CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Zehong Wang,Wei Wang,Dan Yu
Thanks to the booming development of wearable electronics, finding a facile approach to integrate electronics to textiles becomes attractive. However, many disadvantages such as trivial fabrication steps, limitations of textile substrate types and unavoidable damage to textiles’ natural properties, have hampered the development of wearable electronics. In this work, pressure responsive PET fabrics were produced through a facile fabrication of conductive PET fabrics. Firstly, fine conductive adhesives (CA) with good printing performance were prepared by utilizing alcohols-assisted dispersion to prevent Ag NPs’ aggregation tendency in waterborne polyurethane (WPU). Then, screen printing on PET fabrics and subsequently treated with solvent system that consisted diallyldimethylammonium chloride (DADMAC), dichloromethane (DCM) and ethanol to construct conductive wrinkles at room temperature. With the help of WPU’s swelling, the conductive path was generated by Ag NPs spontaneous aggregation and the as-prepared conductive PET fabrics demonstrated outstanding electric conductivity (0.01 Ω·m). Finally a simple self-assembly PET fabrics pressure sensor based on the conductive PET fabrics exhibited superior performance, including the synchronous response to thumb pressing (frequency was 0.5 Hz), precisely distinction current of different weights, decent bending stability, fast response (63 ms) and relaxation time (23 ms), simultaneously possessing advantages of low cost and facile fabrication process. Based on its superior performance, the PET fabric sensor was developed to monitor the human fist behavior at different frequency (0.25 Hz and 1 Hz) and its good real-time response current, meeting the potential application requirements in wearable electronics and “smart textiles” for monitoring human’s movement behavior.
研究领域:
材料科学
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纺织工程
·
电子工程
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DOI
高影响因子
CATALYSIS TODAY
·
2024
·
IF 5.2
Lin Gao,Zixian Jia,Lijiao Qin,Haocheng Sun,Xinwei Zhang,Baozhong Li,Xuehai Wang,Jiquan Liu,Jinbo Bai
The recovery of Zn/ZnO nanoparticles from spent alkaline batteries was studied. This catalyst was employed for glycolysis of polyethylene terephthalate (PET) to produce bis(2-hydroxyethyl) terephthalate (BHET). The reaction temperature, catalyst/PET ratio and reaction time were investigated. Under the optimal conditions of 190 ℃ and 2 hours, with a catalyst/PET ratio of 2 %, the PET conversion rate and BHET yield of this process were 99 % and 81 %, respectively. The experimental results show that the catalyst exhibits high catalytic activity, is easy to separate, and has good reusability. In addition, this catalyst can deal effectively with impurities and dyes present in waste PET. Finally glycolysis kinetic studies were conducted on the reaction of PET degradation, and the activation energy of 118.8 kJ·mol −1 were obtained.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Minglei Li,Yaheng Zhang,Jie Zhang,Min Peng,Liuming Yan,Zhiyong Tang,Qing Wu
Gas–liquid–solid (G–L–S) three-phase slug flow provides an efficient pathway to utilize solid catalysts in continuous flow and was adopted in the mesoporous graphite carbon nitride (mpg-C3N4)-catalyzed photoinduced electron/energy transfer reversible addition–fragmentation chain transfer (PET-RAFT) polymerization of methyl methacrylate (MMA) in this work. Kinetic studies and chain extension experiments illustrated the realization of reversible deactivation radical polymerization (RDRP) and the “easy to scale up” advantage of a continuous-flow reactor as compared to its batch counterpart. The light intensity played an important role on the PET-RAFT polymerization. An increasing amount of photocatalyst favored the monomer conversion within a limited range due to higher light blockage, and the monomer conversion reached a stable level at a lower catalyst concentration when higher light power was applied. When compared with fully continuous flow, the G–L–S slug flow was beneficial to the PET-RAFT polymerization due to the intensified swirling strength and narrower velocity field. Decreasing the gas-to-slurry ratio also led to narrower velocity distribution, which favored the polymerization as well. Moreover, the polymerization rates remained stable in multiple recycles, demonstrating that the present G–L–S slug flow was a reliable and easy processing approach for utilizing the solid catalyst.
