Sustainable Materials and Technologies最新文献

{"title":"A review on recycling seashells as aggregates and binders for mortar and concrete in China: Production, engineering properties and new applications","authors":"Ziming Deng ,&nbsp;Jinjia Lin ,&nbsp;Ning Li","doi":"10.1016/j.susmat.2025.e01242","DOIUrl":"10.1016/j.susmat.2025.e01242","url":null,"abstract":"<div><div>The increasing amount of seashell waste have become a large burden on China's coastal cities. Recycling discarded seashells as binders and aggregates for mortar and concrete is a promising solution. Chinese institutions have conducted extensive research on the performance of mortar and concrete made with seashell aggregates and binders. However, there is currently no comprehensive review that summarizes findings reported by Chinese institutions. This may hinder the engineering application of seashell mortar and concrete. Due to a lack of systematic review, engineers and designers lack a reference for using seashell mortar and concrete in engineering projects. To fill these gaps, this article reviews the literature published by Chinese institutions in the past decade on the substitution of discarded seashells for cement, fine aggregates, and coarse aggregates. Reduced flowability and mechanical properties and increased drying shrinkage are critical issues for seashell mortar and concrete. Adding superplasticizers can alleviate the reduction in flowability. Incorporating fibers and surface treatment of seashell aggregates can increase mechanical properties and reduce drying shrinkage. In recent years, new seashell mortar and concrete have been proposed, increasing their potential engineering applications. Using seashell powder can increase resistance to biological adhesion in reef concrete and extend its service life. Coarse seashell aggregates filled with polyurethane foam can be used to produce lightweight concrete members. Surface treatment of seashell aggregates with polyvinyl alcohol and sodium silicate solutions can alleviate the shortcomings of seashell aggregates and improve mechanical properties and durability so that this surface-modified seashell mortar and concrete can be applied in most areas. Superhydrophobic seashell mortar and concrete have good chloride resistance and are suitable for use in coastal areas. The following research gaps should be addressed in future research. The influence of seashell content on environmental benefits remains scarce. The influence of calcined seashell powder on the setting time of concrete should be fully understood in future research. The influence of fiber type on the tensile strength of seashell mortar and concrete remains unknown. The influence of surface treatment of seashell aggregates with polyvinyl alcohol and sodium silicate solutions remains unclear and should be investigated in future studies.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01242"},"PeriodicalIF":8.6,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances and challenges of the spray drying technology: Towards accurately constructing inorganic multi-functional materials and related applications","authors":"Shenghua Zhang ,&nbsp;Guannan Gong ,&nbsp;Huan Wang ,&nbsp;Sen Chen ,&nbsp;Jiangyan Wang ,&nbsp;Jian Qi","doi":"10.1016/j.susmat.2025.e01250","DOIUrl":"10.1016/j.susmat.2025.e01250","url":null,"abstract":"<div><div>As an efficient, continuous and controllable particle preparation method, spray drying technology has shown unique advantages and broad application prospects in the synthesis and application of inorganic multi-functional materials. Through spray drying method, one can not only accurately regulate the composition and structure of material, but also can easily assemble nano-subunits into superstructures. This review first introduces the equipment composition and principle of spray drying technology. Subsequently, this review focused on the structure regulation and composition adjustment of inorganic multi-functional materials through spray drying technology. Finally, this review discusses the challenges and future development directions of spray drying in the preparation of inorganic multi-functional materials. Spray drying technology provides an efficient, flexible and controllable path for the synthesis of inorganic multi-functional materials. Its continuous technological innovation and application expansion will continue to promote the rapid development of related fields.