Sustainable Materials and Technologies
·
2024
·
IF 8.6
Sohail Yasin,Munir Hussain,Azim Uddin,Qiang Zheng,Jianfeng Shi,Yihu Song
Plastics are generally nonrecyclable materials relative to their circular production. Recycling may reduce greenhouse gases and promote decarbonization goal of plastics, while restricted due to strong incompatibility for binary or ternary polymers waste. Sustainability of sole type is frequently idealized with life cycle assessment (LCA) studies and often neglect the release of wear particulate matter or microplastics (MPs) and fail to provide alternate end-of-life (EoL) recycling solutions. Thus, this study offers recycling of binary polymer product, polyethylene terephthalate/styrene-butadiene rubber (PET/SBR) carpet and sustainability assessment through LCA with quantification of MPs accumulation. A functional unit for PET/SBR carpet in 3.5 kg weight with use phase cleaning (vacuum and detergent cleaning) for 10 years' service life was considered to simulate realistic deposition of MPs. Recycling of binary polymer carpet is utilized in high-performance rubber microfibrillar composites (MFCs), using maleic anhydride (MA) or ionic liquid (IL) compatibilizer , as a potential EoL alternative. The LCA results indicate that the use phase is the highest contributor to the environmental impacts, considering the carpet being detergent washed. Smaller MPs accumulated more in the carpet when vacuum cleaned, attracting other MPs presumably particles being statically charged. Addition of IL in recycling of binary polymer carpet not only improves the curing kinetics of MFCs but also enhances the dielectric and rheological viscoelastic behaviors compared to the conventional MA compatibilizer.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Hui Jiang,Donglei Jiang,Xinmei Liu,Jun Yang
A portable imprinted electrochemical sensor with a self-driven polyethylene terephthalate (PET) chip was developed for the fast detection of Salmonella. A chip with a siphon inlet connecting the reaction chamber and a capillary connecting the reaction chamber to the press chamber was innovatively designed to achieve self-drive. Based on siphonage and hydrophilicity , the liquid entered the reaction chamber automatically, and quantitative sampling was completed when the liquid reached the capillary. Waste liquid was discharged from the reaction chamber by pressing the press chamber. The self-driven PET electrode chip was prepared by screen-printing and laser-cutting, and Salmonella -imprinted film was then prepared on the chip working electrode via electropolymerization . Characterization studies of the modification of the working electrode were then carried out via SEM, AFM , water contact angle and electrochemistry . The detection of Salmonella was performed by differential pulse voltammetry within the range of 3.0 × 10 2 to 3.0 × 10 7 CFU mL −1 , and the limit of detection was 100 CFU mL −1 (S/N = 3). The selectivity of the proposed sensor was then examined via the use of interfering bacteria, including E. coli , L. monocytogenes, and P. aeruginosa . The practical application value of the sensor was demonstrated by a recovery rate of 92–109% and a relative standard deviation of less than 2.96% in the detection of Salmonella in milk and orange juice samples. In summary, a self-driven PET chip-based imprinted electrochemical sensor for the detection of Salmonella within 20 min was developed, and has the potential to monitor and quickly control Salmonella contamination in food processing and food circulation.
