Plants-Basel
·
2023
·Vol. 12
·期 12
·2296
·
IF 4.5
Ying Qi,Lingling Ma,Muhammad Imran Ghani,Qiang Peng,Ruidong Fan,Xiaojing Hu,Xiaoyulong Chen
Passion fruit is known to be sensitive to drought, and in order to study the physiological and biochemical changes that occur in passion fruit seedlings under drought stress, a hypertonic polyethylene glycol (PEG) solution (5%, 10%, 15%, and 20%) was used to simulate drought stress in passion fruit seedlings. We explored the physiological changes in passion fruit seedlings under drought stress induced by PEG to elucidate their response to drought stress and provide a theoretical basis for drought-resistant cultivation of passion fruit seedlings. The results show that drought stress induced by PEG had a significant effect on the growth and physiological indices of passion fruit. Drought stress significantly decreased fresh weight, chlorophyll content, and root vitality. Conversely, the contents of soluble protein (SP), proline (Pro), and malondialdehyde (MDA) increased gradually with the increasing PEG concentration and prolonged stress duration. After nine days, the SP, Pro and MDA contents were higher in passion fruit leaves and roots under 20% PEG treatments compared with the control. Additionally, with the increase in drought time, the activities of antioxidant enzymes such as peroxidase (POD), superoxide dismutase (SOD) and catalase (CAT) showed an increasing trend and then a decreasing trend, and they reached the highest value at the sixth day of drought stress. After rehydration, SP, Pro and MDA contents in the leaves and roots of passion fruit seedlings was reduced. Among all the stress treatments, 20% PEG had the most significant effect on passion fruit seedlings. Therefore, our study demonstrated sensitive concentrations of PEG to simulate drought stress on passion fruit and revealed the physiological adaptability of passion fruit to drought stress.Keywords:Passiflora edulisSims;drought stress;hypertonic polyethylene glycol;physiological characteristics
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Journal of Coatings Technology and Research
·
2020
·Vol. 17
·期 4
·865-874
·
IF 1.815
Yao Jinghua,Dai Zhengwei,Yi Jie,Yu Hongliang,Wu Bo,Dai Leyang
Marine antifouling coatings require superior mechanical properties and effective antifouling. Degradable polyurethane (PU) coatings have a reputation for high performance. Degradable PU films were prepared by mixing triblock polyols [composed of polyether (polypropylene glycol or polyethylene glycol) and ε-caprolactone] and crosslinker agent (tolylene diisocyanate trimer). The hydrolytic degradation and water absorption experiments of PU films demonstrated that the PU films could erode in artificial sea water, which were mainly controlled by the hydrophilic property of the polyether. Marine field test revealed that degradable polyurethane had excellent efficiency in preventing biofouling for more than 9 months.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Yingmin Yu,Fangyu Zhang,Xiaocheng Zhang
The liquid–liquid equilibrium (LLE) data for the ternary systems of {n-octanol + ethylene glycol + solvents (water/n-heptane/n-hexane/1-hexene/1-chlorobutane)} at 298.2 K under 101.3 kPa were determined. The solute distribution constant and selectivity were used to analyze the solvent’s extraction ability. Meanwhile, the NRTL and UNIQUAC models were applied to correlate the experimental LLE data, and the binary interaction parameters were obtained. The root mean square deviation (RMSD) between the experimental data measured and the calculated by the NRTL and UNIQUAC models was less than 3%. The binary interaction parameters have been confirmed by GUI-MATLAB.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wei Liu,Bo Wang,Haifeng Dong,Mengyu Ren,Zongxu Wang,Dan Li,Yi Nie,Xiangping Zhang
Efficient CO₂/CH₄ separation is crucial for the value-added utilization of natural gas, shale gas, and biomethane. This work developed a series of tetramethylammonium-based ionic liquids (ILs) containing ethylene glycol (EG) as high-performance absorbents. Among them, the [N₁₁₁₁][1,2,4-Tz]/EG (1:1) system exhibited a high CO₂ capacity of 0.205 g/g at 40 °C and 100 kPa, together with exceptional CO₂/CH₄ selectivity (574). The separation performance was finely tuned by varying the EG content, which regulated the hydrogen-bond network within the hybrid system, leading to a remarkably low regeneration energy of 1.13 GJ·t −1 CO₂, superior to conventional ILs and amine solvents. Mechanistic studies unveiled that the hydrogen bonds between EG and IL anions not only promoted CO₂ activation but also directed the reaction pathway toward the formation of thermodynamically stable carbonate species (RCO₃ − ) rather than carbamates, thus facilitating the low-energy regeneration process. This study demonstrates that hydrogen bond modulation in EG-IL systems provides a sustainable and efficient strategy for CO₂ capture.