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01250"},"PeriodicalIF":8.6,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Difunctional (heterogeneous doping of BN)@Fe3O4@Ppy composite for excellent microwave absorption performance in mid-to-low frequency range and high-efficient thermal management","authors":"Zhongyang Duan ,&nbsp;Zhen Lv ,&nbsp;Chengming Zhang ,&nbsp;Yu Zhang ,&nbsp;Yufeng Bai ,&nbsp;Di Yin ,&nbsp;Rui Wen ,&nbsp;Tai Peng","doi":"10.1016/j.susmat.2025.e01248","DOIUrl":"10.1016/j.susmat.2025.e01248","url":null,"abstract":"<div><div>As AI technology advances rapidly, addressing mid to low-frequency electromagnetic wave pollution and thermal management in precision electronic devices is essential. Integrating microwave absorption and thermal management into dual-functional composites is a promising solution to these challenges. Herein, BCNO@Fe₃O₄@Ppy (BFePP) absorbers possessing a core-shell structure were successfully fabricated by depositing Fe₃O₄ and polypyrrole (Ppy) covering the surface of previously prepared C, O hetero element doped h-BN (BCNO) by hydrothermal and in situ growth techniques. The BFePP three-component system facilitates the multi-wall reflection and scattering of electromagnetic waves, significantly enhancing its electromagnetic wave attenuation performance. The electrical conductivity can be precisely tuned by adjusting the Ppy content, thereby optimizing impedance matching with free space and improving wave attenuation efficiency. Notably, BFePP-2 exhibited a minimum reflection loss (RLmin) of −52.58 dB at 4 GHz and an effective absorption bandwidth (EAB) of 4.3 GHz, underscoring its remarkable capacity for efficiently absorbing low- and medium-frequency electromagnetic waves. In addition, the effective wave-absorbing range of BFePP-2 spans nearly the entire test spectrum. The precise structural design allows Fe₃O₄ and Ppy to grow orderly on the BCNO surface, significantly reducing interfacial thermal resistance and phonon scattering, thus enhancing heat transfer efficiency. Furthermore, the presence of Ppy on the surface of the composite facilitates the dispersion of the composite within the EP, leading to a reduction in interfacial thermal resistance. This improved dispersion boosts heat conduction across the system. Consequently, the thermal conductivity of BFePP-2/EP reaches 1.8 W(m·K)⁻¹, a 611.46 % increase compared to pure EP. This study introduces an innovative approach for optimizing microwave absorbers, holding significant promise for future research and technological advancements in this area.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01248"},"PeriodicalIF":8.6,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revolutionizing mineral recovery: The untapped potential of non-explosive expansive agents for eco-friendly mining","authors":"T. Kannangara,&nbsp;P.G. Ranjith","doi":"10.1016/j.susmat.2025.e01238","DOIUrl":"10.1016/j.susmat.2025.e01238","url":null,"abstract":"<div><div>The growing global demand for minerals, coupled with the environmental and energy inefficiencies of traditional mining, underscores the need for more sustainable alternatives. In-situ Mineral Recovery (IMR) offers such a solution by extracting minerals directly from deep ore deposits. However, its widespread adoption is challenged by environmental concerns, particularly groundwater contamination and host rock permeability. This study investigates the use of a Slow-Releasing Energy Material Agent (SREMA), a non-explosive expansive material, to address these challenges by enhancing rock preconditioning in IMR. We analyze the hydration dynamics, admixture effects, fracture initiation mechanisms, applications and limitations of SREMA, demonstrating its ability to control fracture propagation and improve rock fracturing efficiency. Our findings suggest that optimizing factors like water content, chemical composition and injection well design parameters can further enhance SREMA's performance. The study emphasizes the importance of developing SREMA with specific properties tailored for IMR, including appropriate viscosity, flowability, and water resistance, to ensure an interconnected fracture network in deep underground conditions. Furthermore, it underscores SREMA's potential to reduce the environmental impact of traditional rock preconditioning methods and contribute to more sustainable mining practices while also identifying areas for future research to refine SREMA efficacy and explore novel applications, thereby facilitating more eco-friendly and efficient mineral recovery processes.