INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Guolin Zheng,Yifan Cui,Zhe Jiang,Man Zhou,Yuanyuan Yu,Ping Wang,Qiang Wang
Superhydrophobic and hydrophobic properties are generally created by adopting low surface free energy materials. Therefore, most studies have focused on creating surface hydrophobicity by using hydrophobic or fluorinated materials. However, few studies are reported on realizing surface hydrophobicity by directly introducing hydrophilic molecules, which is also a challenge. Herein, with platinum nanozyme as the catalyst, the novel hydrophobic coatings have been rapidly gained via anchoring the polymer of hydrophilic gallic acid and chitosan or chitosan quaternary ammonium salt onto cotton fabric surface. Notably, the novel hydrophobic coatings exhibit significant advances compared with conventional hydrophobic ones created by utilizing fluorinated or hydrophobic materials, which breaks the limitation of employing low surface energy materials for gaining surface hydrophobicity. Subsequently, the sodium methyl silicate was grafted on the polymer's coatings to strengthen surface hydrophobicity and the abrasion resistance of hydrophobicity. Interestingly, the heating could induce the hydrophilicity of cotton fabric to recover to hydrophobicity. Moreover, the hydrophobic coatings also possess good photothermal conversion, UV resistance, and anti-oxidation activity for self-cleaning application and oil water separation. Briefly, the present work may open a new direction for preparing novel hydrophobic coatings by combining gallic acid and chitosan-based macromolecular carbohydrates.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xinzhu Gao,Wei Yuan,Yang Yang,Yaopeng Wu,Chun Wang,Xuyang Wu,Xiaoqing Zhang,Yuhang Yuan,Yong Tang,Yu Chen,Chenghao Yang,Bote Zhao
Utilizing ionic liquids (ILs) with low flammability as the precursor component for a gel polymer electrolyte is a smart strategy out of safety concerns. Solvate ionic liquids (SILs) consist of equimolar lithium bis(trifluoromethylsulfonyl)imide and tetraglyme, alleviating the main problems of high viscosity and low Li+ conductivity of conventional ILs. In this study, within a very short time of 30 s, a SIL turns immobile using efficient and controllable UV-curing with an ethoxylated trimethylolpropane triacrylate (ETPTA) network, forming a homogeneous SIL-based gel polymer electrolyte (SGPE) with enhanced thermal stability (216 °C), robust mechanical strength (compression modulus: 1.701 MPa), and high ionic conductivity (0.63 mS cm–1 at room temperature). A Li|SGPE|LiFePO4 cell demonstrates high charge/discharge reversibility and cycling stability with a capacity retention rate of 99.7% after 750 cycles and an average Coulombic efficiency of 99.7%, owing to its excellent electrochemical compatibility with Li-metal. A close-contact electrode/electrolyte interface is formed by in situ curing of the electrolyte on the electrode surface, which enables the pouch full cell to work stably under the conditions of cutting/bending. In view of the excellent mechanical, thermal, and electrochemical performances of SGPE, it is believed to be a promising gel polymer electrolyte for constructing high-safety lithium-ion batteries (LIBs).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Yingzi Lin,Junjie Chen,Hao Li,Lei Chen,Baoling Yuan,Chunyan Shi,Siwen Li,Gen Liu,Yuefeng Xie
Acid red 73 (AR73) is a representative dye pollutant that poses a threat to the environment and human health. Effectively removing this type of pollutant by conventional processes is difficult. However, this study found that compared with UV/PDS, UV/O 3 , and PDS/O 3 , UV/O 3 /PDS composite system had the highest degradation effect on AR73. The degradation efficiency in the composite system reached 97.61% within 30 min, and the synergistic coefficients in the composite system were all greater than 1. In the UV/O 3 /PDS system, ·OH was the main free radical that mainly degrades AR73. The increase of PDS dosage promoted the degradation of AR73, but the increase of O 3 dosage was difficult to greatly improve the degradation of AR73 effect. The kinetic model of the apparent reaction rate was determined. The UV/O 3 /PDS system can efficiently degrade AR73 in a wide range of substrate concentrations and pH levels, and at the same time showed good adaptability to various concentrations of anions (Cl − , CO 3 2− , SO 3 2− , and C 2 O 4 2− ). Under raw water quality, the degradation effect of AR73 was still as high as approximately 90%. The theoretical attack site was obtained by DFT calculation , and the possible degradation pathway of AR73 was proposed based on the GC-MS spectrum and UV–Vis absorption spectrum . The attack of –N N- by ·OH, SO 4 − , and O 3 was proposed to be the main possible degradation pathway for AR73. Therefore, this study further improves the understanding of the UV/O 3 /PDS system and shows the potential applicability of this system in the treatment of dye wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Tan Meng,Xiao Su,Peizhe Sun
