CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Ai Liu,Yali Liu,Yingying Li,Xueli Wang,Jianyong Yu,Ruiyun Zhang,Faxue Li,Ruchao Yuan
The preparation of 100 % recycled PET copolymers, as well as their corresponding fibers and fabrics with low-temperature dyeability, is essential for reducing environmental impact and enhancing energy conservation. However, it remains a significant challenge to prepare 100 % recycled PET that simultaneously exhibits excellent mechanical strength and low-temperature dyeability. In this study, this issue was addressed by incorporating polyester diols (Pedol), a PET decomposition product, into the PET macromolecular chain to retain a high molecular weight in the resulting copolymer. The synthesized Pedol-modified PET (PEDT n ) demonstrated good mechanical strength and hydrophilicity. Notably, filaments derived from PEDT 10 , containing 10 wt% Pedol, exhibited superior mechanical and hydrophilic properties compared to conventional PET. Moreover, PEDT 10 fabrics achieved satisfactory dyeing performance without the use of carriers under low-temperature and atmospheric-pressure conditions, highlighting their strong potential for sustainable industrial-scale textile applications.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2020
·Vol. 20
·期 4
·2045-2054
·
IF 1.134
Hao Xiao-Liang,Pan Xiao-Hua,Gao Yun,Wang Yong,Guo Jing,Teng Ying-Xue
In this work, green-emission carbon dots (CDs) were prepared for detecting mercury ions (Hg(II)) and iodine ions via a facile hydrothermal method using ethylenediamine and methyl red as nitrogen and carbon sources, respectively, without any other complex reagents. The bacteriostasis
experiment showed that the CDs were not toxic to the growth of four kinds of bacteria: Staphylococcus aureus (S. aureus), Bacillus subtilis (B. subtilis), Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), which indicated that the CDs had good security and could be
used for analysis and detection. The CDs exhibited excitation-independent emission, the fluorescence of which could be quenched by Hg(II), and could be recovered by iodine ions. An approach was established to detect Hg(II) based on the fluorescence quenching of CDs by the synergistic action
of a photo induced electron transfer (PET) mechanism, and iodine ions were detected based on the fluorescence recovery of CDs by a HgI2 precipitate formation mechanism. The detection limits for Hg(II) and iodine reached 0.89 μM and 0.50 μM, respectively. Compared
to most methods, the method mentioned in this paper has good selectivity, a wider linear range, a lower detection limit and higher security. The synthesized CDs could be probes for sensing Hg(II) and iodine ions.
研究领域:
分析化学
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材料科学
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环境科学
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ACS Biomaterials Science & Engineering
·
2021
·
IF 4.749
Pengfei Zhang,Jiyu Li,Mei Yang,Lifei Huang,Fanqiang Bu,Zixu Xie,Guofeng Li,Xing Wang
Antimicrobial modification of poly(ethylene terephthalate) (PET) is effective in preventing the adhesion and growth of microorganisms on its surface. However, few methods are available to modify PET directly at its backbone to impart the antimicrobial effect. Herein, menthoxytriazine-modified PET (PMETM) based on the stereochemical antimicrobial strategy was reported. This novel PET was prepared by inserting menthoxytriazine into the PET backbone. The antibacterial adhesion test and the antifungal landing test were employed to confirm the antiadhesion ability of PMETM. PMETM could effectively inhibit the adhesion of bacteria, with inhibition ratios of 99.9 and 99.7% against Escherichia coli (Gram-negative) and Bacillus subtilis (Gram-positive), respectively. In addition, PMETM exhibited excellent resistance to Aspergillus niger (fungal) contamination for more than 30 days. Cytotoxicity assays indicated that PMETM was a noncytotoxic material. These results suggested that the insertion of menthoxytriazine in the PET backbone was a promising strategy to confer antimicrobial properties to PET.
