RSC sustainability最新文献_第8页

A comprehensive pre-treatment strategy evaluation of ligno-hemicellulosic biomass to enhance biogas potential in the anaerobic digestion process 评估木质纤维素生物质的综合预处理策略，以提高厌氧消化过程中的沼气潜力

RSC sustainability Pub Date : 2024-08-09 DOI: 10.1039/D4SU00099D

Rajesh Kumar Prasad, Anjali Sharma, Pranab Behari Mazumder and Anil Dhussa

{"title":"A comprehensive pre-treatment strategy evaluation of ligno-hemicellulosic biomass to enhance biogas potential in the anaerobic digestion process","authors":"Rajesh Kumar Prasad, Anjali Sharma, Pranab Behari Mazumder and Anil Dhussa","doi":"10.1039/D4SU00099D","DOIUrl":"10.1039/D4SU00099D","url":null,"abstract":"Effective pretreatment of ligno-hemicellulosic biomass has emerged as a pre-requisite for its efficient conversion into biogas through the anaerobic digestion (AD) process. Assessment of various pre-treatment methods shows microbial pretreatment to be the most promising, economically viable, and environment-friendly option. Microbial pretreatment offers the advantages of low energy consumption and minimal pollution generation, thus making it a promising avenue for enhancing biogas yields from biomass. Fungi and bacteria, along with their enzymes, play pivotal roles in this method. Fungal pretreatment, involving cellulose and lignin-degrading species like brown-rot and white-rot fungi, have shown improved biogas yield. Bacterial and enzymatic pretreatments offer quicker results, making them attractive options for shortening the reaction time. Microbial consortia have shown remarkable efficiency in biomass degradation and its anaerobic digestion under thermophilic conditions. Physical pretreatment methods, such as mechanical size reduction, have shown potential to increase biomass accessibility and enhance biogas production. However, due to its energy-intensive nature and for improving biogas yields, further research is needed to develop more cost-effective approaches. The combination of physical and biological pretreatment methods offers a promising approach to effectively pretreat ligno-hemicellulosic biomass for improved biogas production.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 2444-2467"},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00099d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939819","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

Enhancing the H2 yield from photoreforming of natural lignocellulose feedstock by two-stage thermo-alkaline hydrolysis pretreatment† 通过两级热碱水解预处理提高天然木质纤维素原料光转化产生的 H2 产量

RSC sustainability Pub Date : 2024-08-08 DOI: 10.1039/D4SU00142G

Wei Wang, Zhenyu Jin, Binhai Cheng and Ming Zhao

{"title":"Enhancing the H2 yield from photoreforming of natural lignocellulose feedstock by two-stage thermo-alkaline hydrolysis pretreatment†","authors":"Wei Wang, Zhenyu Jin, Binhai Cheng and Ming Zhao","doi":"10.1039/D4SU00142G","DOIUrl":"10.1039/D4SU00142G","url":null,"abstract":"The efficiency of hydrogen production from solar water splitting can be substantially increased by adding natural lignocellulosic feedstock as a sacrificial agent in the process. However, the efficiency of the hydrogen yield from photoreforming (PR) natural lignocellulosic feedstock is still far from that of model compounds. In this paper, we report a new pathway for boosting H2 yield by simply applying a commercial SrTiO3 catalyst in PR processes following thermo-alkaline hydrolysis acidizing (TAH-A), thermo-alkaline hydrolysis reversed-phase (TAH-RP) filtration, and two-stage thermo-alkaline hydrolysis (TS-TAH) pretreatment. The efficiency of the hydrogen yield from PR natural lignocellulosic feedstock was significantly improved through all the pretreatments. The greatest enhancement was found for TS-TAH corn stover, where the hydrogen yield reached 4.7 μmol, which is 2.3 times higher than that of TAH-RP filtration. The advantage was attributed to the elimination of most of the lignin from the corn stover following the TS-TAH. This greatly restrained the light-absorbing effect of lignin from the lignin-TAH-PR system, and more light energy was applied to excite the catalyst for H2 evolution. This featured finding potentially provides a feasible method for in-depth utilization of natural lignocellulosic feedstocks in PR hydrogen production technology.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 10","pages":" 2910-2920"},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00142g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939871","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

