Sustainable Chemistry and Pharmacy最新文献

{"title":"Synthesis and characterization of a novel eco-friendly adhesive for plywood composed by vinyl acetate-ethylene copolymer emulsion and polyvinyl alcohol","authors":"Mengjie Jia ,&nbsp;Yani Wang ,&nbsp;Yiyang Qi ,&nbsp;Xiaoge Ji ,&nbsp;Zhongyuan Zhao ,&nbsp;Shijing Sun","doi":"10.1016/j.scp.2025.102014","DOIUrl":"10.1016/j.scp.2025.102014","url":null,"abstract":"<div><div>In the plywood industry, formaldehyde-based adhesives are commonly used, but the health risks associated with them are a significant concern. As a result, there has been a growing emphasis on developing formaldehyde-free alternatives. This study presents an eco-friendly adhesive formulated from vinyl acetate-ethylene (VAE) copolymer emulsion and polyvinyl alcohol (PVA). The synthesis conditions, curing behavior, synthesis mechanisms and curing mechanisms were further investigated.</div><div>The optimal preparation conditions were as follows: VAE emulsion and 4 % PVA1788 were synthesized at 90 °C for 2 h, and the solid content was adjusted to 50 % by adding distilled water. Subsequently, 5 % pMDI was incorporated. The wet shear strength of the resulting adhesive, which is 0.93 MPa, met the requirements of the Chinese national standard GB/T 9846-2015 (≥0.7 MPa) for Class II plywood.</div><div>The curing behavior of the VAE-PVA adhesive was investigated by measuring the insoluble mass proportion and thermal analysis. The results showed that when the adhesive was heated at 130 °C for 10 min, the insoluble mass proportion reached 81.16 %, and an endothermic reaction occurred at approximately 100 °C. To investigate the synthesis mechanism of VAE-PVA adhesive, FT-IR analysis revealed that esterification occurred between the VAE emulsion and the hydroxyl groups in PVA. Additionally, FT-IR analysis, XPS analysis, and Py-GC/MS analysis were used to explore the curing mechanism of the VAE-PVA adhesive. The results indicated that during the curing process, pMDI polymerized with the vinyl groups in the VAE emulsion and the hydroxyl groups in PVA, forming a three-dimensional network of cured polymer.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102014"},"PeriodicalIF":5.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A sustainable eco-innovation for water pollutant (Brilliant Blue FCF) detoxification using Diploscapter coronatus","authors":"Shweta P. Thakar ,&nbsp;Bharvi Panchal ,&nbsp;Sunita Chauhan ,&nbsp;Hitesh Chauhan ,&nbsp;Pranav S. Shrivastav ,&nbsp;Linz-buoy George","doi":"10.1016/j.scp.2025.101984","DOIUrl":"10.1016/j.scp.2025.101984","url":null,"abstract":"<div><div>The industrial sector significantly exacerbates global pollution through the release of synthetic dyes, which are persistent environmental contaminants. This study explores the novel use of <em>Diploscapter coronatus</em> nematodes for the sustainable detoxification of brilliant blue FCF, a resilient triarylmethane dye widely utilized in the food and cosmetics industries. By optimizing immobilization within sodium alginate beads, complete dye breakdown into non-toxic residues was achieved, confirmed by UV–Visible spectroscopy, HPTLC, FTIR, and UHPLC-MS. These results demonstrate a green remediation method that aligns with sustainable development goals, offering a scalable and environmentally friendly solution for wastewater management.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 101984"},"PeriodicalIF":5.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring alternative methods for producing extracts with antioxidant and antimicrobial properties from Cercis siliquastrum L. and safety assessment","authors":"Alexandra Spyrou ,&nbsp;Laura Gabriela Elvir-Padilla ,&nbsp;Alexandra A. Ioannidi ,&nbsp;Didilia Ileana Mendoza-Castillo ,&nbsp;Adrián Bonilla-Petriciolet ,&nbsp;Samir Santzouk ,&nbsp;Maria Papadaki ,&nbsp;Maria Antonopoulou","doi":"10.1016/j.scp.2025.102012","DOIUrl":"10.1016/j.scp.2025.102012","url":null,"abstract":"<div><div><em>Cercis siliquastrum</em> L. is considered an important medicinal herb. To provide knowledge that can contribute to scientific literature, the present study focuses on the identification of bioactive compounds of different <em>Cercis siliquastrum</em> L. extracts using GC-MS. Furthermore, the antibacterial activity of <em>Cercis