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01238"},"PeriodicalIF":8.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of sustainable au nanoparticle-decorated graphene-derivatives-electroactive polyimide catalysts for efficient water remediation","authors":"Yi-Sheng Chen ,&nbsp;Wei-Zhong Shi ,&nbsp;Yi-Jen Huang ,&nbsp;Mei-Hui Tsai","doi":"10.1016/j.susmat.2025.e01249","DOIUrl":"10.1016/j.susmat.2025.e01249","url":null,"abstract":"<div><div>Utilizing sustainable <em>Xanthosoma sagittifolium</em> leaf powder, this research synthesized reduced graphene oxide (XrGO) and thiol-functionalized XrGO (TXrGO), foundational for producing Au nanoparticle (AuNPs) decorated graphene derivatives-electroactive polyimide (GDs-EPI). Notably, the AuNPs are anchored to GDs-EPI through in-situ reduction of HAuCl₄. The study provided insights into the mechanisms of contaminant transformation and the interactions between the catalysts and contaminants through structural and morphological analyses of these nanocomposites using techniques such as FT-IR, XRD, TGA, SEM/TEM, CV, and XPS. Au/TXrGO-EPI was identified as the most efficient catalyst, attributed to the synergistic effects between AuNPs with smaller sizes (40.0 nm) and GDs-EPI with high electroactivity-promoted electron transport. The degradation efficacy of these nanocomposites against 4-nitrophenol (4-NP) and methylene blue (MB) was assessed in aqueous solutions at room temperature, employing NaBH₄ as a reducing agent. Au/TXrGO-EPI exhibited remarkable catalytic performance and stability, maintaining activity without morphological change over 15 consecutive runs and achieving pseudo-first-order kinetic rate constants of 1.3 × 10⁻² s⁻¹ and 5.4 × 10⁻² s⁻¹ for the reduction of 4-NP and MB reduction, respectively. The study demonstrates that Au/GDs-EPI nanocomposites can serve as strong heterogeneous catalysts for reducing nitroaromatic compounds and toxic dyes in water treatment by chemical reduction, supporting environmentally friendly remediation practices.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01249"},"PeriodicalIF":8.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization and environmental footprint of crosslinked faba bean starch-based ecofilms reinforced with tunicate cellulose nanocrystals","authors":"Kehinde James Falua,&nbsp;Amin Babaei-Ghazvini,&nbsp;Bishnu Acharya","doi":"10.1016/j.susmat.2025.e01236","DOIUrl":"10.1016/j.susmat.2025.e01236","url":null,"abstract":"<div><div>The growing demand for sustainable materials has intensified efforts to valorize by-products such as faba bean starch (FBS), a co-product of seed fractionation currently lacking high-value applications. This study investigates the development of ecofilms from crosslinked air classified (65 % starch content) and isolated (95 % starch content) FBS, reinforced with tunicate cellulose nanocrystals (t-CNCs, 0–6 wt% relative to starch dry weight). Isolated FBS films exhibited superior moisture resistance, with an 8.13 % reduction in water vapor permeability (WVP) at 6 wt% t-CNC, while air classified films showed increased WVP upon t-CNC inclusion. Water solubility ranged from 34.35 % to 53.92 %, and the water contact angle decreased slightly due to hydrogen bonding facilitated by surface hydroxyl groups of the starch and t-CNC. Tensile strength (TS) improved to 3.41 MPa in isolated FBS films at 4 wt% t-CNC threshold compared to 2.95 MPa at 4 wt% t-CNC for air FBS classified films, with elongation at break maintained between 20 and 40 % in all the films. SEM analysis revealed increased surface roughness at higher t-CNC concentrations, FTIR confirmed successful component blending, and XRD indicated amorphous film structures. Antimicrobial activity showed efficacy against food spoilage pathogen (<em>E. coli</em>), while thermal stability (97 % weight retention at 150 °C), and a low carbon footprint underscore the films' suitability for sustainable food packaging. These results position crosslinked FBS/t-CNC ecofilms as high-performance, sustainable alternatives to conventional plastics, advancing the development of eco-friendly materials for diverse applications.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01236"},"PeriodicalIF":8.