Leveraging the bio-enabled muconic acid platform via phospha-Michael-addition: intrinsically flame-retardant nylon-66/DOPO copolymers† 通过磷-迈克尔添加利用生物功能粘多酸平台：本质阻燃尼龙-6,6/DOPO 共聚物。

RSC sustainability Pub Date : 2024-08-08 DOI: 10.1039/D4SU00184B

Prerana Carter, Peter M. Meyer, Ting-Han Lee, Dhananjay Dileep, Nickolas L. Chalgren, Sohaima Noreen, Michael J. Forrester, Brent H. Shanks, Jean-Philippe Tessonnier and Eric W. Cochran

{"title":"Leveraging the bio-enabled muconic acid platform via phospha-Michael-addition: intrinsically flame-retardant nylon-66/DOPO copolymers†","authors":"Prerana Carter, Peter M. Meyer, Ting-Han Lee, Dhananjay Dileep, Nickolas L. Chalgren, Sohaima Noreen, Michael J. Forrester, Brent H. Shanks, Jean-Philippe Tessonnier and Eric W. Cochran","doi":"10.1039/D4SU00184B","DOIUrl":"10.1039/D4SU00184B","url":null,"abstract":"Efforts towards developing biobased chemicals primarily focus on generating molecules chemically analogous to those derived from petroleum. The compositional uniqueness of biomass can also be leveraged to reinvigorate the chemical industry with novel multifunctional molecules. We demonstrate the value and potential of these new compounds in the case of Nylon-66, a commodity polyamide that suffers from poor flame resistance. The conventional route to inhibit flammability involves blending the polymer with additives, which improves flame retardance but has mechanical property trade-offs. Herein, we address these limitations through the synthesis of a novel multifunctional comonomer derived from renewably sourced trans-3-hexenedioic acid (t3HDA). t3HDA was subjected to a one-pot isomerisation and functionalisation strategy where the alkene migrates to render this molecule active for phospha-Michael-addition (MA) with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), a halogen-free flame-retardant (FR). This DOPO-functional counit was polymerised into Nylon-66 copolymers and compared with physical blends of DOPO and Nylon-66 using a suite of thermomechanical techniques; analysis revealed comparable crystallinity, flame retardance, and thermomechanical properties for the DOPO-functionalised bio-advantaged polyamides. The synthesis strategy presented herein can be extended to a variety of functional groups and novel properties, a platform for creating bespoke bio-advantaged polymers.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 10","pages":" 2968-2978"},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00184b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141969112","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

Synthesis, characterization and antimicrobial activity of ZnO-QDs @ bis MPA polyester-64-hydroxyl dendrimer nanostructures† ZnO-QDs @ 双 MPA 聚酯-64-羟基树枝状聚合物纳米结构的合成、表征和抗菌活性

RSC sustainability Pub Date : 2024-08-07 DOI: 10.1039/D4SU00116H

Archana Zala and Harshad Patel

{"title":"Synthesis, characterization and antimicrobial activity of ZnO-QDs @ bis MPA polyester-64-hydroxyl dendrimer nanostructures†","authors":"Archana Zala and Harshad Patel","doi":"10.1039/D4SU00116H","DOIUrl":"10.1039/D4SU00116H","url":null,"abstract":"This study presents the successful synthesis and characterization of five novel zinc oxide quantum dots @ bis MPA polyester-64-hydroxyl dendrimer nanostructures with tuneable hydrophilicity. A unique feature of these ZnO quantum dots @ bis MPA polyester-64-hydroxyl dendrimer nanostructures is the functionalization of the bis MPA polyester-64-hydroxyl dendrimer with five different varying numbers of surface hydroxyl functional groups with zinc oxide quantum dots. The surface groups varied from 1, 5, 10, 20 and 40 zinc oxide quantum dots in ZnO-QDs @ bis MPA polyester-64-hydroxyl dendrimer nanostructures, respectively. The highly water-dispersible ZnO quantum dots @ bis MPA polyester-64-hydroxyl dendrimer nanostructures G4-R(ZnO-QDs)1, G4-R(ZnO-QDs)5, G4-R(ZnO-QDs)10, G4-R(ZnO-QDs)20 and G4-R(ZnO-QDs)40 were chemically synthesized. The ZnO-QDs @ bis MPA polyester-64-hydroxyl dendrimer nanostructures were characterized using techniques such as UV-vis-NIR spectroscopy, atomic force microscopy, dynamic light scattering, attenuated total reflectance Fourier transform infrared spectroscopy, and Raman spectroscopy. Notably, these ZnO quantum dots @ bis MPA polyester-64-hydroxyl dendrimer nanostructures exhibited high water-dispersibility. A significant finding is that the unique feature of ZnO quantum dots @ bis MPA polyester-64-hydroxyl dendrimer nanostructures demonstrated synergistic antibacterial activity against Gram-positive bacteria. This research contributes to the growing field of nanotechnology by providing a method to tune the hydrophilicity, optical properties, molecular vibration, size and toxicity of nanostructures, which could have broad impacts on various scientific and technological domains.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 10","pages":" 2989-3000"},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00116h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939874","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 screening of toxicity to thermotolerant yeasts: inhibition of growth and fermentation by ionic liquids and zwitterions† 快速筛选耐热酵母菌的毒性：离子液体和齐聚物对生长和发酵的抑制作用