siliquastrum</em> L. extracts against the gram-negative bacterium <em>Escherichia coli (E. coli)</em> was examined. Moreover, a safety evaluation against human cells was performed. A combination of maceration and percolation was used for the extraction of leaves. Additionally, the reuse of the biomass was evaluated through sequential extractions using organic solvents of different polarity to obtain a wide range of secondary metabolites. In total, fourteen bioactive compounds were detected using GC-MS. However, some differences, especially in the compounds identified in each extract as well as in their abundance were observed. The major components of the extracts obtained from the hydroethanolic and methanolic extracts were γ-sitosterol, α-tocopherol and phytol. In the case of the hexane extract octacosane, γ-sitosterol and α-tocopherol were the most abundant constituents. The hydroethanolic extract possessed the most significant antibacterial activity against <em>Escherichia coli</em>, as well as the highest antioxidant activity. Regarding the cytogenotoxic potential of the hydroethanolic extract, none of the tested concentrations led to cytotoxic effects. Although the highest tested concentration (1.50 % v/v) induced micronucleus (MN) formation compared to the control cultures, the difference was not statistically significant, confirming the absence of genotoxic effects. The reuse of the secondary biomass also led to extracts consisting of compounds with beneficial properties and aligns with the circular economy concept.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102012"},"PeriodicalIF":5.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable one-pot production of lignin-based bioactive quinazolinone derivatives","authors":"Qi Luo ,&nbsp;Shenglong Tian ,&nbsp;Qian Qiang ,&nbsp;Qingda An ,&nbsp;Changzhi Li","doi":"10.1016/j.scp.2025.102017","DOIUrl":"10.1016/j.scp.2025.102017","url":null,"abstract":"<div><div>Nitrogen-participated catalytic conversion of lignin into high value-added N-heteroaromatic chemicals, rather than aromatic compounds composed primarily of C, H, and O, is of great importance to cost-effective biorefinery. Herein, a bifunctional I₂-promoted oxidation strategy has been proposed for one-pot synthesis of quinazolinone derivatives under ambient atmosphere, utilizing lignin β-<em>O</em>-4 moieties as the substrates and 2-aminobenzamide as the nitrogen source. This direct synthesis protocol sufficiently exploits the C_β or C_γ atoms to produce desirable derivatives instead of by-products. Experimental and DFT results confirm an integral multistep cascade transformation involving the activation of C<img>O bonds by Lewis acid I₂, sequential amide-participated C–N bonds formation together with N-heteroaromatic ring construction, and oxidative cleavage of C_α-C_β bonds to generate quinazolinone derivatives and phenyl formate, driven by air or I₂/DMSO synergistic oxidation, followed by further oxidation of phenyl formate to yield quinazolinone. Notably, this strategy is effective in converting the oxidized birch lignin into the corresponding desired quinazolinones with a total yield up 25.9 wt%. Interestingly, among the products, 2-(4-hydroxy-3,5-dimethoxyphenyl)-4(3<em>H</em>)-quinazolinone exhibits excellent antimicrobial activity against <em>Staphylococcus aureus</em> and <em>Methicillin-resistant Staphylococcus aureus</em>. Overall, this metal-free catalytic strategy provides a straightforward, sustainable route to value-added aromatic heterocyclic chemicals, transcending the conventional petroleum-based route.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102017"},"PeriodicalIF":5.5,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zinc-based oxides as alternative cheap and stable catalysts for the production of adipates from cyclopentanone and dimethyl carbonate","authors":"Gabriele Galletti ,&nbsp;Davide Allkanjari ,&nbsp;Alessandro Manna ,&nbsp;Elisa Valzano ,&nbsp;Lorenzo Monti ,&nbsp;Nikolaos Dimitratos ,&nbsp;Jacopo De Maron ,&nbsp;Fabrizio Cavani ,&nbsp;Tommaso Tabanelli","doi":"10.1016/j.scp.2025.102018","DOIUrl":"10.1016/j.scp.2025.102018","url":null,"abstract":"<div><div>Developing sustainable catalytic processes for specialty monomers is essential for advancing a renewable-based economy. Adipic acid esters, such as dimethyl