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ORGANIC ELECTRONICS
·
2020
·
IF 3.31
Shaowei Wang,Hongyuan Li,Bowen Zhang,Zu-an Guo,Hari Bala,Shujuan Yao,Jingyi Zhang,Can Chen,Wuyou Fu,Jianliang Cao,Guang Sun,Zhanying Zhang
The quality of the photoactive layer gravely affects the characteristics and stabilities of photovoltaic device . Here, by introducing polyethylene glycol (PEG) into the methylammonium lead trihalide (MAPbI 3 ) precursor solution, we fabricate high-quality MAPbI 3 perovskite film with high coverage and large grain size . By adjusting the PEG concentration into the perovskite film, the hole-conductor-free mesoporous perovskite solar cell with carbon electrode exhibits a boosted power conversion efficiency of 11.62%, which originates primarily from the enhancements of light absorption and acceleration of carriers transfer. Meanwhile, hygroscopic PEG protects the perovskite film from moisture, which leads to the perovskite film and corresponding device exhibit superior stability. This work confirms a high-efficiency and feasible strategy using polymer materials to enhance the performance in power conversion efficiency and stability of perovskite solar cells.
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Materials Research Express
·
2020
·Vol. 7
·期 9
·095503
·
IF 1.929
Xianxian Lin,Shifang Jia,Jingyi Liu,Wenbin Wang,Huimin Cao,Xi Guo,Weisheng Sun
Thermal energy storage wood (TESW) was fabricated by using graphene aerogel encapsulated polyethylene glycol (PEG) as phase change material and wood as the matrix. The microstructure of TESW was investigated by scanning electron microscope (SEM), the thermal properties of TESW was determined by differential scanning calorimetry (DSC), thermal gravimetric analysis (TG) and laser flash diffusivity apparatus (LFA). The results showed that: (1) graphene aerogel (GA) encapsulated PEG composite was founded in the lumens of wood, there was no apparent interface between PEG and graphene aerogel; (2) the melting and freezing enthalpy of TESW were 11.81 and 27.91 J g−1, respectively. The melting and freezing point were 20 °C and 15 °C, respectively, which were suitable for human comfortable temperature; (3) incorporation of graphene aerogel improved the thermal conductivity of TESW apparently. Thermal conductivity of TESW was 0.374 W (m*K)−1, which increased about 274% compared to pure wood; (4) TG and hygroscopicity test indicated that the TESW had excellent thermal and dimensional stability. The TESW was suggested as energy conservation building material for indoor temperature regulating due to its comfortable phase change temperature and prior latent heat.
