic,insensitive composite ***,due to the poor interfacial binding properties of TKX-50 with conventional binders,there is a lack of effective guidance for the design of TKX-50 based composite *** address the above issues,the interactions between carboxymethyl cellulose acetate butyrate(CMCAB)and other binders with explosives TKX-50/HMX were compared using the molecular dynamics *** on the simulations,TKX-50/HMX/CMCAB-based polymer-bonded explosives(PBXs)were prepared with CMCAB as binder,which displays a high binding energy(Ebind)with TKX-50 and high cohesive energy density(CED),and the effect of TKX-50 content on the performance of PBXs was *** physical properties of PBXs,specifically the morphology,mechanical sensitivity,and thermal conductivity,were analyzed by SEM,sensitivity apparatus,and thermal conductivity meter,*** specific heat capacity(Cp)and non-isothermal decomposition temperature of PBXs were tested by DSC,and then the corresponding thermal kinetic parameters were analyzed to evaluate their thermal *** adiabatic thermal decomposition processes of PBXs were tested using an ARC *** decomposition mechanism and kinetics were also explored to further analyze their thermal stability and thermal safety under adiabatic *** computer code EXPLO5 was used to predict the detonation parameters of *** results showed that CMCAB and TKX-50 displayed favorable interfacial bonding properties,and TKX-50 can be bonded with HMX to form a molding powder with a desirable morphology and safety *** TKX-50 in PBXs effectively improves the mechanical sensitivity and thermal safety of PBX and has a significant effect on the detonation performance of *** research demonstrates a novel method suitable for screening and inv

关键词： CMCAB TKX-50 HMX Interaction Safety

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Microenvironment responsive pod-structured astaxanthin nanocarrier for ameliorating inflammatory bowel disease

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Chinese chemical Letters 2024年第7期35卷 360-366页

作者： Jingting Wang Yuanyuan chen Linlin Han Shasha Xia Xingyao Zhang Peng Xue Yuejun Kang jian Ming Zhigang Xu Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationSchool of Materials and Energy&Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and DevicesSouthwest UniversityChongqing 400715China College of Food Science Southwest UniversityChongqing 400715China State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082China

Anti-inflammatory drugs targeting inflammatory bowel disease(IBD)have attracted considerable attention but still face low therapeutic outcomes and frequent side ***(ATX),a natural ketone,possesses potent antioxidant and anti-inflammatory ***,it faces problems such as poor water solubility,photothermal instability,and low ***,we employed a supramolecular encapsulation strategy to create a nanoscale oral delivery system for ATX(referred to as FC-ATX NPs)by coupling fucoidan(FUC)with chitosan oligosaccharides(COS).The obtained FC-ATX NPs exhibited a particular“bean pod”structure with uniform size,good encapsulation efficiency,excellent physical and chemical stability,pH-triggered intestinal targeted slow-release properties,and potent antioxidant *** vitro cell culture experiments showed that FC-ATX NPs promoted cellular uptake and scavenged excessive intracellular reactive oxygen species(ROS).In mouse models of colitis,FC-ATX NPs enhanced the drug absorption of intestinal epithelial cells and effectively accumulated at the site of *** work provides an efficient approach to enhance the bioavailability of ATX and has excellent application potential as an oral targeted delivery system for colitis therapy.

关键词： Oral administration Astaxanthin Nanocarrier Anti-oxidant activity Colon targeting

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Scalable production of mesoporous titanium nanoparticles through sequential flash nanocomplexation

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Chinese chemical Letters 2024年第4期35卷 303-309页

作者： feng Cui Fangman chen Xiaochun Xie chenyang Guo Kai Xiao Ziping Wu Yinglu chen Junna Lu Feixia Ruanb Chuanxu cheng Chao Yang Dan Shao school of Biomedical Sciences and engineering South China University of TechnologyGuangzhou International CampusGuangzhou 511442China Institutes for Life Sciences School of MedicineSouth China University of TechnologyGuangzhou 510006China school of Biology and Biological engineering South China University of TechnologyGuangzhou 510006China Department of Orthopedics Academy of Orthopedics-Guangdong ProvinceOrthopedic Hospital of Guangdong ProvinceGuangdong Provincial Key Laboratory of Bone and Joint Degenerative DiseasesThe Third Affiliated Hospital of Southern Medical UniversityGuangzhou 510665China National engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou 510006China