Geosmin (GSM) and 2-methylisoborneol (2-MIB) are representative musty/earthy odor compounds commonly present in surface water. In present study, the degradation of GSM and 2-MIB subject to different UV-based advanced oxidation processes (AOPs), including UV/H 2 O 2 , UV/S 2 O 8 2− , UV/chlorine, and UV/chloramine, in a phosphate-buffered saline (PBS) was conducted in a photoreactor with reflective inner surfaces and compared with that in an environmental water sample. A dynamic model to predict the degradation of GSM and 2-MIB in the photoreactor with reflective inner surfaces in the four UV-based AOPs was developed applying the second-order rate constants for the GSM and 2-MIB with primary reactive species (i.e., •OH, •Cl, and •SO 4 − ) determined in this study. The model was proven to successfully simulate the degradation of GSM and 2-MIB. In addition, 8, 7, 8, and 11 degradation intermediates were detected from UV/H 2 O 2 , UV/S 2 O 8 2− , UV/chlorine, and UV/chloramine in this study, and possible degradation pathways were proposed. This study is the first to report the degradation kinetics and formation products of GSM and 2-MIB in UV/chloramine. Research based on photoreactors with reflective inner surfaces may provide some guidance for eliminating GSM and 2-MIB in UV-based AOPs for full-scale engineering applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Jiayao Yang,Jinfeng Dai,Xiaohuan Liu,Shenyuan Fu,Enmin Zong,Pingan Song
Lignin, as a natural polymer material, has the advantages of green safety, renewable, and pollution-free. It has a wide application prospect in the field of thermosetting. However, it has been attractive but a huge challenge to design high performance and high added-value lignin-based epoxy resin. Herein, lignin-based epoxy (LEP) was synthesized from moso bamboo-derived lignin, and then lignin-based epoxy/titanium dioxide (LEP/TiO 2 ) hybrid nanoparticle was synthesized via liquid deposition method for modifying lignin-based epoxy resin to prepare multifunctional bio-based epoxy. The results show that the LEP/TiO 2 hybrid nanoparticle exhibits a stable topological surface shape and good dispersion and uniformity. By adding 10 wt% LEP/TiO 2 hybrid nanoparticles, the multifunctional bio-based epoxy exhibits good mechanical strength and toughness, and the tensile strength and fracture toughness reach 36 MPa and 1.26 MPa·m 1/2 , respectively. In addition, the thermal stability , UV absorption and antibacterial properties of the multifunctional bio-based epoxy are further improved. This study provides a facile and efficient method for the preparation of high-performance multifunctional bio-based epoxy composite and a novel solution for the utilization of lignin.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yuanxi Huang,Lingjun Bu,Yangtao Wu,Shumin Zhu,Shiqing Zhou,Zhou Shi,Dionysios D. Dionysiou
UV/sodium percarbonate (UV/SPC) advanced oxidation process is an efficient and green technology to remove contaminants of emerging concern (CECs), with the simultaneous formation of hydroxyl radical ( • OH) and carbonate radical (CO 3 •− ). This study investigated the degradation of eight CECs in UV/SPC process, including phenol, atrazine, bisphenol A, ibuprofen, sulfadiazine, acetaminophen, carbamazepine, and diuron. A model was established to simulate the experimental results, which shows that both • OH and CO 3 •− played crucial roles in UV/SPC process, and the steady-state concentrations of CO 3 •− were much higher than that of • OH. The higher concentration compensates for the low reactivity of CO 3 •− with CECs and the loss of • OH depleting by CO 3 •− . Also, the Hammett constants decreased linearly with increasing natural logarithms of rate constants, indicating the selectivity of CO 3 •− with electron-donating substituents. In real water, CEC degradation was significantly inhibited due to the competition for light absorption from background compounds and scavenging of free radicals, especially CO 3 •− , by water matrix. Further, demethylation, decarbonylation, hydroxylation, amino oxidation, and quinonization were proposed as the main reactions for CEC degradation in UV/SPC process. The minimum electrical energy per order (EE/O) was calculated as 0.152 kWh m −3 , with SPC dose of 0.138 mM and UV intensity of 2.02 × 10 -7 Einstein L −1 s −1 .