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Desalination and Water Treatment
·
2024
·
IF 1
Jia-Ying Yang,Bao-Yu Yue,Jie Teng,Xia Xu,Xiao-Ru Zhao,Xin-Yu Jiang,Jin-Gang Yu,Fang-Liang Zhou
ABSTRACT To investigate the effects of oxygen contents and surface area of the adsorbents on their removal efficiencies, poly(ethylene glycol) (PEG) with various molecular masses (200, 2,000, and 20,000) modified graphene oxide (GO-PEG) composites were fabricated and used for the removal of Pb(II) from aqueous solutions. The morphologies, specific surface area, and surface functional groups of the GO-PEG composites were characterized by field-emission scanning electron microscopy, Brunauer–Emmett– Teller method, thermogravimetric and differential thermogravimetric analyses, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. Batch experiments were conducted to evaluate the effects of contact time, initial concentration, adsorbent dosage, and temperature on the adsorption efficiencies of the adsorbents. The experimental data indicated that the adsorption of Pb(II) onto GO-PEG composites fitted well to the pseudo-second-order kinetic model and the Langmuir isotherm model. Thermodynamic studies indicated that the adsorption was a spontaneous and endothermic process. The obtained GO-PEG (200), GO-PEG (2000), and GO-PEG (20000) composites exhibited the maximum adsorption capacities of 204.50, 72.73, and 196.46 mg g –1 toward Pb(II), respectively. The higher adsorption capability of GO-PEG (200) toward Pb(II) could be attributed to its relatively higher oxygen content and larger SSA. The adsorption capacities of GO-PEG (200) toward other metal ions including Cu(II), Cd(II), Mn(II), Er(III), and Y(III) were 48.04, 80.48, 36.1, 23.1, and 12.2 mg g –1 , respectively.
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INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
·
2019
·
IF 1.426
Yan Zhang,Qihang Zhou,Yujian Liu
Polymethylene-b-poly(ethylene glycol) (PM-b-PEG) with different block length ratio was synthesized by a combination of polyhomologation and coupling reaction. The effect of hydrophilic and hydrophobic block length on the crystallization process and self-assembly behavior of PM-b-PEG was self-assembled were investigated. The results showed that with the increase of methylene units, the crystallization temperature of PM block raised from 54.59 °C to 70.93 °C gradually, while that of the PEG block reduced from 17.54 °C to 15.23 °C. In addition, the amphiphilic PM-b-PEG was self-assembled into star-like micelles in water, and its diameter extended from 98.2 nm to 151.9 nm as the block length of hydrophobic PM increased from 30 to 70. And the micelles also exhibit super stability when the concentration of copolymer precursor is 0.50 ∼ 0.90 mg/ml and the storage temperature lies in the range of 25 ∼ 60 °C.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Wenbin Guo,Zhengguang Shi,Xue Yu,Jingjing Duan
An important environmental issue is the pollution caused by poly(ethylene terephthalate) (PET) and the emitted monomers terephthalic acid (TPA) and ethylene glycol (EG). The TPA biodegradation pathway has been well documented for the microbial biodegradation and assimilation of PET; however, the PET biodegradation process by marine microorganisms via the EG biodegradation pathway is less understood. Here, we demonstrate how the marine bacteria Pseudomonas chengduensis BC1815’s membrane-anchored PET esterase (OF113_10420) breaks down PET. We also explain the characteristics of this enzyme and demonstrate that the strain assimilates PET via the EG biodegradation pathway. In addition to depolymerizing PET, PET esterase (OF113_10420) hydrolyzes BHET and MHET to generate EG more efficiently in alkaline circumstances. It has been discovered that P. chengduensis BC1815 cells exhibiting surface-displayed PET esterase (OF113_10420) have the potential to function as cell biocatalysts for the breakdown of PET. Additionally, we look into the microbial communities that have PET esterase linked to the EG biodegradation pathway, primarily those belonging to the phyla Proteobacteria and Actinobacteriota. Consequently, research on the microbial absorption and biodegradation of PET via the EG metabolism route increases our knowledge of the bioremediation of PET pollution in the marine environment and contributes to our understanding of the environmental destiny of PET pollutants in the marine environment.