Mesoporous titanium nanoparticles(MTNs) have emerged as an important porous semiconductor owning to their large surface area and unique electronic/optical properties. However, the fundamental research for rational manufacturing MTNs in a highly scalable manner remains a challenge. In this study, we report a two-step flash nanocomplexation(FNC) approach to large-scalable generate MTNs through the sequential combination of two multi-inlet vortex mixers. By optimizing the concentrated titanium precursor,polyethylene glycol(PEG)-functionalized silane amount and p H, we have been able to produce MTNs with small particle size(31.5 nm), larger surface area(416.9 m^(2)/g) and pore volume(0.59 cm^(3)/g). Different from the traditional MTNs bulk, FNC-produced MTNs exhibited well-controlled manner and exceptional photocatalytic and antibacterial properties. Importantly, the optimized MTNs outperformed commercial P25 not only in protecting ultraviolet A(UVA)-exposed skin, but also in treating P. aeruginosa-infected wound. We believe that the high controllability and scalability of sequential flash nanocomplexation method offers great opportunities in enhancing the performance of mesoporous titanium nanoparticles.

关键词： Mesoporous titanium nanoparticles Flash nanocomplexation Photocatalytic Antibacterial Sequential

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Molecular-level proton acceptor boosts oxygen evolution catalysis to enable efficient industrial-scale water splitting

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Green Energy & Environment 2024年第2期9卷 344-355页

作者： Yaobin Wang Qian Lu Xinlei Ge feng Li Le chen Zhihui Zhang Zhengping Fu Yalin Lu Yang Song Yunfei Bu jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)UNIST-NUIST Energy and Environment Jointed Lab(UNNU)School of Environmental Science and TechnologyNanjing University of Information Science and Technology(NUIST)219 NingliuNanjing210044China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan University220 HandanShanghai200433China jiangsu Key Laboratory of Advanced Materials and Technology School of Petrochemical EngineeringChangzhou University1 GehuChangzhou213164China Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China(USTC)96 JinzhaiHefeiAnhui 230026China school of Chemistry and chemical engineering Nanjing University of Science and Technology200 Xiaolingwei210094China

Industrial water splitting has long been suppressed by the sluggish kinetics of the oxygen evolution reaction(OER),which requires a catalyst to be ***,we propose a molecular-level proton acceptor strategy to produce an efficient OER catalyst that can boost industrial-scale water ***-level phosphate(-PO_(4))group is introduced to modify the surface of PrBa_(0.5)Ca_(0.5)Co_(2)O_(5)+δ(PBCC).The achieved catalyst(PO_(4)-PBCC)exhibits significantly enhanced catalytic performance in alkaline *** on the X-ray absorption spectroscopy results and density functional theory(DFT)calculations,the PO_(4)on the surface,which is regarded as the Lewis base,is the key factor to overcome the kinetic limitation of the proton transfer process during the *** use of the catalyst in a membrane electrode assembly(MEA)is further evaluated for industrial-scale water splitting,and it only needs a low voltage of 1.66 V to achieve a large current density of 1 A cm^(-2).This work provides a new molecular-level strategy to develop highly efficient OER electrocatalysts for industrial applications.

关键词： Oxygen evolution reaction Nanofiber Water splitting Proton acceptor Perovskite

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A novel strategy for treating oncogene-mutated tumors by targeting tumor microenvironment and synergistically enhancing anti-PD-1 immunotherapy

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Cancer Communications 2024年第3期44卷 438-442页

作者： Yingqiang Liu Linjiang Tong Mengge Zhang Qi Zhang Qiupei Liu Fang feng Yan Li Mengzhen Lai Haotian Tang Yi chen Meiyu Geng Wenhu Duan jian Ding Hua Xie Division of Antitumor Pharmacology&State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiP.R.China University of Chinese Academy of Sciences BeijingP.R.China Department of chemical and Environmental engineering University of Nottingham Ningbo ChinaNingboZhejiangP.R.China Zhongshan Institute for Drug Discovery Shanghai Institute of Materia MedicaChinese Academy of SciencesZhongshanGuangdongP.R.China Shandong Laboratory of Yantai Drug Discovery Bohai Rim Advanced Research Institute for Drug DiscoveryYantaiShandongP.R.China Small-Molecule Drug Research Center Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiP.R.China

Oncogenes are critical factors in tumorigenesis of diverse cancer types and play essential roles in tumor immune *** in Kirsten rat sarcoma viral oncogene homolog(KRAS)and epidermal growth factor receptor(EGFR)are among the most frequent gain-of-function alterations[1].After many years of in-depth research,inhibitors targeting EGFR or KRAS mutations have been successfully developed,however,their clinical benefit is relatively limited,and they will inevitably encounter the challenge of drug *** emergence of resistance is attributed to secondary mutations in driver genes and other complicated factors.