研究领域:
食品科学
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生物传感技术
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微生物学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 31
·18738-18747
·
IF 3.361
Dingyao Gao,Yinxing Miao,Siqin Ye,Chunmei Lu,Gaochao Lv,Ke Li,Chunjing Yu,Jianguo Lin,Ling Qiu
The expression level of γ-glutamyltranspeptidase (GGT) in some malignant tumors is often abnormally high, while its expression is low in normal tissues. Therefore, GGT is considered as a key biomarker for cancer diagnosis. Several GGT-targeting fluorescence probes have been designed and prepared, but their clinical applications are limited due to their shallow tissue penetration. Considering the advantages of positron emission tomography (PET) such as high sensitivity and deep tissue penetration, we designed a novel PET imaging probe for targeted monitoring of the expression of GGT in living subjects, ([18F]γ-Glu-Cys-PPG(CBT)-AmBF3)2, hereinafter referred to as ([18F]GCPA)2. The non-radioactive probe (GCPA)2 was synthesized successfully and [18F]fluorinated rapidly via the isotope exchange method. The radiotracer ([18F]GCPA)2 could be obtained within 0.5 h with the radiochemical purity over 98% and the molar activity of 10.64 ± 0.89 GBq μmol−1. It showed significant difference in cellular uptake between GGT-positive HCT116 cells and GGT-negative L929 cells (2.90 ± 0.12% vs. 1.44 ± 0.15% at 4 h, respectively). In vivo PET imaging showed that ([18F]GCPA)2 could quickly reach the maximum uptake in tumor (4.66 ± 0.79% ID g−1) within 5 min and the tumor-to-muscle uptake ratio was higher than 2.25 ± 0.08 within 30 min. Moreover, the maximum tumor uptake of the control group co-injected with the non-radioactive probe (GCPA)2 or pre-treated with the inhibitor GGsTop decreased to 3.29 ± 0.24% ID g−1 and 2.78 ± 0.32% ID g−1 at 10 min, respectively. In vitro and in vivo results demonstrate that ([18F]GCPA)2 is a potential PET probe for sensitively and specifically detecting the expression level of GGT.
研究领域:
医学影像学
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肿瘤学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Hongcai Su,Yuheng Wu,Jie Pan,Lingjun Zhu,Shurong Wang,Yanjun Hu
Mixed plastic wastes are posing substantial challenges to the environment due to their mass production and difficulty in separation, especially mixed polyvinyl chloride/polyethylene terephthalate (PVC/PET) plastic wastes. In this work, a novel tandem thermochemical process including hydrothermal depolymerization of mixed PVC/PET plastic wastes, and subsequent catalytic aqueous phase reforming (APR) of hydrolysate solution was developed. The activated carbon derived from PVC (PVC-AC) supported Ru catalysts were prepared and successfully used in the catalytic APR of hydrolysate solution for high-purity H 2 production. Besides, the presence of NaOH realized in-situ capture of CO 2 in APR process, which promoted the water-gas shift reaction and inhibited methanation reactions. As a result, a high H 2 yield of 12.23 mol/kg Plastic with H 2 concentration of ca. 98% was obtained via tandem hydrothermal conversion of mixed PVC/PET plastic wastes. The by-products from the entire tandem process including the terephthalic acid (TPA) and sodium chloride (NaCl) were separated and purified for further industrial application. This work provided a sustainable route for conversion of mixed plastic wastes into value-added fuel.
研究领域:
环境科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·7091-7095
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IF 3.288
Jialu Yang,Caixia Yin,Ying Wen,Yongbin Zhang,Fangjun Huo
As an important small gas signal molecule, H2S has become an important research hotspot for both chemists and biologists. Therefore, we designed and synthesized a benzene-conjugated coumarin connected to 2,4-dinitrobenzene via an oxygen atom (P1) to detect H2S and explored its applications in biological imaging. After 40 minutes of long-time irradiation and different pH tests, we found that P1 has good photostability and chemical stability, indicating that P1 had the ability to detect H2S accurately. In addition, P1 has a fast response speed, low detection limit and low toxicity. Based on these characteristics, P1 was used to detect H2S in live cell imaging.