研究领域:
化学工程
·
高分子化学
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催化科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 9
·4337-4345
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IF 3.3
Zhangbin Liao,Yunlong Duan,Liying Guo,Rongrong Zheng,Liyan Wang,Yanming Chen,Linnan Zhang,Xin Qian
Five titanium-centered heteropoly acids with different metal vacancies were prepared first, and then combined with an ionic liquid by ion exchange to prepare heteropoly acid ionic liquid catalysts Bmim4–6[M(H2O)TiMo11O39] (M = Cu2+, Fe2+, Pb2+, Ti4+, and Zn2+). The structure and thermal properties of each catalyst were tested and analyzed by Fourier transform infrared (FTIR) spectroscopy, ultraviolet (UV) spectroscopy, X-ray powder diffraction (XRD), apparent morphology analysis, and thermogravimetric analysis (TGA). Five heteropoly acid ionic liquids were investigated by using waste mineral water bottles as samples for performance in the catalytic degradation of bottle-grade polyethylene terephthalate (PET), and the degradation product, bis(2-hydroxyethyl) terephthalate (BHET), was analyzed for the chemical structure. The results showed that the five heteropoly acid ionic liquid catalysts were successfully prepared, with good thermal stability. Of these catalysts, Bmim4[Ti(H2O)TiMo11O39] showed the optimal catalytic performance. It achieved an alcoholysis rate of 100% and a yield of BHET of 84.73% with a catalyst dosage of 0.6% (percentage in the total mass of the raw materials) at 190 °C for 5 h. Moreover, after six cycles of use, the alcoholysis rate was still as high as 94.36%, and the yield of BHET was 75.65%. The above results indicated that the prepared heteropoly acid ionic liquid catalysts showed good performance in the catalytic degradation of bottle-grade PET, presenting a promising prospect for development.
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Surfaces
·
2024
·Vol. 7
·期 2
·225-237
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IF 2.3
Xinghua Wu,Zhaokang Han,Yuchao Wang,Yutong Pan,Xiaohua Jie
Superhydrophobic coating is widely used due to its waterproof and self-cleaning properties. Carbon soot (CS) nanoparticles are naturally superhydrophobic and non-toxic which are superior to other superhydrophobic coating. However, the weak binding force of the CS nanoparticle layers hinders their practical application. In this study, micro-nanostructured PET-CS superhydrophobic coatings were prepared by a simple method. The obtained coatings presented durable superhydrophobicity and underwater stability, which are superior to PDMS-CS coatings and CS layers. The coating surfaces demonstrated superhydrophobicity under a water pressure of 13.72 kPa for up to 16 days. The surface could withstand water flush for more than 15 min. The coatings also demonstrated good mechanical stability and maintained superhydrophobicity after an abrasion length of 8 m. The stable long-lasting underwater superhydrophobic surface is of great importance for marine applications.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
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IF 7.7
Yanyou Huang,Liangdong Ye,Qiaoyan Wei,Dacheng Li,Zengju Wu,Liling Zhang,Chuanheng Yu,Ziwei Li,Shaorong Lu
Improving the toughness of epoxy resins is critical for high-performance applications. In this study from molecular structure design, hyperbranched ionic liquids (HBIL) containing imidazole groups were synthesized through a one-step esterification method. These HBIL were subsequently combined with recycled polyethylene terephthalate (PET) to synergistically enhance the toughness of epoxy resins (EP). The mechanical, thermomechanical, and rheological properties, as well as the curing behavior of the epoxy composites, were systematically evaluated. The addition of HBIL reduced the viscosity and curing temperature of the epoxy composite. The impact strength of the epoxy composites with only 6 phr PET was increased from 6.48 kJ/m 2 to 18.19 kJ/m 2 . Furthermore, the addition of HBIL exhibited a synergistic effect with PET. The epoxy composites added with 6 phr PET and 4 phr HBIL showed an increase in impact strength, elastic modulus, and flexural modulus by 237 %, 28.5 %, and 12.4 %, respectively, and an increase in the glass transition temperature (T g ) by 5.8 °C compared with pure EP. Molecular dynamics (MD) simulations corroborated these experimental results, providing insight into the improved properties. This study introduces an innovative approach to developing epoxy composites with superior performance characteristics.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
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IF 4.7