关键词： alterations KRAS sarcoma

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Weavable thermoelectrics: advances, controversies, and future developments

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Materials Futures 2024年第1期3卷 63-94页

作者： Xiao-Lei Shi Shuai Sun Ting Wu jian Tu Zhiming Zhou Qingfeng Liu Zhi-Gang chen school of Chemistry and Physics ARC Research Hub in Zero-emission Power Generation for Carbon Neutralityand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueensland4000Australia State Key Laboratory of Materials-Oriented chemical engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211800People’s Republic of China school of Materials Science and engineering Chongqing University of TechnologyChongqing 400054People’s Republic of China

Owing to the capability of the conversion between thermal energy and electrical energy and their advantages of light weight,compactness,noise-free operation,and precision reliability,wearable thermoelectrics show great potential for diverse *** them,weavable thermoelectrics,a subclass with inherent flexibility,wearability,and operability,find utility in harnessing waste heat from irregular heat *** the rapid advancements in this field,a timely review is essential to consolidate the progress and ***,we provide an overview of the state of weavable thermoelectric materials and devices in wearable smart textiles,encompassing mechanisms,materials,fabrications,device structures,and applications from recent advancements,challenges,and *** review can serve as a valuable reference for researchers in the field of flexible wearable thermoelectric materials and devices and their applications.

关键词： thermoelectric weaving materials structure device

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MOF-assisted Synthesis of Dual-atom Palladium Catalysts for Acetylene Semi-hydrogenation

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China Petroleum Processing & Petrochemical Technology 2024年第3期26卷 42-52页

作者： chen Jie Xu Yuebing Qi jian Liu Bing Liu Xiaohao Department of chemical engineering School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China State Key Laboratory of Biochemical engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The selective removal of trace acetylene in ethylene feed gas is of great significance in the petrochemicalindustry;however, there are still challenges in designing and developing high-performance catalysts. Here, a MOFassistedencapsulation strategy was adopted for the precise synthesis of diatomic Pd2 sites on a ZnO support. When usedfor the acetylene semi-hydrogenation reaction, the dual-atom Pd2-ZnO catalyst exhibited improved catalytic performance,achieving complete conversion of acetylene at 125 °C with an 89% selectivity to ethene, as compared to Pd single-atom andnanoparticles. This enhancement was mainly attributed to the catalyst’s ability to dissociate H2 and facilitate the desorptionof intermediate C2H4. Moreover, the strong interaction between the support and the diatomic Pd sites was responsible for thecatalyst’s excellent stability during the long-term reaction.

关键词： dual-atom palladium acetylene semi-hydrogenation MOFs hydrogen dissociation intermediate

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A non-peptide-based chymotrypsin-targeted long-wavelength emission fluorescent probe with large Stokes shift and its application in bioimaging

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Chinese chemical Letters 2024年第10期35卷 430-436页

作者： Chuanfeng Fan jian Gao Yingkai Gao Xintong Yang Gaoning Li Xiaochun Wang Fei Li Jin Zhou Haifeng Yu Yi Huang Jin chen Yingying Shan Li chen Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEShandong Provincial Key Laboratory of Biochemical EngineeringQingdao Nucleic Acid Rapid Detection Engineering Research CenterCollege of Marine Science and Biological EngineeringQingdao University of Science and TechnologyQingdao266042China school of Chemistry and Life Science Anshan Normal UniversityLiaoning Key Laboratory of Development and Utilization for Natural Products Active MoleculesAnshan114007China Biomedical Analysis Center Army Medical UniversityChongqing 400038China school of Pharmacy Weifang Medical UniversityWeifang 261053China College of Chemistry Baicheng Normal UniversityBaicheng 137000China

As a hydrolase,chymotrypsin(CHT)is involved in many physiological activities,and its abnormal activity is closely related to diabetes,pancreatic fibrosis,chronic pancreatitis and pancreatic *** this work,an innovative long-wavelength emission fluorescent probe TCF-CHT was designed and synthesized for the high specificity detection of CHT,which utilized TCF-OH and a mimetic peptide substrate 4-bromobutyryl as chromogenic group and recognition group,***-CHT exhibited excellent selectivity and eye-catching sensitivity(8.91 ng/m L)towards CHT,“off-on”long-wavelength emission at 670 nm and large Stokes shift(140 nm).Furthermore,the successful fulfillment and perfect performance in imaging endogenous CHT in complex organisms(P815 cells,HepG2 cells,zebrafish and tumor-bearing mice)verified its potential as a powerful tool for the recognition of CHT in complicated biological environments.