RSC sustainability Pub Date : 2024-08-06 DOI: 10.1039/D4SU00239C

Mayu Shibata, Ayumi Hachisu, Souta Uemori, Hitomi Tobe, Kazuaki Ninomiya and Kosuke Kuroda

{"title":"Rapid screening of toxicity to thermotolerant yeasts: inhibition of growth and fermentation by ionic liquids and zwitterions†","authors":"Mayu Shibata, Ayumi Hachisu, Souta Uemori, Hitomi Tobe, Kazuaki Ninomiya and Kosuke Kuroda","doi":"10.1039/D4SU00239C","DOIUrl":"10.1039/D4SU00239C","url":null,"abstract":"For extremely efficient bioethanol production, simultaneous pretreatment, saccharification, and fermentation in the same reaction pot (called a one-pot process) is necessary. Thermotolerant yeast Kluyveromyces marxianus can ferment at around 50 °C and is thus suitable for this process. We have developed cellulose-dissolving zwitterionic liquids, which are suitable pretreatment solvents to enable a one-pot process. On the other hand, there are no studies of the toxicity to yeasts including Kluyveromyces marxianus. We here studied the toxicity after establishing the screening methods applicable to high temperature. The zwitterion was confirmed to be low-toxic in most cases, compared to the most famous cellulose-dissolving ionic liquid. We further subjected two natural zwitterions, trimethylglycine and L-carnitine, to the same screening. Trimethylglycine, especially, was low-toxic, while it does not dissolve cellulose. The inhibition of growth and fermentation depended on the ion species, concentration, microorganism species, and temperature.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 10","pages":" 2921-2929"},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00239c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939872","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

The search for rigid, tough polyesters with high Tg – renewable aromatic polyesters with high isosorbide content† 寻找具有高 Tg 的刚性、韧性聚酯--高异山梨醇含量的可再生芳香族聚酯

RSC sustainability Pub Date : 2024-08-01 DOI: 10.1039/D4SU00294F

Bruno Bottega Pergher, Daniel H. Weinland, Robert-Jan van Putten and Gert-Jan M. Gruter

{"title":"The search for rigid, tough polyesters with high Tg – renewable aromatic polyesters with high isosorbide content†","authors":"Bruno Bottega Pergher, Daniel H. Weinland, Robert-Jan van Putten and Gert-Jan M. Gruter","doi":"10.1039/D4SU00294F","DOIUrl":"10.1039/D4SU00294F","url":null,"abstract":"Renewable polyesters with a good balance between impact strength and elastic modulus (stiffness) are not very common, especially when combined with high glass transition temperature (Tg). Achieving such high performance properties would enable the substitution of high performance polymers like ABS and polycarbonate with chemically recyclable polyesters from bio-based or recycled sources. One of the challenges in developing these materials is to select the right composition of the right monomers/comonomer ratios and making these materials with high molecular weight, which can be challenging since some of the most promising rigid diols, such as isosorbide, are unreactive. This study comprises aromatic polyesters from (potentially) renewable monomers, using bio-based isosorbide as a means to increase their Tg and to inhibit their crystallization, while using flexible co-diols to improve impact strength. To incorporate a high amount of isosorbide into the targeted polyesters, we used the synthesis method with reactive phenolic solvents previously developed in our group. The selected compositions display high Tg's (>90 °C) and high tensile modulus (>1850 MPa). We show that more polar monomers such as the stiffer 2,5-furandicarboxylic acid (FDCA) and diethylene glycol cause high stiffness but decreased impact strength (<5 kJ m−2). Combining terephthalic acid and isosorbide with more flexible diols like 1,4-butanediol, 1,4-cyclohexanedimethanol (CHDM) and 1,3-propanediol provides a better balance, including the combination of high tensile modulus (>1850 MPa) and high impact strength (>10 kJ m−2).","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 2644-2656"},"PeriodicalIF":0.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00294f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882204","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

