RSC Mechanochemistry最新文献

Moving mechanochemistry forward 推动机械化学向前发展

RSC Mechanochemistry Pub Date : 2025-01-07 DOI: 10.1039/D4MR90021A

James Batteas, Kerstin G. Blank, Evelina Colacino, Franziska Emmerling, Tomislav Friščić, James Mack, Jeffrey Moore, Maria Elena Rivas and Wilfred Tysoe

引用次数: 0

Influence of ball milling parameters on the mechano-chemical conversion of polyolefins. 球磨参数对聚烯烃机械-化学转化的影响。

RSC Mechanochemistry Pub Date : 2024-12-18 DOI: 10.1039/d4mr00098f

Adrian H Hergesell, Claire L Seitzinger, Justin Burg, Renate J Baarslag, Ina Vollmer

{"title":"Influence of ball milling parameters on the mechano-chemical conversion of polyolefins.","authors":"Adrian H Hergesell, Claire L Seitzinger, Justin Burg, Renate J Baarslag, Ina Vollmer","doi":"10.1039/d4mr00098f","DOIUrl":"https://doi.org/10.1039/d4mr00098f","url":null,"abstract":"Ball-milling of addition polymers such as polyolefins, polystyrene and polyacrylates can be used for depolymerization to obtain the respective monomers. However, absolute yields are typically low, especially from polyolefins which are notoriously difficult to depolymerize. To increase the viability of ball milling as a recycling technique, the effect of milling parameters on small hydrocarbon and monomer yields has to be understood. Herein, we systematically investigate the influence of sphere material, milling frequency, plastic filling degree, and milling temperature. Heavy spheres and high milling frequencies boost hydrocarbon yields by maximizing mechanical forces and frequency of collisions. While the dose of kinetic energy is commonly used to describe mechano-chemical processes, we found that it does not capture the mechano-chemical depolymerization of polyolefins. Instead, we rationalized the results based on the Zhurkov equation, a model developed for the thermo-mechanical scission of polymers under stress. In addition, low plastic filling degrees allow for high percentage yields, but cause significant wear on the grinding tools, prohibiting sustained milling. Milling below 40 °C is beneficial for brittle chain cleavage and depolymerization. This study provides a new approach to rationalize the influence of individual milling parameters and their interplay and serves as a starting point to derive design principles for larger-scale mechano-chemical depolymerization processes.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11696860/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142934306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanochemical synthesis of rock salt-type Na2CaSnS4 as a sodium-ion conductor† 岩盐型钠离子导体Na2CaSnS4的机械化学合成

RSC Mechanochemistry Pub Date : 2024-12-03 DOI: 10.1039/D4MR00028E

Hamdi Ben Yahia, Atsushi Sakuda and Akitoshi Hayashi

引用次数: 0

Mechanochemical synthesis and transformation of the polymorphic double carbonates fairchildite and buetschliite, (K2Ca(CO3)2): an in situ X-ray powder diffraction study† 多晶双碳酸盐（K2Ca(CO3)2）的机械化学合成与转化：原位x射线粉末衍射研究。

RSC Mechanochemistry Pub Date : 2024-11-28 DOI: 10.1039/D4MR00093E

Volker Kahlenberg, Doris E. Braun, Wolfgang Schmidt, Hang Liu, Sebastian Leiting and Claudia Weidenthaler

{"title":"Mechanochemical synthesis and transformation of the polymorphic double carbonates fairchildite and buetschliite, (K2Ca(CO3)2): an in situ X-ray powder diffraction study†","authors":"Volker Kahlenberg, Doris E. Braun, Wolfgang Schmidt, Hang Liu, Sebastian Leiting and Claudia Weidenthaler","doi":"10.1039/D4MR00093E","DOIUrl":"10.1039/D4MR00093E","url":null,"abstract":"This study presents the mechanochemical synthesis of the two K2Ca(CO3)2 polymorphs, fairchildite and buetschliite, from CaCO3 and K2CO3 using a shaker mill. Unlike previous methods requiring high temperatures and prolonged heating, fairchildite, a high-temperature polymorph, is formed initially in all experiments, adhering to Ostwald's rule of stages. Notably, the transformation to the stable buetschliite phase can be achieved by varying milling parameters, particularly frequency and moisture content. The results suggest that pressure, rather than temperature, plays a significant role in this phase transition, with moisture further accelerating the transformation. These findings offer a new, efficient route for the synthesis of these polymorphs, highlighting the critical influence of milling conditions on the reaction pathway.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 1","pages":" 152-158"},"PeriodicalIF":0.0,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11603408/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142776181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanochemical ZIF-9 formation: in situ analysis and photocatalytic enhancement evaluation† 机械化学ZIF-9形成：原位分析和光催化强化评价

RSC Mechanochemistry Pub Date : 2024-11-19 DOI: 10.1039/D4MR00114A

Noelia Rodríguez-Sánchez, Carsten Prinz, Ralf Bienert, Menta Ballesteros, A. Rabdel Ruiz Salvador, Biswajit Bhattacharya and Franziska Emmerling

引用次数: 0

Mechanochemical coupling of two coupled kinesin monomers: comparison with that of the single dimer† 两偶联激酶单体的机械化学偶联：与单二聚体的比较