研究领域:
材料科学
·
生物医学工程
·
微生物学
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AATCC Journal of Research
·
2025
·
IF 1.2
Yanxia Xie,Weiqiang Zhang,Yaning Xu,Shuhan Zhao,Wenxuan Yin,Wenqiang Zhang,Xu Han,Hongmei Zuo,Lihua Zou
Polyethylene terephthalate (PET) fibers have been widely used in various industrial fields due to their excellent chemical and physical performance. However, there is still a crucial problem of the massive precipitation of oligomers from the interior to the surface of product, which results in decreased production efficiency and harm to human health. A quantitative characterization method for surface oligomers of PET fibers based on Soxhlet extraction was developed, with lower-temperature extraction, high accuracy, excellent extraction effect and wider operability. The extraction temperature (Toe) decreased by 30°C compared to the conventional extractant of tetrachloroethylene (Te-Ex), benefiting from the trichloroethylene (Tr-Ex) extractant. The pre-wash process with trichloroethylene could ideally remove oil impurities of about 0.09% but retain the surface oligomers on the fibers, endowing the method of with promising accuracy. PET staple fibers with various contents of surface oligomers were extracted with Tr-Ex, and the achieved contents (i.e. 0.320%/0.527%/0.876%) were similar to those with Te-Ex (i.e. 0.307%/0.516%/0.828%), and the contents with Tr-Ex were all slightly higher than those with Te-Ex, indicating that the extraction efficiency of Tr-Ex improved by ∼4.10% compared with that of Te-Ex. It was confirmed that Tr-Ex method has excellent accuracy compared with as the Te-Ex method and better extraction effect than the Te-Ex method; maybe possibly dipole–dipole interaction between trichloroethylene and oligomer molecules was responsible for the better effect. This quantitative characterization method has potential application in industrial online measurement of surface oligomers on PET fibers, films and related materials.
研究领域:
高分子科学
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材料工程
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分析化学
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工业化学
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Journal of Water Process Engineering
·
2026
·
IF 6.7
Xiao Liu,Runze He,Jiachen Song,Xinyu Hou,Fei Wang
With the growing severity of environmental pollution, the treatment of organic wastewater and waste plastic bottles has become global concerns. This study explored the feasibility of synthesizing metal-organic composite catalysts using waste PET plastic by a microwave one-step synthesis process with only 4 h. Comprehensive characterizations confirmed that the bimetallic Cu/Mn-PET catalyst outperformed monometallic counterparts and pure BDC-derived catalysts, featuring a more regular polyhedral morphology, good crystallinity and excellent stability. XPS valence state analysis uncovered pronounced synergistic interactions between Cu and Mn. Notably, despite a relatively low specific surface area (11.75 m 2 /g), Cu/Mn-PET featured the highest active site density and exhibited minimal interfacial charge transfer resistance in electrochemical measurements. When combined with PMS-AOPs technology, Cu/Mn-PET achieved nearly 100% degradation efficiency for various pollutants (dyes, antibiotics, phenolic compounds) under optimized conditions, accompanied by substantial mineralization (TOC removal rates above 56.36%). Additionally, the Cu/Mn-PET catalyst also showed strong recyclability with low metal leaching concentrations, as well as good salt tolerance. Furthermore, it was proved that the catalytic mechanism of Cu/Mn-PET involved the combined action of free radical reactions and non-free radical reactions, but the non-free radical based 1 O 2 played a dominant role. Thus, a green and efficient PET microwave one-step conversion technology has been developed to prepare a bimetallic organic composite catalyst with high catalytic activity and stability successfully, which hold significant implications for environmental protection and resource utilization.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2021
·
IF 5.268
Lijuan Wang,Xuanxuan Xin,Pengfei Li,Jie Dou,Xiao Han,Jian Shen,Jiang Yuan
Gold nanoparticles(AuNPs) are capable to catalyze the nitric oxide (NO) generation from endogenous and exogenous donors, thereby promoting re-endothelialization and inhibiting intimal hyperplasia and thrombosis. Herein, keratin-dopamine conjugates were synthesized and then immobilized on the surface of the pre-aminolyzed poly(ethylene terephthalate) (PET) via self-polymerization of dopamine residue, following by the formation of AuNPs in situ without extra reductant. The modified PET sheets(PET-AuNPs) could promote the growth of HUVECs while inhibit the proliferation of HUASMCs due to their catalytic generation of NO from GSNO. In addition, these sheets exhibited antibacterial properties and good blood compatibility without hemolysis. Taken together, this strategy for designing prosthetic vascular grafts to treat cardiovascular diseases has great potential.
