ACS Omega最新文献

{"title":"Structural Changes of Water in Carboxymethyl Cellulose Nanofiber Hydrogels during Vapor Swelling and Drying","authors":"Yuta Takahara,&nbsp;Yusuke Beni,&nbsp;Yurina Sekine,&nbsp;Takuya Nankawa and Tomoko Ikeda-Fukazawa*,&nbsp;","doi":"10.1021/acsomega.4c0783110.1021/acsomega.4c07831","DOIUrl":"https://doi.org/10.1021/acsomega.4c07831https://doi.org/10.1021/acsomega.4c07831","url":null,"abstract":"<p >Carboxymethyl cellulose nanofiber (CMCF) forms mechanically strong hydrogels via freeze cross-linking. We investigated the vapor swelling and drying processes of the freeze cross-linked CMCF hydrogels using infrared spectroscopy and X-ray diffraction. From the shifts of the O–H and C═O stretching modes, the structural changes of water and carboxymethyl celluloses (CMC) were analyzed. The results show that two types of bound water exist in CMCF hydrogels due to a difference in hydrophilicity between the amorphous and crystalline regions of CMCF. Bound water adsorbed on the amorphous region forms a strong hydrogen bond with dangling O–H or C═O bonds of CMC, whereas that adsorbed on the crystalline region has a weak hydrogen bond with the localized hydrophilic groups on the hydrophobic surface. Due to the difference in the hydrogen bonding strength of the two types of bound water, the vapor swelling process of water in CMCF hydrogels is classified into four stages. For the drying process, the residual water, which formed a strong hydrogen bond with the hydrophilic groups of the CMC, has effects on the CMCF structure. The present result suggests that the adsorption and desorption of water are important factors governing the physical and chemical properties of the CMCF hydrogels.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c07831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural Evolution Study of Titanium–Vanadium–Niobium Nanoparticles from Single to Multicomponent Systems","authors":"Yi-Rong Liu*,&nbsp;Yan Jiang and Lang Bai,&nbsp;","doi":"10.1021/acsomega.4c0777710.1021/acsomega.4c07777","DOIUrl":"https://doi.org/10.1021/acsomega.4c07777https://doi.org/10.1021/acsomega.4c07777","url":null,"abstract":"<p >In this article, the revised basin-hopping with mirror-rotation sampling combined with density functional theory, which was proposed by our previous study, was used to study the structural property of Ti_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), V_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), Nb_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), and Ti_<i>n</i>V_<i>n</i>Nb_<i>n</i> (<i>n</i> = 1–7) systems. We found that equiatomic Ti_<i>n</i>V_<i>n</i>Nb_<i>n</i> (<i>n</i> = 1–7) systems do not change their lowest energy structures relative to the same size Ti_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), V_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), and Nb_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7) systems, and this indicates that the nanoparticles composed of titanium, vanadium, or niobium elements may have similar energy morphologies when the atomic number is the same. Based on the low-energy structural similarity of titanium–vanadium–niobium systems between single and multicomponent, we used the element space position replacement (ESPR) method to reconstruct the low-energy structure of Ti_<i>n</i>V_<i>n</i>Nb_<i>n</i> (<i>n</i> = 1–7) systems. For the Ti₇V₇Nb₇ system, the average sampling step of 10 separate searches of the BH-MRS method is 1226 more than that of the ESPR method to find the lowest energy structure (six-ring layered structure). The electronic property calculation shows that using equiatomic vanadium and niobium elements to replace titanium element in the Ti_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7) system may not change its stability, and the Ti_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7) system has better electron trapping ability than V_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), Nb_<i>n</i> (<i>n</i> = 3<i>m</i>, <i>m</i> = 1–7), and Ti_<i>n</i>V_<i>n</i>Nb_<i>n</i> (<i>n</i> = 1–7) systems. Our method and results can be helpful for the design of nanostructures of transition metals with better catalytic properties.