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 9
·3358
·
IF 3.748
Wenqian Li,Yanli Dou,Xuefei Li,Shengbo Fang,Jian Li,Quanming Li
In this paper, a flame-retardant, UV-cured coating was prepared on the fiber composites’ (FC) surface via a thiol-ene click reaction using pentaerythritol tetra(3-mercaptopropionate) (PETMP), triallyl cyanurate (TAC), and 2-hydroxyethyl methacrylate phosphate (PM-2). The synergistic effectiveness of phosphorus (P), nitrogen (N), and sulfur (S) was studied in detail by changing the proportion of these reactants. Sample S4(N3P2)6,with a molar ratio of N and P elements of 3:2, and the thiol and vinyl groups of 4:6 had the highest LOI value (28.6%) and was self-extinguishing in the horizontal combustion test. It had the lowest peak heat release rate (PHRR) value (279.25 kW/m2) and total smoke production (2.18 m2). Moreover, the thermogravimetric analysis (TG) showed that the decomposition process of the coated composites was delayed. The conversion rate of the double bond and the thiol of S4(N3P2)6was 100% and 92.0%, respectively, which showed that the cross-linked network structure was successfully formed. The tensile strength and the flexural strength of coated composites improved, and the transparency of the coating can reach 90%. These characteristics showed that the UV-cured coatings could be used in industrial production to effectively prevent fires.Keywords:UV-curable coating;thiol-ene click reaction;flame retardancy;natural fiber
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Shuang Qiu,Jun Sun,Yuchun Li,Tao Zhu,Hongfei Li,Xiaoyu Gu,Bin Fei,Sheng Zhang
Polylactic acid (PLA) is flammable, susceptible to UV light , and slow during degradation in nature, which limits the expansion of its application fields. Herein, a multifunctional bioderived additive (PA@TA-CS) was prepared by free radical grafting reaction between chitosan (CS) and tannic acid (TA) with the coating of phytic acid (PA) to achieve an all-round improvement of PLA. Only 3%PA@TA-CS in PLA increased the LOI value to 26.9%, upgraded the UL-94 level to V-0, and blocked nearly 99% UV light. In addition, by the presence of PA@TA-CS, the degree of molecular chain scission caused by hydrolysis and microbial degradation was significantly intensified. This work inherited the idea of returning to nature from nature and provided an effective strategy for extending the service life of bioplastics .
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Hang Li,Yanling Yang,Jiawei Ren,Zhiwei Zhou,Xing Li,Yuankun Liu,Jianyong Feng
Pre-ozonation is often used as an effective method to assist coagulation in removing organic contaminants . In this study, a new process that combining ozone (O 3 ) with vacuum ultraviolet (VUV/UV) process (VUV/UV/O 3 ) is investigated to enhance the removal of organic matters in greywater from public buildings or household. The influence of organic characteristics (molecular weight distribution, hydrophobicity , and fluorescence) in greywater on VUV/UV/O 3 enhanced coagulation has not been fully studied. Herein, organic matters of greywater were separated and classified, and fates of organic fractions by VUV/UV/O 3 enhanced coagulation were clarified. Greywater contains tryptophan-like and tyrosine-like proteins, and terrestrially derived humic-like substances. The highest UV 254 , LAS , DOC and COD Cr removal efficiency from greywater could reach up to 47.54%, 58.92%, 17.96% and 15.76% in VUV/UV/O 3 enhanced coagulation, respectively. The removal efficiency of tryptophan-like and tyrosine-like in filtrates of varied molecular weight ranges by VUV/UV/O 3 enhanced coagulation was 93.59%–98.13% and 89.86%–95.53%, respectively. VUV/UV/O 3 enhanced coagulation was effective for the removal of bio-polymers, humic substances and low molecular weight acid ≤ 30 kDa, while it was insignificant for that of 0.22 µm - 100 kDa. Particle size of flocs increased significantly in filtrates obtained from increasing membrane pore size, indicating that macromolecular organic matter was more likely to form flocs. Finally, the VUV/UV/O 3 could improve coagulation on the removal of varied organic pollutants and improve sedimentation by changing the flaky flocs to dense ones. Therefore, the results demonstrate VUV/UV/O 3 is an effective pre-oxidation method to enhance the effect of coagulation on greywater treatment.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Jinshan Liu,Jinhui Li,Tao Wang,Dongxu Huang,Zhipeng Li,Ao Zhong,Wen Liu,Yuying Sui,Qiang Liu,Fangfang Niu,Guoping Zhang,Rong Sun