adipate (DMA), are key intermediates in polyester and polyamide production and can be synthesized with complete atom economy (100 %) through the reaction of bio-based cyclopentanone (CPO) with dimethyl carbonate (DMC) or other CO₂-derived carbonates. This study evaluates, for the first time, the catalytic performance of ZnO and Zn/Mg mixed oxides for this transformation. ZnO exhibited superior selectivity for DMA (53 %), compared to conventional MgO and CeO₂ catalysts by effectively suppressing heavy by-product formation, thereby inhibiting CPO self-aldol condensation. This suppression minimizes catalyst fouling, allowing ZnO to be easily and readily recovered and reused without significant loss of activity. In contrast, Zn/Mg/O mixed oxides enhanced reaction rates but led to lower selectivity, primarily producing branched methylated adipates, which could serve as alternative polymer precursors. Optimization of catalyst composition and reaction conditions was critical for maximizing diester yields in this one-pot transformation, selectivity producing DMA over ZnO (up to 48 % yield after 7 h of reaction) or DMA and methylated DMAs (with yields higher than 40 % after 3 h of reaction in the presence of Zn/Mg/O). However, dedicated studies on the β-keto-ester intermediate revealed that methanol availability over the catalytic surface at the temperature required for the “one-pot” process (i.e. 260 °C) is a limiting factor. This constraint can reduce DMA yield and productivity due to the unselective decomposition of the intermediate, highlighting an area for further process refinement.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102018"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on mechanical properties, hydration mechanism and carbon emission of phosphogypsum-based sustainable cementitious materials","authors":"YuHua Xia ,&nbsp;Liang Tang ,&nbsp;ZhaoYi He ,&nbsp;JiaXuan Tang ,&nbsp;JiaHao Yu ,&nbsp;DongWei Cao ,&nbsp;Dingbang Wei","doi":"10.1016/j.scp.2025.102016","DOIUrl":"10.1016/j.scp.2025.102016","url":null,"abstract":"<div><div>The excessive stockpiling of phosphogypsum (PG), rich in sulfates, phosphorus, fluorine, and heavy metals, threatens environmental safety if not properly handled. To address this issue, this study developed PG-based sustainable cementitious materials using PG, GBFS, NaOH, and Na₂SO₄. Analytical techniques such as XRD, SEM, and ICP-MS were employed to investigate its strength development mechanisms, hydration characteristics, microstructure, and leaching toxicity. The utilization rate of phosphogypsum is expected to reach 50 %, and the compressive strength is anticipated to exceed 40 MPa. The findings demonstrate that the optimal formulation for cementitious materials consists of 50 % PG, 47 % GBFS, 3 % NaOH and 3 % Na₂SO₄ (external). The compressive strengths at 3, 7, and 28 days are 2.27, 20.46, and 43.54 MPa, respectively, with a PG utilization efficiency of 50 %. An increase in PG content extends the second exothermic peak of the cementitious materials system. Concurrently, NaOH accelerates the hydration process, partially shortening the induction period and promoting the formation of hydration products such as AFt, and C–S–H, thereby enhancing the strength of the cementitious materials. In addition, the leaching concentrations of F- and PO₄³- in PG were 148.23 mg/L and 298.24 mg/L, respectively, which were reduced to 2.364–4.410 mg/L and 0.052–0.220 mg/L in cementitious materials, respectively, and the other pollutants were below the limits specified in the relevant standards. The use of PG-based sustainable cementitious materials significantly reduces the carbon emission index. Under the optimized proportioning, the carbon emission per unit is reduced to 46.8995 kg/m³, which is 394.1005 kg/m³ less than that of ordinary silicate cement, with obvious advantages in energy saving and emission reduction. Due to the presence of gypsum and AFt, phosphogypsum sustainable cementitious material systems have lower shrinkage compared to cement.