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c07777","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antimicrobial and Superhydrophobic CuONPs/TiO2 Hybrid Coating on Polypropylene Substrates against Biofilm Formation","authors":"Sudipto Pal*,&nbsp;Stefania Villani,&nbsp;Antonella Mansi,&nbsp;Anna Maria Marcelloni,&nbsp;Alessandra Chiominto,&nbsp;Ilaria Amori,&nbsp;Anna Rita Proietto,&nbsp;Matteo Calcagnile,&nbsp;Pietro Alifano,&nbsp;Sonia Bagheri,&nbsp;Claudio Mele,&nbsp;Antonio Licciulli,&nbsp;Alessandro Sannino and Christian Demitri*,&nbsp;","doi":"10.1021/acsomega.4c0734510.1021/acsomega.4c07345","DOIUrl":"https://doi.org/10.1021/acsomega.4c07345https://doi.org/10.1021/acsomega.4c07345","url":null,"abstract":"<p >Biofilm formation in common public places and hospitals is of great concern. Active antimicrobial coatings can prevent the formation of bacterial biofilms and the spreading of primary and secondary infections caused by contagious bacteria and viruses. In the present work, we report a simple spray coating process using copper oxide (CuO) nanoparticles (NPs) dispersed in a titanium dioxide (TiO₂) sol, where CuONPs act as the active antimicrobial agent and TiO₂ as the inorganic binder. Homogeneous CuONPs/TiO₂ coating was obtained on polypropylene substrates by spraying the CuO/TiO₂ sol using a commercial air gun, followed by drying at 80 °C. The amount of CuONPs loading in the coating was adjusted by controlling the number of coated layers. CuONPs and CuONPs/TiO₂ coatings were characterized by XRD, BET, X-ray fluorescence spectroscopy, AFM, and field emission scanning electron microscopy techniques. All of the coated films showed dual activity, i.e., antimicrobial and superhydrophobicity. A high bactericidal effect against both <i>Escherichia coli</i> and <i>Staphylococcus aureus</i> was observed for the coated substrates. Coatings with higher CuONPs showed greater antibacterial activity, reaching <i>R</i> value &gt;6, and no bacterial colonies were detected after 24 h of incubation. An increasing trend of water contact angle was observed with the increasing amount of CuONP loading.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c07345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the Anticorrosive Activity of Piper divaricatum Essential Oil on Steel in 1 M HCl","authors":"Heloise Leal Monteiro,&nbsp;Alcy Favacho Ribeiro,&nbsp;Mewry Joyce Correia Modesto,&nbsp;Eloisa Helena de Aguiar Andrade,&nbsp;José Antonio da Silva Souza,&nbsp;Jordan Del Nero,&nbsp;Arthur de Farias Silva Rente,&nbsp;Rodrigo Della Noce,&nbsp;José Pio Iúdice de Souza,&nbsp;Carlos Alberto Brito da Silva Jr*,&nbsp;Marcos Vinícius da Silva Paula and Ana Aurea Barreto Maia,&nbsp;","doi":"10.1021/acsomega.4c0726910.1021/acsomega.4c07269","DOIUrl":"https://doi.org/10.1021/acsomega.4c07269https://doi.org/10.1021/acsomega.4c07269","url":null,"abstract":"<p ><i>Piper divaricatum</i> essential oil (PDEO), extracted from plants of the Brazilian Amazon, was investigated for the first time as a novel green or eco-friendly inhibitor for steel corrosion in 1 M HCl at 25 °C. Our electrochemical studies demonstrate that for different PDEO concentrations, lower <i>E</i>_corr and <i>i</i>_corr values were obtained. The influence of the oil concentration on corrosion inhibition, 0.5–4 g/L, was determined for 1 and 7 days of immersion. The corrosion rate (CR) and inhibition efficiency (IE) were determined by mass loss. The steel surface in the presence and absence of oil was investigated by scanning electron microscopy (SEM). The main PDEO compounds, determined by gas chromatography–mass spectrometry (GC-MS), were methyleugenol (20.68%) and eugenol (15.42%). The CR and IE for 2 g/L PDEO exhibited an optimal value of 4.31 mm/year and 98.3% for 7 days of immersion, respectively. The surface with 2 g/L oil for 7 days exhibited a less rough morphology, which was attributed to the corrosion inhibitory effect of PDEO. In addition, the PDEO adsorption process on the steel surface obeyed the Langmuir isotherm model. Negative values found for free standard energy (<i></i><math><mi>Δ</mi><msubsup><mi>G</mi><mrow><mi>ads</mi></mrow><mo>°</mo></msubsup></math> &lt; 0 kJ·mol^–1) were attributed as a favorable process, i.e., an indicative of physisorption and chemisorption between the PDEO components and the steel surface. Our results reveal that the PDEO has a promising character for anticorrosive steel applications and metal coating in industries.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c07269","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and Comprehensive Characterization of Amino Acid-Derived Vinyl Monomer Gels","authors":"Claire Beddok,&nbsp;Alicia Zimmer,&nbsp;Carole Calas Blanchard* and Gad Fuks*,&nbsp;","doi":"10.1021/acsomega.4c0524610.1021/acsomega.4c05246","DOIUrl":"https://doi.org/10.1021/acsomega.4c05246https://doi.org/10.1021/acsomega.4c05246","url":null,"abstract":"<p >In this study, we report an easy synthetic pathway to vinyl monomers derivatized with amino acids. Tyrosine-, phenylalanine-, tryptophan-, leucine-, and methionine-based monomers were synthesized, and their polymerization in the presence of cross-linking agents led to the formation of amino acid-based gels. The nature of cross-linker, the time of polymerization, and the type of initiation (photopolymerization or thermopolymerization) were investigated. The obtained gels were characterized using a combination of thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), rheology, scanning electron microscopy (SEM), and solid-state nuclear magnetic resonance (NMR) spectroscopy. These novel amino acid-based gels could find applications in various areas such as drug delivery, biosensing, and biotechnology.