关键词： Chymotrypsin Fluorescent probe Long-wavelength emission Large Stokes shift Bioimaging

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Metallic Sb-stabilized porous silicon with stable SEI and high electron/ion conductivity boosting lithium-ion storage performance

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Rare Metals 2024年第9期43卷 4234-4242页

作者： Jia-Guo Deng Hao-Qin feng Yu-Long Xu Si-Guang Guo jian-Ping Li Kai-Fu Huo Ji-jiang Fu Biao Gao Pual-K.Chu The State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081China Wuhan National Laboratory for Optoelectronics(WNLO) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China Department of Physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Silicon(Si)has mild discharge potential and high theoretical capacity,making it a highly desirable material for lithium-ion batteries(LIBs).Nevertheless,the excessive volume expansion,poor ion/electron conductiv ity and unstable solid electrolyte interface(SEI)hinde practical application to ***,the metallic antimony(Sb)stabilized porous Si(SiDSb)composite was prepared by magnesiothermic reduction of Sb_(2)O_(3)and Mg_(2)Si and chemical etching to remove the by-product of *** highly conductive Sb nanodots embedded in the Si liga ments promote not only the formation of conductive and stable LiF-rich SEI,but also the electron/ion transpor ability of *** to the outstanding bulk/interface stability,excellent conductivity,as well as ideal porous structure,the SiDSb electrode demonstrates a capacity of820 mAh·g^(-1)after undergoing 320 turns at 1000 mA·g^(-1).Additionally,it exhibits a stable capacity of 675 m Ah·g^(-1)when tested at a higher current density of 5000 m A·g^(-1).The results reveal a viable solution to solve three problems at the same time,namely the poor conductivity,inferior SEI and excessive volume expansion of Si,boding well for the design of Si-based materials for high-energy LIBs.

关键词： Silicon Anodes Lithium-ion batteries Antimony Solid electrolyte interphase

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Dynamic Sulfur-Rich Polymers from Elemental Sulfur and Epoxides

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Chinese Journal of Polymer Science 2024年第10期42卷 1479-1487,I0010页

作者： Ke-Xiang chen chen-Hui Cui Zhen Li Ting Xu Hao-Qing Teng Zhi-Yuan He Yin-Zhou Guo Xiao-Qing Ming Zhi-Shen Ge Yan-feng Zhang Tie-Jun Wang school of Chemistry Engineering Research Center of Energy Storage Materials and DevicesMinistry of EducationXi’an Jiaotong UniversityXi’an710049China State Key Lab for Strength and Vibration of Mechanical Structures Department of Engineering MechanicsXi’an Jiaotong UniversityXi’an710049China

Sulfur-containing dynamic polymers had attracted significant attention due to their unique chemical structures with high *** sulfur, an inexpensive industrial waste product, to synthesize dynamic polysulfide polymers through reverse vulcanization has been a notable approach. However, this method required high temperatures and resulted in the release of unpleasant oders. In this study, we presented a robust method for the preparation of sulfur-rich polymers with dynamic polysulfide bonds from elemental sulfur and inexpensive epoxide monomers via a one-pot strategy at the mild room temperature. Different types of polysulfide molecules and polymers were synthesized by reacting various epoxide compounds with sulfur, along with the investigation of their structures and dynamic behaviors. It was noteworthy that the obatined polymers prepared from m-(2,3-epoxypropoxy)-N,N-bis(2,3-epoxypropyl)aniline and elemental sulfur exhibit multiple dynamic behaviors, including polysulfide metathesis and polysulfide-thiol exchange, enabling their rapid stress relaxation, self-healing, reprocessing and degradable properties of the cross-linked polymer. More importantly, the hydroxyl groups at the side chains from epoxide ring opening exhibited potential transesterification. This work provided a facile strategy for designing dynamic sulfur-rich polymers via a mild synthesis route.

关键词： Elemental sulfur Sulfur-containing polymer Dynamic covalent bond Dynamic polymer

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