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Nanomaterials
·
2025
·Vol. 15
·期 22
·1686
·
IF 4.3
Yan Xu,Qihua Sun,Jialin Li,Zhaofeng Wu,Haiming Duan
Ethylene glycol (EG) is a vital industrial raw material. However, it has the potential to be hazardous to the environment and human health. High operating temperatures and long response/recovery times limit the wide application of EG sensors. Thus, we need to develop high-performance room-temperature EG-sensing materials. This paper proposes the direct hydrothermal carbonization of magnolia hair to prepare porous microtubular carbon (CMH) for room-temperature EG sensing. SEM, TEM, and XPS characterization showed that the CMH exhibited a porous microtubular structure and contained Na, which enhanced the adsorption capacity of the CMH for ethylene glycol gas. The CMH sensor exhibits a high response (156.4) to 500 ppm ethylene glycol gas at room temperature with moderate response/recovery time (14.2/37.3 s). It exhibits good linearity in measuring EG gases in the 10–100 ppm range, with a 0.292 ppm theoretical detection limit. Additionally, CMH sensors provide excellent repeatability and long-term stability. The synergistic effect of microtubule porous structure and Na doping is the main reason for enhancing the response of the sensor to EG gas. On this basis, the gas-sensitive enhancement mechanism of CMH was analyzed. The results show that biomass carbon materials provide a new method to prepare high-performance EG gas sensors.
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ChemistrySelect
·
2025
·Vol. 10
·期 46
·e04751
·
IF 2
Zhiyan Ma,Like Dou,Hai Liang,Weifang Han
Phase change materials (PCMs) typically exhibit low thermal conductivity (TC) and limited light absorption, which restrict their application in solar thermal utilization. In this study, boron nitride microrod-supported copper (Cu@BNR) was developed as a multifunctional filler and incorporated into polyethene glycol (PEG) to fabricate PEG-based composite PCMs. The incorporation of Cu promotes the formation of a continuous thermal network and enhances photothermal conversion capability. Due to this unique structure, the PEG/Cu@BNRs composite containing 10 wt% Cu@BNRs achieves a TC of 1.344 W·m −1 K −1 , representing 5.1-fold and 2.2-fold increase compared to pure PEG and PEG/BNRs, respectively. Under simulated sunlight (100 mW cm −2 ), the PEG/Cu@BNRs composite reaches a photothermal conversion efficiency of 91.2% and demonstrates excellent shape stability and cycling reliability. As a thermal interface material in LED systems, the PEG/Cu@BNRs composite significantly reduces operating temperatures, confirming its practical thermal management capabilities. Consequently, the prepared composite PCMs integrate solar energy conversion, efficient heat conduction, and thermal storage functions, making them suitable for sustainable energy applications. Graphical Boron nitride microrod-supported copper (Cu@BNR) was developed as a multifunctional filler and incorporated into polyethene glycol (PEG) to fabricate PEG-based composite PCMs. The PEG/Cu@BNRs composite PCMs exhibit excellent heat transfer performance and high photothermal conversion efficiency.
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Desalination and Water Treatment
·
2024
·
IF 1
Huchuan Wang,Jianjun Yang,Chenchen Fang,Chuanrun Li,Guochen Zhong,Chengjun Peng
A new scale inhibitor maleic anhydride-modified sodium carboxymethyl cellulose(CMCMA), acrylic acid (AA) and polyethylene glycol ester (PEGMA maleic anhydride-modified polyethylene glycol) were synthesized by aqueous solution free radical and evaluated as scale inhibitor against the growth of calcium carbonate(CaCO 3 ) scale through the static test experiments. When the reaction ratio is m(CMCMA):m(PEGMA):m(AA) = 1:3:5, the reaction condition is 80°C, the ratio of the initiator (ammonium persulfate) is 6%, the test temperature is 70°C, and the heat retention time is 8 h can get optimal scale inhibition results. The resistance rate of CaCO 3 scales up to 89%. The copolymer structure and CaCO 3 scale crystal were characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance ( 1 H-NMR) and scanning electron microscope. The performance of CaCO 3 scale crystallization and morphology data was found to be suitable for the conditions found in the cooling water system.
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