研究领域:
化学
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生物学
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医学成像
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yan Mao,Shiying Fan,Xinyong Li,Jugong Shi,Mufan Wang,Zhaodong Niu,Guohua Chen
Microplastic pollution has emerged as a pressing environmental issue of global concern due to its detrimental effects on the environment and ecology. Restricted to their characters of complex composition, it is a great challenge to propose a more cost-effective approach to achieve highly selective conversion of microplastic into add-value products. Here we demonstrate an upcycling strategy for converting PET microplastics into added-value chemicals (formate, terephthalic acid and K 2 SO 4 ). PET is initially hydrolyzed in KOH solution to produce terephthalic acid and ethylene glycol , which is subsequently used as an electrolyte to produce formate at the anode. Meanwhile, the cathode undergoes hydrogen evolution reaction to produce H 2 . Preliminary techno-economic analysis suggests that this strategy has certain economic feasibility and a novel Mn 0.1 Ni 0.9 Co 2 O 4-δ rod-shaped fiber (RSFs) catalyst we synthesized can achieve high Faradaic efficiency (> 95%) at 1.42 V vs. RHE with optimistic formate productivity. The high catalytic performance can be attributed to the doping of Mn changing the electronic structure and reducing the metal-oxygen covalency of NiCo 2 O 4 , reducing the lattice oxygen oxidation in spinel oxide OER electrocatalysts . This work not only put forward an electrocatalytic strategy for PET microplastic upcycling but also guides the design of electrocatalysts with excellent performance.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Jinrui Hu,Xiao Xu,XinYi Cao,Lulu Dong,Lixia Bao,Weibo Kong,Jiliang Wang
The recycling of poly(ethylene terephthalate) (PET) is vital for environmental sustainability, yet achieving recycled PET (rPET) and its composites with optimal processability and flexibility remains a challenge. This study presents a solvent-free reactive extrusion method to extend the chains of rPET using a macromolecular chain extender (i.e., methyl methacrylate-glycidyl methacrylate copolymer, marked as PMG) rich in epoxy groups and to produce rPET/recycled polyethylene (rPET/rPE) composites. The resulting composites exhibit excellent thermoplasticity and controllable mechanical properties, such as the rPET/rPE composite (70:30 by mass), with a tensile strength of 39.2 MPa and an elongation at a break of 81.4%. After five extrusion cycles, their mechanical properties just encounter a subtle decline, indicating robust sustainability and cycle performance. The formation of a dynamic physical cross-linking network arises from the distinct polarity, hydrophobicity, and melt viscosity of rPET and rPE, where the hard spherical rPET phase is evenly dispersed in the soft rPE matrix with PMG acting as an interfacial compatibilizer. This innovative approach not only enhances the properties of the recycled composites but also promotes their cost-effectiveness and environmental benefits, thus broadening the potential applications of rPET and rPE as partial substitutes for virgin PET and PE.
研究领域:
材料科学
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环境科学
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聚合物工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 33
·50836
·
IF 3.125
Wen Zhong,Xiaobin Yang,Hongwei Gao,Yongping Bai
A series of coatings which applied for improving the oxygen barrier property of polyethylene terephthalate (PET) film were prepared based on the copolymerization of methyl methacrylate, methyl acrylate, diallyl maleate, and maleic acid (MA). The chemical structures of the coatings were characterized by Fourier Transform Infrared spectrometer. The curing behavior was analyzed by differential scanning calorimetry. The oxygen permeability (Po 2 ) was measured by gas permeability tester . The molecular weight was investigated by gel permeation chromatography (GPC). Po 2 is inversely proportional to the oxygen barrier property that the decrease of Po 2 indicates the improvement of oxygen barrier property. The coating containing inter-chain cross-linking structure formed by the dehydration of carboxylic acid improves the oxygen barrier property of PET film greatly. With the increasing content of MA, the oxygen barrier capability of coated PET film is enhanced according to the Po 2 decreasing from 1.450 to 0.8956. The Po 2 of coated PET film is minimized by selecting N -methyl pyrrolidone as solvent for polymerization. The GPC results indicate that the oxygen barrier of novel coated PET film can be obtained when the weight average molecular weight ( Mw ) is up to the stipulated value.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Deyi Zhao,Yongqi Han,Yamei Chen,Zhenyang He,Qian Xia,Ding-Kun Ji,Weihong Tan
Triple-negative breast cancer (TNBC) is one of the most malignant cancer types, characterized by a lack of efficient diagnostic and treatment methods in clinical practice. The development of effective targeted diagnosis and treatment for TNBC has become an important research focus. Here, we report the first proof-of-concept evidence of a glycoaptamer dual-target radionuclide probe (GDRP) for positron emission tomography/computed tomography (PET/CT) imaging of TNBC. The GDRP was created through precise molecular engineering of the aptamer AS1411, combined with three mannose ligands. The GDRP exhibited significantly increased serum stability and a high affinity for TNBC cells through a dual targeting mode. The advantages of our developed GDRP were further demonstrated by its excellent in vivo PET/CT dynamic imaging performance, featuring a long imaging window and high spatiotemporal resolution. This flexible method allows for the preparation of glycosylated functional nucleic acid molecular probes with high serum stability and tumor specificity. We anticipate that this PET/CT molecular probe will expand the development of glycoaptamer-based radioactive drugs and provides molecular tools for the clinical diagnosis of TNBC.