Catalytic function of ionic liquids in polyethylene terephthalate glycolysis by molecular dynamics simulations† 通过分子动力学模拟研究离子液体在聚对苯二甲酸乙二酯糖酵解过程中的催化功能

RSC sustainability Pub Date : 2024-07-30 DOI: 10.1039/D4SU00251B

Mohamed Ahmed Nosir and Manuel Angel Ortuño

{"title":"Catalytic function of ionic liquids in polyethylene terephthalate glycolysis by molecular dynamics simulations†","authors":"Mohamed Ahmed Nosir and Manuel Angel Ortuño","doi":"10.1039/D4SU00251B","DOIUrl":"10.1039/D4SU00251B","url":null,"abstract":"Chemical recycling is of paramount importance to minimise the environmental impact of plastic waste. Polyethylene terephthalate (PET) is a polar thermoplastic widely used in fibres and packaging and is amenable to chemical depolymerisation. Recent efforts are devoted to its degradation via glycolysis. Even though it requires milder conditions than hydrolysis, catalysts are still necessary. In this case, ionic liquids (ILs) come into play to catalyse the reaction. In particular, we focus on choline-based liquids due to their low toxicity and cost compared to imidazolium-based ones. However, due to the complexity of the process, detailed information on the operating mechanism is scarce, which hinders the progress towards a rational design of new and more efficient systems. Herein, we present a computational study to address the role of IL catalysts during PET glycolysis under realistic catalytic conditions, i.e., considering time, concentration, and temperature. We perform classical molecular dynamics (MD) simulations on several systems, including a complex ternary mixture formed by ethylene glycol (EG), PET oligomers, and the [Ch]3[PO4] catalyst. By means of radial/spatial distribution functions, H-bond analysis, and domain count, we present a detailed solvation scenario of the catalytic system. Our findings suggest that the IL anion (and the IL cation to a lesser extent) does participate in the nucleophilic activation of EG, while the IL cation does not play a significant role in the electrophilic activation of PET.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 2677-2683"},"PeriodicalIF":0.0,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00251b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870610","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

Coloration of ultraviolet-C-assisted combined desizing-scouring cotton fabric 紫外线-C 辅助联合退浆-梳理棉织物的着色效果

RSC sustainability Pub Date : 2024-07-29 DOI: 10.1039/D4SU00309H

Sanjay Kumar Bhikari Charan Panda, Samrat Mukhopadhyay and Kushal Sen

{"title":"Coloration of ultraviolet-C-assisted combined desizing-scouring cotton fabric","authors":"Sanjay Kumar Bhikari Charan Panda, Samrat Mukhopadhyay and Kushal Sen","doi":"10.1039/D4SU00309H","DOIUrl":"10.1039/D4SU00309H","url":null,"abstract":"The textile chemical processing industry is one of the most polluting industries. The water and energy consumption in textile wet processing is very high and produces vast amounts of effluent. Desizing, scouring, bleaching, and mercerising are the essential processes involved in textile pretreatment. A novel photocatalytic technique is implemented to minimise the consumption of energy, water and time in a combined desizing and scouring process. The industrial woven cotton grey fabric is treated with an oxidising agent in the padding method and irradiated under ultraviolet-C (UVC). Then, the UVC-exposed fabric is washed at a lower temperature than that used in conventional washing. Furthermore, the scoured fabric is dyed with reactive dyes to study its dyeability. This technique saves 79% of the processing time and is superior to the conventional process in terms of dyeability. The water and energy consumption of the demonstrated process is reduced by 71% and 72%, respectively. The fabric properties are analysed using weight loss, tensile strength, absorbency time, whiteness, colour value, colour fastness, FTIR, WXRD, SEM, and EDX. Life cycle analysis is also conducted.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 2657-2668"},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00309h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870569","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