研究领域:
生物医学工程
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材料科学
·
心血管疾病研究
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ENERGY
·
2026
·
IF 10.1
Zhiwen Wang,Yi Li,Linwen Wang,Chunhong Chen,Qing Zhou,Dongxia Yan,Junli Xu,Jiayu Xin,Xingmei Lu
A novel Polyethylene terephthalate (PET) steam pyrolysis method is developed by introducing high H/C ratio gas to produce terephthalic acid (TPA) monomer. CH 4 , C 2 H 6 , C 2 H 4 , C 3 H 8 , and C 3 H 6 were used as external hydrogen donors to upgrade the waste PET steam pyrolysis process, which were proven to be effective. Under optimized conditions (H 2 O flow rate of 0.1 mL/min, C 3 H 8 flow rate of 2 mL/min, heating rate of 0.5 °C/min, and final pyrolysis temperature of 450 °C), the H 2 O/C 3 H 8 /N 2 system achieved a product yield increase from 32.69% to 93.15% and a TPA purity improvement from 26.57% to 90.73%, with complete elimination of coke residues. Isotope tracing experiments using D 2 O confirmed the dual roles of H 2 O in hydroxyl substitution and hydrogen transfer, with C 3 H 8 compensating for hydrogen deficiency from H 2 O and enhancing the hydrogen transfer pathway. Through DFT calculations, the pathways and mechanisms of PET steam pyrolysis using C 3 H 8 as an external hydrogen donor were proposed, demonstrating that H 2 O and C 3 H 8 synergistically mediate the oriented pyrolysis of PET toward TPA by supplying ·OH and ·H radicals. This method offers a new idea for directional pyrolysis to prepare monomers, which is of great significance for achieving the recycling of waste plastics.
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NUCLEAR MEDICINE AND BIOLOGY
·
2022
·
IF 2.947
Hongliang Wang,Liu Yang,Keyi Lu,Xiaoshan Guo,Rui Xi,Weixuan Dong,Kaixin Qin,Haiyan Liu,Hua Wei,Yan Cheng,Zhifang Wu,Sijin Li
Objective Given the limitation of biomarkers to predict the renal function progression in diabetic nephropathy , N-(6-[ 18 F]Fluoropyridin-3-yl)glycine (6-[ 18 F]FPyGly) was used to evaluate renal function progression in a rat model of diabetic nephropathy. Methods Twenty male Sprague-Dawley rats were randomly divided into four groups, including the healthy control group (HC group), diabetic nephropathy group (DNM group), routine diet treated diabetic nephropathy group (RDNM group), and high fat/high sucrose -diet-fed diabetic nephropathy group (HDNM group). All renal function parameters were determined from animal PET renograms . P and T max represent the curve peak counts and the time to the curve peak counts of 6-[ 18 F]FPyGly in kidneys after injection, C 1/2 and the 15 min/Peak ratio represent the time from peak to 1/2 peak in the clearance phase, and the ratio of the curve counts at 15 min to the curve peak counts. Results P, T max , C 1/2 , and 15 min/peak ratio of each rat were significantly correlated with S-Cr, BUN . There were significant differences in T max , P, serum creatinine (S Cr), and blood urea nitrogen (BUN) levels between HC and DNM groups. P and the 15 min/Peak ratio were significantly different among DNM, RDNM, and HDNM groups, while T max and C 1/2 were only significantly different between DNM and RDNM or HDNM groups. There only was a significant difference in BUN between the DNM and HDNM groups. Conclusion The renal function parameters P, T max , C 1/2 and 15 min/peak value obtained by dynamic renal imaging based on 6-[ 18 F]FPyGly could reflect changes of renal function in rats, which had a good correlation with S Cr and BUN, and showed more efficient in the diagnosis of diabetic nephropathy and renal function classification than S Cr and BUN.
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CHEMOSPHERE
·
2023
·
IF 8.8
Shuhui Wei,Ali Reza Kamali
A nanostructured core-shell composite (Ni 0·4 Fe 2·6 O 4 /(Fe,Ni)@carbon, NFC) comprising magnetic nano-cores encapsulated with graphitic shells (≈80 wt%) is prepared by facile and clean mechanochemical-molten salt processing approach using waste PET ; providing a specific surface area of 201.9 m 2 g −1 , well-developed mesopores, and ferromagnetic behavior characterized by the coercivity value of 149 Oe. NFC is utilized as a high-performance adsorbent for the removal of organic dyes from their aqueous solutions. Moreover, the magnetic performance of NFC enables the facile collection of the exhausted adsorbent out of the purified water. Performances of NFC for the removal of crystal violet dye (CV), methyl orange (MO) and rhodamine B (Rh B) from their aqueous solutions are systematically investigated under different environmental conditions including the adsorbent dosage and dye concentration, as well as the solution pH and temperature, where an impressive CV removal capacity of 201.6–243.8 mg g −1 is recorded for a wide pH range of 2–10. Mechanism and kinetics involved in the adsorption process are investigated by studying the adsorption isotherms and thermodynamics. The dye adsorption of the nanocomposite material is confirmed to follow the pseudo-second-order kinetic model combined with the Langmuir isotherm model, exhibiting an excellent spontaneous and exothermic monolayer adsorption capacity of around 153 mg g −1 (for MO) for the fresh adsorbent and around 89 mg g −1 after three adsorption-regeneration cycles.