Yubo Ren,Shuaijie Li,Jingjun Dong,Zhihui Zhao,Zunyuan Wang,Guoxin Wang,Xiaoming Li,Weichao Chen
The urgent need for efficient wound dressing requires comfortability, reasonable humidity, and anti-inflammatory and pathogen anti-infectivity properties. Herein, the PET micronanofiber pads loaded with forsythin (FT) are successfully designed and prepared by electrospinning. The asymmetric wettability double-layer micronanofiber pad (PET@FT10%/PET) has been developed by utilizing the hydrophobic properties of PET. The addition of FT endows super hydrophobic PET with excellent hydrophilic properties and absorbent properties to ensure the dryness of the wound environment. Meanwhile, the hydrophobic PET layer avoids the adhesion of dust and bacteria, providing a barrier to prevent pollution of the complex external environment for the drug-carrying layer. Furthermore, the PET@FT10%/PET double-layer micronanofiber pad provides favorable conditions for wound healing with the validation by inhibition of representative pathogens Escherichia coli and Staphylococcus aureus, and the expression of pro-inflammatory factors (IL-6 and TNF-α), and the cell survival rate also achieved excellent results. Therefore, the PET@FT10%/PET double-layer micronanofiber pad designed in this paper provides a neoteric strategy with an asymmetric structure design to avoid contamination and accelerate drug delivery for wound healing.
研究领域:
生物医学工程
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材料科学
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药理学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Chengmin Hou,Ying Zhang,Qi Gui
With the advancement of science and technology, the problem of wastewater pollution is escalating and there is an urgent need to focus on wastewater treatment. After the bromination reaction of Polyethylene terephthalate (PET) as an adsorption substrate (It is used to remove heavy metal ions), PET-g-PAA adsorption material was synthesized through the grafting polymerization of PET with poly(acrylic acid) (PAA) derived from the free radical polymerization of acrylic monomer. The intricate structure of the composite material was meticulously analyzed using a range of sophisticated techniques. The optimum polymerization and adsorption conditions of PET- g -PAA for Cu(II) under different conditions were investigated. The optimum polymerization conditions were 1.0 g polymer mass, 2 h polymerization time, 50 °C reaction temperature and 1 cm × 1 cm PET fiber cloth. Under conditions where the Cu(II) solution concentration was 20.48 mg/L and the adsorption process occurred at 50 °C, the peak adsorption efficiency of PET-g-PAA reached 83.70 %, accompanied by an optimal adsorption capacity of 16.85 mg/g. The adsorption curves of PET- g -PAA on Cu(II) fitted well with the pseudo-second-order kinetic model and Freundlich isotherm model, indicating that the adsorption process belongs to chemisorption. Moreover, the initial adsorption rate (h = 20.16 mg/g·min) is larger, indicating that the adsorption rate of PET-g-PAA is faster. The adsorbent belongs to multilayer adsorption on a multiphase surface. The heterogeneity factor was greater than 2 and less than 10, which proved that the adsorption process of adsorbent was favorable. On the basis of adsorption thermodynamics, Δ G 0 < 0 kJ/mol, Δ S 0 = 39.82 kJ·mol −1 ·K −1 , ΔH 0 = 8.36kJ/mol, indicating that the adsorption of Cu(II) by PET- g -PAA was a spontaneous endothermic and favorable process. The PET-g-PAA adsorbent achieving exceptional heavy-metal removal efficiency, enhanced reusability, and cost-effectiveness for sustainable wastewater remediation—a significant advancement over conventional single-use or non-scalable adsorbents.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Zaichao Guo,Yujing Wang,Zhihao Liang,Zhenhua Zhang,Jianjun Xie,Xiaoyu Gui,Borui Hou,Dan Mo,Liang Lu,Huijun Yao
Due to the increase in oil spills and the high organic contamination of the marine environment, it is necessary to develop an oil/water separation technology with low cost and high efficiency. Membrane separation technology has been proven to be an important technology used in the oil/water separation area. Herein, PET ion track-etched membranes with channel sizes of 310 nm, 650 nm, 1050 nm, and 1950 nm were hydrophobically modified by chemical grafting using propyltrichlorosilane and o-xylene as modifier and solvent, respectively. The modified PET ion track-etched membranes were found to exhibit a maximum water contact angle of 140.81° and possessed excellent hydrophobic property with modifying conditions of 80 mM modifier and 24 h modification time. It demonstrated the grafted propyl groups on the PET ion track-etched membrane played a key role in the increase of hydrophobic property. After modification, the PET ion track etched membrane had a high oil/water separation ratio of 99.87% and a flux of 12,158.24 L/m 2 ·h with good running stability. This work provided a cost-effective and facile approach to distinctly improve the ion track-etched membrane performance on durable oil/water separation.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 8
