CELLULOSE
·
2023
·Vol. 31
·期 2
·1115-1137
·
IF 5.7
Nie Yuan,Yan Ruyu,Li Mei,Li Shouhai,Lin Mingtao,Yao Na,Deng Tianxiang,Feng Xiao,Yang Xiaohua,Ding Haiyang,Xu Lina
To improve the flexibility, functionality and recyclability of ethyl cellulose (EC)-based film materials, firstly methyl-nadic-anhydride-modified ethyl cellulose (NEC) was synthesized from EC, and then epoxy castor oil (ECO) was prepared from vegetable oils. Next, a series of NEC/ECO supramolecular composite films were prepared via supramolecular recombination and epoxy ring-opening esterification. Then the molecular structure, shape memory, reprocessing, mechanical, thermal properties and other properties were analyzed in detail. The target products NEC and ECO showing excellent compatibility were successfully prepared, and relatively a few microholes existed on the fracture surface of NEC/ECO composite films. The addition of ECO significantly improved the flexibility of the composite films. The supramolecular composite films displayed relatively excellent thermal stability, and initial thermal decomposition temperature all above 300 ℃. Dynamic mechanical thermal analysis showed that the supramolecular structure of the composite systems was completely reconstructed and no obvious glass transition was observed. Under the action of transesterification catalyst, the reversible ester bonds and hydrogen bonds in the composite system endowed the material with superior shape memory property and excellent recyclability. This research can provide experimental basis and theoretical support for the development and application of functional cellulose-based materials.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 8
·11591-11604
·
IF 0
Lu Yuxi,Zeng Honghu,Lin Hua,Liang Yanpeng,Feng Mi,Zhou Zijian,Liang Zihao,Li Huawei,Chen Gongning
Since Cd(II) and As(III) have extremely opposite chemical characteristics, it is a huge challenging to simultaneously remove these two ions from aqueous solutions. Therefore, a novel iron sulfide-based porous biochar (FSB) was synthesized and used to evaluate its Cd(II) and As(III) removal performance and mechanisms. The characterization and batch experiments results indicated that FeS was successfully loaded on the surface of biochar and increased its adsorption sites. The iron sulfide-based porous biochar was very favorable for the removal of Cd(II) and As(III) in the weakly acidic environment. The maximum adsorption of Cd(II) and As(III) by FSB was 108.8 mg g −1 and 76.3 mg g −1 , respectively, according to the Langmuir and Freundlich isothermal adsorption model, and the adsorption equilibrium time was 12 h and 4 h, respectively, according to the pseudo-second-order kinetic model. In the coexisting ion system, Cd(II) adsorption was suppressed by Ca 2+ , Mg 2+ , and humic acid, but enhanced by PO 4 3− and As(III). As(III) adsorption was inhibited by PO 4 3− and humic acid. Precipitation and complexation are the predominant adsorption mechanisms of Cd(II) and As(III), which contribute to the formation of Cd-O, Fe-O-Cd, As-O, Fe-O-As, ternary complex Cd-Fe-As, and stable compounds FeAsO 4 ·2H 2 O and CdS. Therefore, The iron sulfide-based porous biochar can be an efficient and environmentally friendly candidate for the treatment of Cd(II) and As(III) co-polluted irrigation water.
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Food Analytical Methods
·
2024
·Vol. 17
·期 4
·564-573
·
IF 2.6
Duan Yunxuan,Zhang Jing,Jiang Zhilin,Lan Jingsha,Weng Xiaoqi,Zhao Minhui,Chen Jing,Zuo Yong
In this work, based on the degradation of rhodamine B (RhB) and rhodamine 6G (R6G) with the catalysis of MnO 2 nanosheets (MnO 2 NSs) under acidity condition, a colorimetric and fluorescence dual signal sensor array was developed for Baijiu discrimination. Rhodamine B and rhodamine 6G present characteristic UV-vis absorption peaks and fluorescence emission peaks at specific wavelength. MnO 2 NSs could induce the degradation of rhodamine B and rhodamine 6G and weaken the intensity of UV-vis and fluorescence. In the presence of organic acids or Baijiu, the degradation of dyes accelerated and the optical signal could be further weakened. Owing to the various of acidity, the sensor array exhibited different responses to organic acids and Baijiu, resulting in unique fingerprint maps. With the method, 8 kinds of organic acids and formic acid-acetic acid mixture samples were successfully recognized. In addition, 12 kinds of Baijiu with different flavor types were identified with 100% accuracy. Notably, 5 other distilled liquors were also successfully discriminated with no misclassifications. The method not only reduces the amount of dyes, but also improves the specificity of the sensor array, demonstrating the potential application prospects of the dual signal sensor array in Baijiu industry.