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LASER PHYSICS LETTERS
·
2018
·Vol. 15
·期 5
·055701
·
IF 2.235
Xi Liu,Meizhen Huang,Jie Chen,Lili Kong,Keihui Wang
A simple method, based on a roll-to-roll ultraviolet micro-pyramid imprinting technique and a nanoparticle self-assembling process in aqueous solution, to fabricate a large-area, flexible surface-enhanced Raman scattering (SERS) polyethylene glycol terephthalate substrate is proposed. The SERS substrate is demonstrated to be of high sensitivity. The detection concentration of Rhodamine 6G (R6G) measured by a portable Raman spectrometer is down to 10−9 mol l−1. The relative standard deviation values of different spots and different substrates are less than 13%. In addition, the feasibility for rapid detection of dye in herbal tea based on this SERS substrate and a portable Raman spectrometer is investigated. Three industrial dyes are employed to simulate the dyeing process. It is presented that R6G of 4.8\times {{10}^{-7}} g ml−1, malachite green of 10−6 g ml−1 and Auramine O of 10−6 g ml−1 in herbal tea could be detected rapidly. The experimental results imply that this method could be potentially applied in the field of dyed herbal tea detection.
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POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Bo Xu,Meng Jia,Dong Wang,Siheng Zhao,Shouao Zhu,Lijun Qian
Four polyphosphate/polyphosphonate flame retardants (PAP, POP, PAP-UB and POP-UB) have been designed and synthesized to study the effects of phosphorus valence states and the presence of unsaturated carbon-carbon double bonds on self-cross-linking impacting flame-retardant modes of action. It was found that phosphorus valence states affect the proportion of flame-retardant activity between the gas phase and condensed phase. A phosphonate containing +3-valence phosphorus is primarily effective as a gas-phase flame-retardant, while the one containing +5-valence phosphorus mainly exerted an impact in the condensed phase. The introduction of an unsaturated bond enhances the carbon-forming effect promoted by polyphosphates/polyphosphonates in a degrading polymer matrix and increases the melt viscosity for blends at high temperature. The phosphorus-containing fragments which might have been released into the gas phase are locked in the condensed phase due to C C bonds cross-linking, thus forming more high-quality phosphorus-rich char layers. This effect balances the distribution of gas-phase and condense-phase flame-retardant effects and is especially obvious in PET/polyphosphonate blends containing +3-valence phosphorus, which originally plays mainly the role of a gas-phase flame retardant . PET blends containing unsaturated carbon-carbon double bonds display better carbon formation, flame-retardant activity and anti-dripping behavior than these do without this feature.
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POLYMER
·
2015
·
IF 3.562
De-Ming Guo,Teng Fu,Chao Ruan,Xiu-Li Wang,Li Chen,Yu-Zhong Wang
In order to avoid the serious melt-dripping problems caused by conventional phosphorus flame retardants , a new arylene-ether containing monomer named 2,2′-(4,4′-(1,4-phenylenebis(oxy))bis(4,1-phenylene))bis(oxy) diethanol (PBPBD) was synthesized and introduced into the PET main-chain via condensation polymerization. With the incorporation of arylene-ether units, the thermal stability and the char residue from combustion of flame-retardant-element-free copolyesters containing PBPBD (BD x PETs) increased dramatically. However, the crystallinity and melting temperature of these copolymers were lower than the same quantities for PET. Thermal degradation kinetic was investigated using the Ozawa-Flynn-Wall method, which illustrated that the apparent activation energy for decomposition of the copolyesters was enhanced with increasing the conversion and the content of PBPBD. Py-GC/MS results showed that the PBBPD structural units undergo rearrangement reactions at high temperature, and ultimately form conjugated heteroaromatic structures, which lead to the formation of stable char residues with unique “stick-shaped” micro-morphology. Due to these rearrangement reactions, BD x PETs showed an expected flame retardant performance and a reduction in smoke generation during combustion. For example, the LOI value for BD 10 PET was 28.4, and the total smoke production (TSP) was 10.4 m 2 , much smaller than that for PET, 18.8 m 2 . Moreover, melt-dripping was restricted.
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