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102016"},"PeriodicalIF":5.5,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New hyper-crosslinked polymers for enhanced CO2 adsorption: Synthesis and characterization","authors":"Kutalmis Gokkus","doi":"10.1016/j.scp.2025.102015","DOIUrl":"10.1016/j.scp.2025.102015","url":null,"abstract":"<div><div>In this study, new hyper-crosslinked polymers (HCPs) were synthesized with 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) and <em>p</em>-naphtholbenzeine (NB) with different ratios of 4,4′-bis(chloromethyl)-1,1′-biphenyl (BCMBP) through the Fridel-Crafts (FC) method. The polymers were thoroughly characterized by Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analysis, thermogravimetric analysis (TGA), and x-ray diffraction (XRD) confirming the successful synthesis of HCP-PTCDAs and hyper crosslinked p-naphtholbenzein polymers (HCP-NBs). BET analysis revealed that the maximum surface areas of HCP-PTCDA and HCP-NB were 962 m² g⁻¹ and 665.4 m² g⁻¹, respectively. The maximum pore volumes of HCP-PTCDA and HCP-NB were 1.26 cm³ g⁻¹ and 1.90 cm³ g⁻¹, respectively. The enhanced surface area and pore volume of HCP-PTCDAs were attributed to the lack of conformational changes in PTCDA during synthesis. The maximum CO₂ adsorption capacities of the two polymers were obtained with HCP-PTCDA/20 and HCP-NB/5 (at 273 K and 1 bar: 2.75 mmol g⁻¹ and 3.28 mmol g⁻¹, respectively). Although the surface area of HCP-NB/5 was three times lower than HCP-PTCDA/20, it showed higher CO₂ adsorption performance. Accordingly, these results revealed that pore volume and size distribution were one of the most determining parameters in CO₂ adsorption. Compared with the literature, the improved CO₂ adsorption performance, especially that of HCP-NB/5, showed that these polymers had relatively high potential.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102015"},"PeriodicalIF":5.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-value use of whole plants of Eupatorium Adenophora Spreng for aluminium in hydrochloric acid anti-corrosion","authors":"Yun Gao ,&nbsp;Ping Zhu ,&nbsp;Xianghong Li ,&nbsp;Liqing Tang ,&nbsp;Yongqiang Chen ,&nbsp;Yi Zhang ,&nbsp;Juan Xu","doi":"10.1016/j.scp.2025.102008","DOIUrl":"10.1016/j.scp.2025.102008","url":null,"abstract":"<div><div>The differences in corrosion inhibition properties and adsorption mechanisms of Eupatorium Adenophorum Spreng leaves (EASLE), stems (EASSE) and root extracts (EASRE) prepared by thermal reflux method on aluminum in 1.0 M HCl solution were investigated. Findings illustrated that all three extracts demonstrated excellent corrosion inhibition, and 1.0 g/L EASLE had the most excellent performance (<em>η</em>_w as high as 98.43 %). The electrochemical reaction adhered to the ‘geometric coverage effect’, where the addition of the inhibitors increases the charge transfer resistance by eightfold, thereby suppressing the corrosion reaction. The presence of elements and functional groups (O–H, C<img>O, C<img>C, etc.) related to the extracts on the aluminum surface was detected by FTIR and XPS, confirming the adsorption of the extracts. All three extracts contained terpenoids, alkaloids, and other active substances, but the relative content varied significantly. LC-MS analysis revealed that the superior corrosion inhibition performance of EASLE is attributed to the higher relative content of active components, Coumarin and Erucamide. Experiments on single chemical components containing O heteroatoms showed lower corrosion inhibition efficiency (20 %–65 %) compared to the extracts. Theoretical calculations pointed out from the molecular level that the active sites of the compounds are predominantly concentrated in O–H, C<img>O, further suggesting that the significant corrosion inhibition performance of the extracts results from the synergistic effects of multiple components. This study broadens the high-value utilization of Eupatorium Adenophorum Spreng and provides a theoretical basis for its extracts as a greener and more efficient inhibitor of aluminum in acidic media.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102008"},"PeriodicalIF":5.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143786055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the potential of mealworm chitosan for hemodialysis applications","authors":"Maria Martingo,&nbsp;Sara Baptista-Silva,&nbsp;Raquel Mesquita,&nbsp;João Paulo Ferreira,&nbsp;Sandra Borges,&nbsp;Manuela Pintado","doi":"10.1016/j.scp.2025.102013","DOIUrl":"10.1016/j.scp.2025.102013","url":null,"abstract":"<div><div>This study introduces a sustainable and efficient alternative to traditional chitosan sources derived from crustaceans, exploring the extraction and application of insect-derived chitosan from <em>Tenebrio molitor</em> for hemodialysis (HD) membranes design.