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高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 21
·期 1
·341-354
·
IF 2.3
Zhang Xueke,Chen Kaimin,Li Ziwei,Zhang Qianqian,Xu Chenming,Chang Yue,Wen Shaoguo
Cationic polyacrylate latex has attracted extensive attention due to its special properties and potential applications in wood primers, metal coatings, and fabric treatments, etc. However, cationic polyacrylate latex has poor durability and stability, which limits its use in practical applications. In this study, a functional cationic monomer (3-chloro-2-hydroxypropyl) dimethyl [2-[(2-methyl-1-oxoallyl)oxy]ethyl] ammonium chloride (DEAC) was combined with two conventional monomers of methyl methacrylate (MMA) and butyl acrylate (BA) to prepare cationic polyacrylate latex by a semi-continuous emulsion polymerization. The obtained latexes showed typical cationic character with zeta potential in the range of + 40 to + 65 mV. The effect of DEAC on the stability of latex was studied and good alkali resistance could be gained at high DEAC content. Water resistance and mechanical properties of the film before and after crosslinking are studied in detail. The results showed that the water absorption reduced from 60.04% to a minimum of 9.18%, and the tensile strength increased from 3.9 to 8.4 MPa, which was comparable to solvent-based polyacrylate films. This work provides a new strategy for the preparation of waterborne cationic polyacrylate latex with improved water resistance and good mechanical properties, etc., which can be applied in papermaking, textiles, wood primers, and other potential fields. Graphical abstract
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高影响因子
Journal of Coatings Technology and Research
·
2024
·Vol. 21
·期 4
·1333-1342
·
IF 2.3
Wei Haoran,Liu Henghui,Li Min,Fu Zhinan,Liu Liqun,Zhang Hanjie,Fan Chuanjie,Xu Jun,Wang Jie
Polydimethylsiloxane (PDMS) has been widely used to improve the antifouling properties of polyurethane (PU) coatings due to its low surface energy. Herein, a novel type of waterborne polyurethane (WPU) coating with good antifouling and self-healing abilities was synthesized by incorporating PDMS and disulfide bonds. The effects of PDMS and the disulfide content on the thermal, mechanical and surface properties of the coatings were investigated. Benefiting from a rational structural design, the obtained WPU coating manifested superior antifouling properties. In addition, the WPU coating exhibited good healing capabilities owing to the collaboration between dynamic disulfide bonds. Interestingly, the self-healing of an experimental crack occurred at a temperature above 60°C, and the coating recovered its mechanical properties to 95%. This finding has great significance for the design of multifunctional smart coatings for diverse applications.
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高影响因子
CHROMATOGRAPHIA
·
2023
·Vol. 86
·期 7
·541-551
·
IF 1.7
Guo Xinyuan,Shang Panpan,Wei Benben,Du Wenrong,Lan Yong,Bai Ligai,Qiao Xiaoqiang,Ma Zhengyue
This study presents the development of three new chiral stationary phases. Three new peptide chiral stationary phases with a main chain of l- proline, l- phenylalanine, l- valine and l- leucine and different terminals of l- citrulline, l- lysine and l- tryptophan immobilized on 3-aminopropyltrimethoxysilane modified silica gel were prepared; furthermore, successful analyses and characterizations were conducted using Fourier transform infrared spectra, elemental analysis, and thermogravimetric analysis. After this, the enantioselective performance of the three peptide stationary phases columns was evaluated. The evaluation used nine racemic compounds under normal-phase high-performance liquid chromatography mode. Optimized enantiomeric separation conditions were established. Under these conditions, the resolutions of flurbiprofen, naproxen, benzoin, 1 ,1ʹ-bi-2-naphthol and ketoprofen on the CSP-1 column were 1.61, 2.0, 0.62, 0.52 and 1.20, respectively. In addition, the reproducibility of the CSP-1 column was also investigated. The results of the investigation illustrated that the stationary phases have good reproducibility (RSD = 0.12%, n = 5).