研究领域:
医学影像学
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分子生物学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Rui Wang,Xiaohong Chen,Qiuyu Li,Anying Zhang,Guocong Ma,Yanying Wei,Meiru Qu,Lu Gao,Jianfei Wei
PET-based nitrogen and phosphorus-doped Carbon Dots (NP-CDs) was prepared by solvothermal method with PET waste as raw materials. In terms of structure, NP-CDs were spherical structures with an average particle size of 2.8 nm, and its surface contains amino groups. The as-prepared NP-CDs exhibit excitation-independent emission properties from 300 nm to 430 nm, and the optimal excitation and emission wavelength was 340 nm and 460 nm. In terms of application, the as-prepared NP-CDs could be used to a pH sensor in the range of 2.3–12.3. When NP-CDs were dispersed in polyvinyl alcohol (PVA) matrix, excellent light blocking films(LBFs) for UV and blue light were obtained. When the ratio of NP-CDs is 14 %, it still does not affect the line of sight, and the barrier rate to UV(380 nm) and blue(430 nm) light is as high as 90% and 80 %. In addition, the WLED device with a colour coordinate of (0.29,0.32) and a colour temperature of 8022 K can be obtained with the combination of NP-CDs dispersed in PVA matrix and 395 nm LED chips.
研究领域:
材料科学
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环境科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Yinchun Fang,Xinhua Liu,Xuchen Tao
High flammability and dripping restrict the widely applications of PET fiber, a lot of efforts have been made to overcome these problems. In this paper, chitosan (CH) and ammonium polyphosphate (APP) were used as the intumescent flame retardant system which was constructed on PET fabrics surface via the Layer-by-layer (LBL) assembly technique. The flame retardancy and anti-dripping performance of the coated PET fabrics were determined by LOI values and vertical burning test. The results revealed that both the flame retardancy and anti-dripping performance of the LBL assembly coated PET fabrics were improved, particularly when the CH/APP bilayer was over 10 BL, the dripping phenomenon was eliminated. Alkali treatment of PET fabrics before LBL assembly effect on the flame retardancy and anti-dripping performance was investigated. The results indicated that alkali treatment of the PET fabrics would promote the combination of PET fabrics and the charged flame retardants. Thermogravimetric analysis (TGA) was used to investigate the thermal stability of uncoated and LBL assembly coated PET fabrics. The results of TGA revealed that LBL assembly coated PET fabrics would promote the char formation indicating the obviously condensed phase flame retardant action. The SEM images of the char residues revealed that LBL assembly coated PET fabrics would promote the formation of intumescent char residues with lots of microporous indicating the better anti-dripping performance.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT
·
2022
·
IF 8.816
Mengyuan Pu,Xing Zhou,Xiaohui Liu,Changqing Fang,Dong Wang
Polymers with excellent optical and mechanical performance fabricated from renewable resources, have been paid an increasing attention in recent years. Here, high-performing polyurethane elastomers with significant mechanical properties, crystallinity, excellent stretchability and good transparency are prepared by a synergistic molecular design in the soft and hard segments. Using the liquid glycolysis degradation product (LGOP) as a chain extender, polyurethane elastomer is synthesized from polyethylene terephthalate (PET) waste bottles. The results suggest that the degradation products from waste PET can be directly used as feedstock for preparing polyurethane elastomers with significant performance. The polyurethanes exhibited excellent optical transparency of near 90%, and can be stretched up to 670% without any treatment to return to original size. It is assumed that the symmetrical hard domain composed of aromatic rings and ester groups in LGOP creates sufficient chain fluidity for the dynamic exchange of hydrogen bonds and urethane. This paper has devoted to achieve a complete and mature system from waste PET to polyurethane products, to create a closed loop of waste PET plastic recycling and regeneration, and to realize the polyurethane industrial chain of raw material self-supply.
研究领域:
材料科学
·
可持续发展
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）