RSC Mechanochemistry Pub Date : 2024-11-16 DOI: 10.1039/D4MR00057A

Ping Xie

{"title":"Mechanochemical coupling of two coupled kinesin monomers: comparison with that of the single dimer†","authors":"Ping Xie","doi":"10.1039/D4MR00057A","DOIUrl":"https://doi.org/10.1039/D4MR00057A","url":null,"abstract":"The dynamics of cargo transport by two coupled kinesin monomers, such as kinesin-1, kinesin-2 and kinesin-3, is studied theoretically and is compared with that by the corresponding single dimer on the basis of our proposed model for the mechanochemical coupling of the two coupled monomers and that of the single dimer. It is shown that if the stalk, which connects the monomer and cargo, has a short length LS (e.g., LS < 5 nm) the cargo transport by the two monomers can be efficient with an unloaded velocity that can be similar to that by the corresponding single dimer, whereas the cargo transport by the two monomers with a long LS can only be inefficient with an unloaded velocity and a stall force much smaller than those with the short LS. Although the unloaded velocity for the two coupled kinesin-1 monomers with a short LS can be similar to that for the single kinesin-1 dimer, the stall force for the former is reduced by about 2 times relative to that for the latter. The dynamics of the two coupled kinesin-3 KIF1A monomers relative to the single kinesin-3 dimer is similar to that of the two coupled kinesin-1 monomers relative to the single kinesin-1 dimer. By contrast, the stall force for the two kinesin-2 KIF3A monomers with a short LS can be similar to that for the single kinesin-2 KIF3AA, KIF3BB or KIF3AB dimer. The theoretical results agree well with the available experimental evidence. The underlying mechanism of the two coupled kinesin-1 or kinesin-3 monomers with the short LS having an evidently smaller stall force than the corresponding single dimer and the two coupled kinesin-2 KIF3A monomers with the short LS having a stall force similar to that of the corresponding single dimer is explained.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 1","pages":" 127-141"},"PeriodicalIF":0.0,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/mr/d4mr00057a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid mechanochemical synthesis and properties in Pb–Bi–S system†‡ Pb-Bi-S体系的快速机械化学合成与性能研究[j]

RSC Mechanochemistry Pub Date : 2024-11-13 DOI: 10.1039/D4MR00107A

Peter Baláž, Erika Dutková, Nina Daneu, Michal Hegedüs, Matej Baláž, Emmanuel Guilmeau, Róbert Džunda, Mária Bali-Hudáková, Veronika Garbárová, Jianzhong Jiang and Marcela Achimovičová

{"title":"Rapid mechanochemical synthesis and properties in Pb–Bi–S system†‡","authors":"Peter Baláž, Erika Dutková, Nina Daneu, Michal Hegedüs, Matej Baláž, Emmanuel Guilmeau, Róbert Džunda, Mária Bali-Hudáková, Veronika Garbárová, Jianzhong Jiang and Marcela Achimovičová","doi":"10.1039/D4MR00107A","DOIUrl":"https://doi.org/10.1039/D4MR00107A","url":null,"abstract":"We prepared a ternary sulfide with a stoichiometry close to Pb6Bi2S9 from PbS, Bi, and S precursors using mechanochemical synthesis. After 5 min of high-energy milling, conversion of the precursors to Pb5.95Bi2.02S9.03 was confirmed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDXS). Further milling (up to 120 min) led to the metal-enriched and sulfur-deficient composition Pb6.40Bi2.24S8.36. Values of the specific surface area of the produced powder samples were used as an indicator of the transition from the mechanical activation mode to the mechanochemical synthesis mode. The products crystallized in the galena structure, with the crystallite size ranging from 5 to 15 nm, as determined by X-ray diffractometry (XRD) with Rietveld refinement and transmission electron microscopy (TEM). The dissolution of Bi from the synthesized nanocrystals corresponds to changes in the specific surface area. Spark plasma sintering (SPS) densified ingots in the temperature range of 300–525 K exhibit semiconducting properties and a low thermal conductivity of 0.38–0.5 W m−1 K−1, making them promising for thermoelectric applications. The possibility of modifying the properties of a ternary Pb–Bi–S system by mechanochemistry paves the way for the synthesis of more sophisticated ternary and multinary structures suitable for energy applications.","PeriodicalId":101140,"journal":{"name":"RSC Mechanochemistry","volume":" 1","pages":" 91-99"},"PeriodicalIF":0.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/mr/d4mr00107a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanosynthesis of ruthenium trisbipyridyl complexes and application in photoredox catalysis in a ball-mill† 三联吡啶钌配合物的机械合成及其在球磨机光氧化还原催化中的应用

RSC Mechanochemistry Pub Date : 2024-11-08 DOI: 10.1039/D4MR00112E

Florian Luttringer, Matthieu Lavayssiere, Enita Rastoder, Nikita Salov, Tristan Gravelet, François Quintin, Julien Pinaud, Frédéric Lamaty and Xavier Bantreil

引用次数: 0

Experimental and kinetic modelling study of NC palladacycles mechanosynthesis† 数控palladycle机械合成的实验与动力学建模研究

RSC Mechanochemistry Pub Date : 2024-11-08 DOI: 10.1039/D4MR00082J

Rachel J. Allenbaugh, Tia M. Ariagno and Jeffrey Selby

引用次数: 0

Trapping in situ generated CF3-nitrile imines with maleimides under solvent-free mechanochemical conditions† 在无溶剂机械化学条件下用马来酰亚胺捕获原位生成的cf3 -腈亚胺†

RSC Mechanochemistry Pub Date : 2024-11-07 DOI: 10.1039/D4MR00075G

Greta Utecht-Jarzyńska, Szymon Jarzyński and Marcin Jasiński

引用次数: 0