</div><div>Efficient extraction and deacetylation methods were tested and developed between 6 h and 12 h to obtain chitosan. Chitin was isolated from <em>T. molitor</em> through deproteinization and demineralization, with yields of approximately 5 % (w/w). Chitosan was obtained from the extracted chitin resulting in yields of between 65.0 and 79.3 (w/w). Characterization using FTIR confirmed structural similarities with commercial chitosan and degrees of deacetylation in the 73–75 % range. The bioactive properties of chitosan obtained from <em>T. molitor</em>, including antimicrobial and antioxidant activities, were evaluated. All the microorganisms tested were inhibited, exhibiting minimum lethal concentrations between 2 and 8 mg/mL. In addition, chitosan showed antioxidant activity in the range of 60–65 μmol Trolox equivalent/g, suggesting its viability for various medical applications. This study additionally allowed the design of sustainable hybrid chitosan membrane (CH-M) tailored for HD applications. The permeation characteristics of CH-M for urea and albumin were studied in vitro to assess their suitability as HD membranes. Urea was permeable to values of over 70 % and albumin was retained. Also, cytotoxicity assays against L929 fibroblast cells demonstrated that the CH-M samples exhibit low metabolic inhibition (around 15 %) The application of CH-M in HD represents a significant advance, offering the potential for enhanced therapeutic outcomes for chronic kidney disease (CKD).</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102013"},"PeriodicalIF":5.5,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green and efficient depolymerization and recycling of polyester/cotton blended fabrics by ethanolamine","authors":"Nana Liu,&nbsp;Jiayao Zhou,&nbsp;Ruotong Wang,&nbsp;Jingwen Zhang,&nbsp;Zihe Yang,&nbsp;Fei Tian,&nbsp;Yuanyuan Hu,&nbsp;Zhansheng Wu","doi":"10.1016/j.scp.2025.102011","DOIUrl":"10.1016/j.scp.2025.102011","url":null,"abstract":"<div><div>The improper treatment of waste polyester/cotton blended fabrics results in significant environmental pollution and resource wastage, and there is an urgent necessity to address the efficient treatment of waste polyester/cotton blended fabrics. The present study employs a more environmentally friendly, gentle, and energy-efficient approach to effectively separate and recycle waste polyester/cotton blended fabrics. Firstly, the waste polyester/cotton blended fabrics are swollen using acetic acid to increase the gaps of the polyester molecular chain to facilitate contact between the polyester and the depolymerization solvent. Then, the polyester of the polyester/cotton blended fabrics was efficient degraded by ethanolamine and the regenerated cotton fibers were separated after simple filtration. The effects of pretreatment condition, depolymerization temperature and time on the depolymerization efficiency of polyester under atmospheric pressure and catalyst-free conditions were investigated, and the regenerated cotton were characterized and compared with virgin cotton. Considering the comprehensive energy consumption and other factors, the optimal swelling conditions were 40 °C for 50 min. The optimal depolymerization conditions were 80 °C for 3 h, and the depolymerization rate of polyester reached 96.00 %. The chemical structure and crystal structure of regenerated cotton is comparable to that of virgin cotton, and the tensile properties are weakened by about 0.67 N. Polyester depolymerization product bis(2-hydroxyethyl)terephthalamide (BHETA) can be used as a precursor for foams and adhesives. The “polyester dissolution for cotton retention” technology enables high-added-value utilization of waste polyester/cotton blended fabrics. The wide application of this technology is of great significance to the economy, ecological and environmental protection.</div></div>","PeriodicalId":22138,"journal":{"name":"Sustainable Chemistry and Pharmacy","volume":"45 ","pages":"Article 102011"},"PeriodicalIF":5.5,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}