Thermoplastic polyimide (TPI) has been extensively applied in electronic industry due to improved processibility, superior mechanical and dielectric properties. However, TPI is still restricted by the limited thermal stability and insufficient UV absorption for the application of temporary bonding and debonding (TBDB) in ultra-thin chip package. In this work, the rigid biphenyl group, twisted non-coplanar structure, rigid bulky side group and flexible ether bond are introduced to obtain a series of novel quaternary copolymerized TPIs with superior comprehensive performance. The results show that the as-prepared TPI possesses excellent solubility in NMP , DMF, DMAc and DMSO , and thermoplasticity ( E ’ drop > 10 3 MPa). Besides, the temperature of 5% weight loss and glass transition temperature could achieve as high as 548.1 °C and 335.4 °C, respectively. Furthermore, the tensile strength of TPI-4 is 128.7 MPa and elongation at break is about 14.2%. Moreover, the TPI-4 also exhibits superior adhesion on silicon wafer (adhesion strength >5 B by hundred grid test) and wonderful absorption at 355 nm UV laser (99.7%). At last, the application in TBDB process has also been proved with a laser energy of 400 mJ/cm 2 within 60 s, showing superior efficiency and low-cost. All these results prove their application in TBDB of ultra-thin chip package for 5G era and so forth.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Yanting Chen,Mingxia Wang,Feng Yan,Wei Wang,Yuning Qu,Hongbo Fang,Zhenyu Cui,Benqiao He,Jianxin Li
In order to produce hydrogen fuel in green and environmentally friendly method, a series of novel metal-5,10,15,20- meso -tetra(p-hydroxypheny) porphyrin (MTHPP, M = Cu, Zn and Ni) mono-dispersedly functionalized MTHPP-sg-PSf/TiO 2 mixed matrix membranes (MP 12 -M 3 MMMs) were prepared via the in-situ surface grafting. UV–Vis induced hydrogen evolution from water shows an increasing order of NiP 12 -M 3 < P 12 -M 3 < ZnP 12 -M 3 < CuP 12 -M 3 , and the hydrogen production by CuP 12 -M 3 was up to 70.63 mmol/m 2 , which is 7.25 times higher than that of control membrane without metal ion (P 12 -M 3 ). The apparent quantum yield (AQY) at λ = 420 nm of CuP 12 -M 3 was 31.7 %, which are better than most reported photocatalysts. Furthermore, the hydrogen evolution performance of the MP 12 -M 3 MMMs are higher than that of equivalent MTHPP-TiO 2 powder, indicating that the porous membrane can immobilize porphyrin and TiO 2 monodispersely to improve its catalytic performance significantly. Finally, the photocatalytic mechanism of the MP 12 -M 3 MMMs was explored by electrons transfer rate constant (k ET ), excited state oxidation potential (E OX(dye*) ), electron spin resonance (ESR) and density functional theory (DFT). This work details the construction a photocatalytic membrane by novel surface modification method, which can be used for long-term photolysis of water to produce hydrogen and provide an effective strategy for improving hydrogen production performance.
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Lei Wang,Qiumeng Zheng,Peilong Xu,Yunjing Li,Yeqiang Tan,Rui Wang,Longyun Hao
In this paper, a reactive amphiphilic alginate was prepared by an Ugi reaction using 4,4′-diaminostilbene-2,2′-disulfonic acid and its structure was analyzed by FT-IR and 1 H NMR measurement. Subsequently, it was utilized as emulsifier to prepare polyurethane acrylate (PUA) emulsion and the colloidal properties including zeta potential , droplet size distribution and stability were evaluated. The results showed that the PUA emulsion by this modified alginate had better colloidal stability than that by original one. Finally, stable PUA emulsion was used for surface treatment of cotton fabrics in a UV curing process to improve their anti-wrinkle performance. By measuring the wrinkle recovery angle, it was found the anti-wrinkle properties of cotton fabrics were significantly improved with the increase in the amount of modified alginate. In addition, this anti-wrinkle finishing method was found to have many advantages such as low temperature, low yellowing as well as high washing resistance.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）