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c05246","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between Xylene Solubles and Crystallization Elution Fractionation of Polypropylene","authors":"Mengxue Shi*,&nbsp;Mei Hong,&nbsp;Lin Liu and Rongjuan Cong*,&nbsp;","doi":"10.1021/acsomega.4c0686310.1021/acsomega.4c06863","DOIUrl":"https://doi.org/10.1021/acsomega.4c06863https://doi.org/10.1021/acsomega.4c06863","url":null,"abstract":"<p >The Xylene Soluble (XS) is one of the most important parameters closely related to the performance of polypropylene (PP) materials. In order to obtain precise and accurate XS data, ASTM D 5492-17, based on the wet chemistry separation mechanism, strictly specifies each and every step of the procedure, such as a glassware setup, heating and cooling rates, etc. Meanwhile, crystallization elution fractionation (CEF), a newly developed technique, is capable of quantifying polyolefin structural regularity and comonomer distribution in a fast and automated manner. There have been a few pieces of preliminary work aiming to provide XS value from the CEF test with a limited number of samples. It is important to gain deep insights into the relationship between XS and the purge fraction of CEF by studying a large number of diverse polypropylene materials. In this paper, close to 300 commercial polypropylene and/or homemade polypropylene, both homopolypropylene (hPP) and propylene–ethylene copolymers (P/E) made with various catalysts under different conditions, were employed. XS values were obtained via CRYSTEX QC calibration. It was found that XS and the soluble fraction (SF) from CEF yielded a linear relationship with <i>R</i>² = 0.9942. This linearity is applicable regardless of polymer types, which can differ significantly in terms of molecular weight distribution, tacticity, chemical composition, and melt flow rate. One of the prominent advantages of using the CEF test instead of ASTM D 5492-17 is the elimination of the time-consuming procedure for much-improved precision and high productivity. In addition, the catalytic system was found to have an influence on SF and crystalline fractions of copolymers.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c06863","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding Cation–Anion Ionic Bonding in Tetramethylammonium Salts: Insights from Density Functional Theory and X-ray Crystallography","authors":"W. Christopher Hollinsed*,&nbsp; and ,&nbsp;Abigail Taber,&nbsp;","doi":"10.1021/acsomega.4c0726510.1021/acsomega.4c07265","DOIUrl":"https://doi.org/10.1021/acsomega.4c07265https://doi.org/10.1021/acsomega.4c07265","url":null,"abstract":"<p >In describing the charge on tetraalkylammonium ions, a charge of +1 is usually assigned. This is both the actual charge as well as the “formal charge” which is usually written on the nitrogen atom to indicate the electron deficiency experienced by the nitrogen atom relative to the valence electrons. Nitrogen is the most electronegative atom in the ion. The results in this study show that despite the convention of writing the positive charge on nitrogen, the ion is polarized through the σ bond framework to present four tetrahedral faces, each having close to a full charge of +1 to any anionic species which approach the cation.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c07265","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Surgical Care: Development of Biocompatible, Superabsorbent Alternatives to Cotton Gauze Using Chia Mucilage and Poly(vinylpyrrolidone)","authors":"Kainan Akio Weege,&nbsp;Antônio Augusto Ulson de Souza,&nbsp;Andrea Cristiane Krause Bierhalz,&nbsp;Paulo Feuser and Ana Paula Serafini Immich*,&nbsp;","doi":"10.1021/acsomega.4c0807310.1021/acsomega.4c08073","DOIUrl":"https://doi.org/10.1021/acsomega.4c08073https://doi.org/10.1021/acsomega.4c08073","url":null,"abstract":"<p >Cotton gauze bandages have traditionally played a pivotal role in wound care and surgical procedures, absorbing fluids, including blood, and protecting against infection. However, their limited liquid absorption capacity raises concern about potential post-surgery complications if inadvertently retained. In response, resorbable and biocompatible polymers have emerged as a promising alternative to enhance surgical outcomes and mitigate inflammation. This study aims to develop a biocompatible, highly absorbent, and preferably resorbable substitute for cotton gauze, utilizing natural polysaccharides from chia seeds’ mucilage alongside the synthetic polymer poly(vinylpyrrolidone) (PVP). Incorporating tranexamic acid, an antifibrinolytic agent, into the PVP solution enhances its efficacy in controlling blood flow. The polymer solution is then processed into nonwoven materials via solution blow spinning. UV–C radiation cross-linking is employed to bolster the nonwovens’ performance