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved form stability, thermal storage capacity and thermal conductivity of polyurethane based waste sponge carbon/expanded graphite/organic phase change materials coated by Ag nanoparticles","authors":"Shanshan Wang ,&nbsp;Xiaobin Gu ,&nbsp;Turgay Kar ,&nbsp;Ahmet Sarı ,&nbsp;Esma Çakır ,&nbsp;Temel Varol ,&nbsp;Serhatcan Berk Akçay ,&nbsp;Osman Gencel ,&nbsp;Gökhan Hekimoğlu ,&nbsp;V.V. Tyagi","doi":"10.1016/j.susmat.2025.e01245","DOIUrl":"10.1016/j.susmat.2025.e01245","url":null,"abstract":"<div><div>Organic solid-liquid phase change materials (PCMs) with high thermal energy storage (TES) capacity and nearly constant phase change temperature suffer from leakage issue and low thermal conductivity(TC). In this scope, this study is aimed to evaluate polyurethane based waste sponge carbon (PUWSC) as an effective carrier matrix for shape-stabilizing three kinds of organic PCMs ((lauric acid(LA), lauryl alcohol(LAl) and methyl palmitate(MP)) to prevent leakage issue which restrict their usage in practical TES requirements. The TC values of the shape-stable PUWSC/LA, PUWSC/LAl and PUWSC/MP composite PCMs were significantly increased through adding expanded graphite (EG) and electroless coating of silver nanoparticles (AgNPs). All the characterization, thermal and energy storage properties of the PUWSC/PCM and PUWSC/EG/PCM@Ag composites created as shape-stable PCMs (SSPCMs) have been systematically investigated. The PUWSC/PCM composites had melting temperature range of 20–40 °C and 72–94 J/g while the PUWSC/EG/PCM@Ag composites showed melting heat storage capacity of 92–120 J/g. The EG and Ag nanoparticle contents of the SSPCMs postponed the degradation temperature of pure PCMs, LA, LAl and MP as about 6–50 °C. The changes in the enthalpy capacities were determined within around 2–4 % after 1000 cycles compared to pure PCMs. With both EG addition and Ag coating, the enhancement ratio in TCs of the SSPCMs were reached about 217–222 % compared with pure PCMs. In addition, the boosting trend in TC was verified by comparatively monitoring the variation in the surface temperature of the SSPCMs using thermal camera imaging. Relatively high PCM loading, energy storage capacity, thermal conductivity, thermal stability and thermal reliability make the produced SSPCMs as promising materials for TES practices at temperature interval of 20–40 °C.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01245"},"PeriodicalIF":8.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic SnO₂-TiO₂ nanostructures: Dual function catalysts as efficient photocatalyst for industrial dye removal and bifunctional electrocatalyst for energy generation through overall water splitting","authors":"Rekha B. Rajput ,&nbsp;Komal S. Wagh ,&nbsp;Sagar M. Mane ,&nbsp;Jaewoong Lee ,&nbsp;Rohidas B. Kale","doi":"10.1016/j.susmat.2025.e01246","DOIUrl":"10.1016/j.susmat.2025.e01246","url":null,"abstract":"<div><div>To provide more sophisticated environmental applications, this work investigates the dual functioning of composite including titanium dioxide spheres anchored with tin dioxide nanospheres. Specifically, the fabricated composite was explored for the effective destruction of industrial dye pollutants (photocatalysts) and overall water-splitting capabilities (electrocatalysts). The removal of the anionic dye pollutant Methyl Orange (MO) was studied under both LED and sunlight irradiation, while the optimized composite was utilized for the degradation of the cationic dye Crystal Violet (CV) under sunlight exposure. A sample with 70 wt% SnO₂ nanospheres and 30 wt% TiO₂ spheres achieved 94 % degradation of anionic MO dye in 20 min under LED irradiation and 90 % degradation in 2 min under sunlight. For cationic Crystal Violet dye, it reached 92 % degradation within 20 min under sunlight irradiation. Electrochemical estimations exploiting linear sweep voltammetry (LSV) in an alkaline media of potassium hydroxide demonstrated that the composite catalysts that have optimum photocatalytic performance flashed heightened electrocatalytic performance compared to individual TiO₂, SnO₂, and other composite ratios. As an electrocatalyst, the 70 %Sn −30 %Ti loaded on the Ni-foam reveals an overpotential of 211 mV with a Tafel slope of 108.6 mV dec⁻¹ during HER activity. This electrode also exhibits superior performance during OER activity, with a minimal potential of 296.2 mV and a Tafel slope of 104.3 mV dec⁻¹. Furthermore, the electrolyzer composed of symmetric 70 %Sn-30 %Ti shows off a potential of 1.69 V. It maintains exceptional consistency with a negligible change of 1.17 % after 22 h, sustaining at a 10 mA cm⁻² current density during electrocatalytic overall water splitting. The focus is placed on showcasing the versatile potential of TiO₂@SnO₂ composites as highly effective photocatalysts and electrocatalysts.