·1917
·
IF 5
Siheng Zhao,Bo Xu,Hao Shan,Qinglei Zhang,Xiangdong Wang
This work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized. The combustion behaviors of flame-retardant PET were studied and the structure–property relationships between the phosphorus-based structures with different valence states and flame-retardant properties were further explored. It was found that phosphorus valence states significantly affected the flame-retardant modes of action of polyphosphate in PET. For the phosphorus structures with +3-valence, more phosphorus-containing fragments were released in the gas phase, inhibiting polymer chain decomposition reactions; by contrast, those with +5-valence phosphorus retained more P in the condensed phase, promoting the formation of more P-rich char layers. It is worth noting that the polyphosphate containing both +3/+5-valence phosphorous tended to combine the advantage of phosphorus structures with two valence states and balance the flame-retardant effect in the gas phase and condensed phase. These results contribute to guiding the design of specified phosphorus-based structures of flame-retardant compounds in polymer materials.Keywords:polyethylene terephthalate (PET);flame retardant;valence states;phosphate
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Leqing He,Shuangbai Li,Chongpin Huang
In the context of composite materials that elude classification via conventional pretreatment methodologies such as crushing, granulating, and flotation—specifically within the domains of food packaging, construction materials, and engineering plastics—this research employed a one-step methanolysis-separation technique for the graded recycling of polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET) in mixed plastics. Employing methanol as the reaction solvent, the benign and eco-friendly ionic liquid BMIMOH as the catalyst for the degradation of PET. PET was methanolized to produce dimethyl terephthalate (DMT), while PP and PE remained highly stable, were separated after the reaction, and subjected to subsequent recycling. The stability of PP and PE under methanolysis conditions was revealed through structural and thermodynamic analyses. Single-factor analysis and response surface methodology were employed to determine the optimal conditions for the methanolysis reaction. Additionally, the impact of different contents of PP and PE on the recovery of PET from the mixed plastics during the swelling-condensation process at high temperatures was explored. Under the optimal conditions, the yield of DMT was 94 % for the degradation of single PET, and when the ratio of PET in the mixed plastics was 50 %, the yield of DMT could still reach 90 %.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 48
·33917-33925
·
IF 10.7
Yi Ma,Luming Li,Jialing Tang,Zongkun Hu,Yong Zhang,Huan Ge,Ning Jian,Jun Zhao,Andreu Cabot,Junshan Li
Plastics have become an integral part of modern society due to their excellent mechanical properties, light weight, chemical stability and low cost. However, their continuous production and use worldwide have resulted in a major environmental problem. In this context, the green degradation and upcycling of waste plastics using electrochemical oxidation present a promising solution. To make this solution practical, the development of cost-effective catalysts optimized for this reaction is essential. In this study, we propose a new catalyst for the electrocatalytic reforming of ethylene glycol (EG) derived from polyethylene terephthalate (PET) to formic acid. The catalyst comprises layered Ni–Co9S8 nanosheet arrays (NSAs) grown on nickel foam (NF) via the hydrothermal method. Under EG oxidation reaction (EGOR) conditions, the Ni–Co9S8 NSAs/NF catalyst achieves Faraday efficiencies (FEs) of up to 92%. Additionally, the direct use of commercial PET plastic powder hydrolysate still enables formate FEs to exceed 90%. These outstanding results are rationalized using density functional theory (DFT) calculations providing insights into the role of the different elements in the EGOR. Overall, this study demonstrates both a synthetic strategy for transition metal sulfides and an efficient and sustainable strategy for the upgraded recycling of PET plastics.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）