and durability during liquid absorption and swelling. Results demonstrate that nonwoven samples comprising PVP and chia mucilage, cross-linked for 60 min with UV–C radiation, exhibit exceptional swelling capacity, absorbing approximately 3291% of their dry weight in saline solution. Microfiber analysis indicates alterations in fiber characteristics due to cross-linking duration. Cell viability tests affirm the biocompatibility of the produced materials. With their remarkable fluid absorption properties and potential for resorption, PVP/chia mucilage compositions supplemented with tranexamic acid offer a promising avenue for effectively managing surgical bleeding without adverse effects. Furthermore, these materials can safely remain within the surgical site, eventually undergoing natural resorption by the body owing to their resorbable nature.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c08073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142608686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating Antimalarial Proteasome Inhibitors for Efficacy in Babesia Blood Stage Cultures","authors":"Luïse Robbertse,&nbsp;Pavla Fajtová,&nbsp;Pavla Šnebergerová,&nbsp;Marie Jalovecká,&nbsp;Viktoriya Levytska,&nbsp;Elany Barbosa da Silva,&nbsp;Vandna Sharma,&nbsp;Petr Pachl,&nbsp;Jehad Almaliti,&nbsp;Momen Al-Hindy,&nbsp;William H. Gerwick,&nbsp;Evžen Bouřa,&nbsp;Anthony J. O’Donoghue* and Daniel Sojka*,&nbsp;","doi":"10.1021/acsomega.4c0456410.1021/acsomega.4c04564","DOIUrl":"https://doi.org/10.1021/acsomega.4c04564https://doi.org/10.1021/acsomega.4c04564","url":null,"abstract":"<p >Tick-transmitted <i>Babesia</i> are a major global veterinary threat and an emerging risk to humans. Unlike their <i>Plasmodium</i> relatives, these erythrocyte-infecting Apicomplexa have been largely overlooked and lack specific treatment. Selective targeting of the <i>Babesia</i> proteasome holds promise for drug development. In this study, we screened a library of peptide epoxyketone inhibitors derived from the marine natural product carmaphycin B for their activity against <i>Babesia</i>. Several of these compounds showed activity against both the asexual and sexual blood stages of <i>Plasmodium falciparum</i>. These compounds inactivate β5 proteasome subunit activity in the lysates of <i>Babesia divergens</i> and <i>Babesia microti</i> in the low nanomolar range. Several compounds were tested with the purified <i>B. divergens</i> proteasome and showed IC₅₀ values comparable to carfilzomib, an approved anticancer proteasome inhibitor. They also inhibited <i>B. divergens</i> growth in bovine erythrocyte cultures with solid EC₅₀ values, but importantly, they appeared less toxic to human cells than carfilzomib. These compounds therefore offer a wider therapeutic window and provide new insights into the development of small proteasome inhibitors as selective drugs for babesiosis.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c04564","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aluminum Dust Explosion Suppression Performance and Mechanism of a New Mesoporous Composite Explosion Suppressant","authors":"Xinyu Li,&nbsp;Haiyan Chen*,&nbsp;Yansong Zhang,&nbsp;Chunmiao Yuan,&nbsp;Hongzhao Wei,&nbsp;Wenxue Sun,&nbsp;Zhangjie Lu and Qingzhou Zhang,&nbsp;","doi":"10.1021/acsomega.4c0387110.1021/acsomega.4c03871","DOIUrl":"https://doi.org/10.1021/acsomega.4c03871https://doi.org/10.1021/acsomega.4c03871","url":null,"abstract":"<p >In this paper, using a 20 L spherical explosive device and a Hartmann device, we carried out explosion suppression experiments on 19 and 30 μm aluminum powders (500 g/m³) with different concentrations of the new explosive suppressants (MCM41@CS-APP) and CaCO₃ and elaborated on the suppression mechanism of the explosion of MCM41@CS-APP on aluminum powder. The experimental results show that when the concentration of the explosion suppressor is 50 g/m³, the maximum explosion pressure (<i>P</i>_max) produced by the explosion of mixed dust is higher than that of the explosion of aluminum powder, and with the increase of the concentration of the deflagration suppressant, the <i>P</i>_max of the mixed dust decreases. When the concentrations of MCM41@CS-APP and CaCO₃ reached 400 g/m³, the <i>P</i>_max of the mixed dust (Al = 19 μm) was 0.133 and 0.364 MPa, which decreased by 81.3% and 48.9%, respectively. The <i>P</i>_max of the mixed dust (Al = 30 μm) was not significant. Both detonation inhibitors inhibited the explosion of aluminum powder; the detonation duration of Al/MCM41@CS-APP is shorter; there are fewer aluminum particles in the product; and the initial oxidation temperature of aluminum powder is higher.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":null,"pages":null},"PeriodicalIF":3.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c03871","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142609107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}