A cooperative nanoscale ZnO–NiO–Ni heterojunction for sustainable catalytic amidation of aldehydes with secondary amines† 纳米级 ZnO-NiO-Ni 异质结在醛与仲胺的可持续催化氨化中的协同作用

RSC sustainability Pub Date : 2024-07-29 DOI: 10.1039/D4SU00304G

Amishwar Raysing Shelte, Rahul Daga Patil and Sanjay Pratihar

{"title":"A cooperative nanoscale ZnO–NiO–Ni heterojunction for sustainable catalytic amidation of aldehydes with secondary amines†","authors":"Amishwar Raysing Shelte, Rahul Daga Patil and Sanjay Pratihar","doi":"10.1039/D4SU00304G","DOIUrl":"10.1039/D4SU00304G","url":null,"abstract":"Metal–metal hydroxide/oxide interface catalysts are valued for their multiple active sites, enabling synergistic reactions in close proximity for advanced catalytic applications. Herein, we present a highly efficient and sustainable method for synthesizing amides through oxidative amidation reactions involving aldehydes and secondary amines. The method utilizes tert-butyl hydroperoxide (TBHP) as the oxidant in THF at 90 °C and employs well-defined nanoscale heterojunctions of zinc oxide, nickel oxide, nickel [ZnO–NiO–Ni] (ZN-O-A-7) as a recyclable heterogeneous catalyst. The ZnO–NiO–Ni heterostructure and their synergistic cooperation are crucial for enhancing the efficiency and selectivity of the oxidative amidation reaction. The versatility of the methodology was demonstrated with diverse aldehyde derivatives and secondary amines, including morpholine, thiomorpholine, piperazine, pyrrolidine, and piperidine. Mechanistic investigations via controlled experiments provided insights into the underlying processes. The catalyst demonstrates ease of synthesis, use of stoichiometric amounts of oxidant, excellent selectivity, high functional group tolerance, applicability to various aldehydes and amines, multiple reusability, and potential for large-scale processes. These features collectively enhance the economic and sustainable nature of both the catalyst and the protocol, making a valuable contribution to the field of catalytic amidation reactions.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 2615-2625"},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00304g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870567","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

Multilayered frequency-selective and high-performance electromagnetic interference shielding materials derived from waste polyurethane foam† 从废聚氨酯泡沫中提取的多层频率选择性高性能电磁干扰屏蔽材料

RSC sustainability Pub Date : 2024-07-27 DOI: 10.1039/D4SU00181H

Jian Zhang, Qunhao Wang, Zehang Zhou, Zengyan Sui, Chao Wang and Canhui Lu

{"title":"Multilayered frequency-selective and high-performance electromagnetic interference shielding materials derived from waste polyurethane foam†","authors":"Jian Zhang, Qunhao Wang, Zehang Zhou, Zengyan Sui, Chao Wang and Canhui Lu","doi":"10.1039/D4SU00181H","DOIUrl":"10.1039/D4SU00181H","url":null,"abstract":"The development of electromagnetic interference (EMI) shielding composites with tunable frequency-selective shielding attributes is of critical importance for their applications in military and signal detection fields. This study introduces a multilayered conductive polymer composite comprising waste polyurethane foam (WPUF), ground tire rubber (GTR) powders, carbon nanotubes (CNTs) and cellulose nanofibres (CNFs). The bulky waste polymeric material with a porous structure, WPUF, is utilized as the substrate to construct the rationally designed alternative conductive-insulating multilayered structure, which significantly enhances the multiple-reflection of the incident EM wave. This conductive composite provides enhanced EMI shielding effectiveness and unique tunable frequency-selective EM shielding performance. The EMI shielding peak shifts with the variation of CNTs, and adjusting the GTR/WPUF ratio in the insulating layer enables fine-tuning of its selective EMI shielding performance over a specific frequency range. In addition, the composite demonstrated robust durability, which benefits its practical application. This approach proposes a practical and innovative method for the design and fabrication of advanced frequency-selective EMI shielding composites with bulky polymer wastes.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 9","pages":" 2669-2676"},"PeriodicalIF":0.0,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/su/d4su00181h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770128","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