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01246"},"PeriodicalIF":8.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional dye-doped liquid crystal smart windows: From sunlight manipulation to sunlight utilization","authors":"Huimin Zhang ,&nbsp;Shumeng Guo ,&nbsp;Zongcheng Miao ,&nbsp;Wenbo Shen","doi":"10.1016/j.susmat.2025.e01244","DOIUrl":"10.1016/j.susmat.2025.e01244","url":null,"abstract":"<div><div>Liquid crystals are crucial to dynamic control over light transmission to fulfill various demands in energy saving, privacy protection, and information display, emerging as a promising choice for smart windows. Nevertheless, owing to the limitation of mesogenic materials, the functions of many liquid crystal smart windows cannot meet the needs of practical applications, and their application scenarios are also suppressed. Particularly, conventional liquid crystal windows focus on sunlight manipulation while neglecting sunlight utilization. To address the demands of multifunctionality and practicality, the combination of mesogenic materials and functional dyes provides a judicious strategy to ameliorate functions for smart windows. In this review, the recent developments in functional dye-doped LC smart windows are summarized and the roles of the dyes in sunlight manipulation and sunlight utilization are highlighted. The general configuration and working principles for liquid crystal smart windows are elucidated. The working principle and sunlight dimming/utilization effects of the LC windows doped dichroic dyes, photoactive dyes, and photothermal dyes are outlined. Finally, the development trends and prospects of smart windows from dye-doped LC materials are also pointed out.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01244"},"PeriodicalIF":8.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complete recycling and valorization of waste cotton-spandex blended fabrics into value-added UV-blocking cellulose/graphene films and transparent polyurethane film","authors":"Guangmei Xia ,&nbsp;Yingying Ma ,&nbsp;Junqi Jiao ,&nbsp;Xiaohui Yao ,&nbsp;Jinming Zhang ,&nbsp;Xingxiang Ji ,&nbsp;Fengshan Zhang ,&nbsp;Jun Zhang","doi":"10.1016/j.susmat.2025.e01234","DOIUrl":"10.1016/j.susmat.2025.e01234","url":null,"abstract":"<div><div>Most of waste textiles are disposed by incineration and landfill, leading to huge waste of natural resources and seriously ecological disasters. Hence, complete recycling and valorization of waste textiles into value-added products via a relatively economical and green approach is important and meaningful. This work presented a method of highly utilizing waste cotton-spandex fabrics to prepare value-added UV-blocking cellulose/graphene films and transparent polyurethane (PU) film based on the solubility difference of cotton and spandex fibers in 1-allyl-3-methylimidazolium chloride (AmimCl). It was found that AmimCl can dissolve cotton fibers efficiently without destroying the spandex fibers and waste spandex fibers were separated successfully from cellulose solution. Subsequently, the cellulose/AmimCl solution was in-situ composited with graphene to prepare the cellulose/graphene composite films with good mechanical, thermal and UV-blocking properties. Particularly, the tensile strength of cellulose/graphene films can reach as high as 15.1 MPa. Moreover, the UV-blocking capacity of cellulose/graphene films was improved significantly by increasing the content of graphene. Thus, cellulose/graphene films displayed huge potentials to be employed in anti-ultraviolet packaging and wrapping fields. Additionally, the polyurethane (PU) film with good self-adhesion, high transparency and elasticity was also obtained by dissolving the recovered spandex fibers in <em>N</em>,<em>N</em>-Dimethylformamide (DMF). As a result, waste cotton-spandex fabrics were completely recycled and valorized into high-value added cellulose/graphene films and polyurethane film by a relatively facile, feasible and eco-friendly process.</div></div>","PeriodicalId":22097,"journal":{"name":"Sustainable Materials and Technologies","volume":"43 ","pages":"Article e01234"},"PeriodicalIF":8.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}