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 6
·1-9
·
IF 2.8
liu Yulei,Qi Haichao,Liu Changfeng,Li Chao,Zhao Xinke,Hou Jingbin,Li Liangbin
Electroless plating is a promising method to achieve material surface metallization, low rupture work of plated coating and complex production processes have become important factors that restrict its progress. In this study, a facile method combined with primer modification (mixture of SiO 2 particle and resin) and electroless deposition to fabricate a high-adhesion Cu-plated coating is demonstrated. Results showed that poly(ethylene terephthalate) (PET) modified with primer could absorb Ag + through the coordination effect because hydrophilic groups (–OH and –NH 2 ) were possibly used as a bridge for chemisorbing of rare metal ions (Ag + ) through ion exchange, which acted as a catalyst for the deposition of Cu coating on its surface. More importantly, introducing SiO 2 particles in the primer can improve surface roughness, which is enhanced from 0.643 to 0.829 μm of modified coating, result in the improvement of substrate/deposited coating contact area, which would facilitate the enhancement of the adhesion behavior of plated coating. The deposition of bead-like structure Cu coating on primer-modified PET surface with a higher average roughness value possessed excellent electrical property, adhesion and crystallization. The resistivity of the copper patterns is approximately 9.81 × 10 −6 Ω·cm. It is promising to integrate this kind of metal material with excellent performance in future flexible devices.
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高影响因子
Nano Research
·
2023
·Vol. 17
·期 3
·1552-1563
·
IF 9.9
Ye Jinrui,Wang Zhongbao,Lei Qin,Sun Lei,Gu Jinfeng
Structural energy storage composites present advantages in simultaneously achieving structural strength and electrochemical properties. Adoption of carbon fiber electrodes and resin structural electrolytes in energy storage composite poses challenges in maintaining good mechanical and electrochemical properties at reasonable cost and effort. Here, we report a simple method to fabricate structural supercapacitor using carbon fiber electrodes (modified by Ni-layered double hydroxide (Ni-LDH) and in-situ growth of Co-metal-organic framework (Co-MOF) in a two-step process denoted as Co-MOF/Ni-LDH@CF) and bicontinuousphase epoxy resin-based structural electrolyte. Co-MOF/Ni-LDH@CF as electrode material exhibits improved specific capacity (42.45 F·g −1 ) and cycle performance (93.3% capacity retention after 1000 cycles) in a three-electrode system. The bicontinuousphase epoxy resin-based structural electrolyte exhibits an ionic conductivity of 3.27 × 10 −4 S·cm −1 . The fabricated Co-MOF/Ni-LDH@CF/SPE-50 structural supercapacitor has an energy density of 3.21 Wh·kg −1 at a power density of 42.25 W·kg −1 , whilst maintaining tensile strength and modulus of 334.6 MPa and 25.2 GPa. These results show practical potential of employing modified commercial carbon fiber electrodes and epoxy resin-based structural electrolytes in structural energy storage applications.
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高影响因子
POLYMER BULLETIN
·
2023
·Vol. 81
·期 1
·969-993
·
IF 3.2
Li Chen,Zhen Weijun
Modified attapulgite (ATP-PS) grafted with polystyrene (PS) was prepared based on Pickering emulsion polymerization. The characterization of ATP-PS was studied by transmission electronic microscopy (TEM), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectrometer (FTIR) and contact angle analysis. TEM analysis showed that the surface of ATP-PS was coated with PS organic layer; XPS analysis showed that the proportion of C element in ATP-PS was much larger than that of ATP; FTIR analysis found that ATP-PS had more PS specific functional group peaks than that of ATP; Moreover, contact angle results showed that the hydrophobicity of ATP-PS was significantly improved compared with ATP. The above characterization analysis proved that the modification of ATP-PS was successful. Moreover, polyphenylene sulfide (PPS) hydrophobic porous membrane was prepared with 1-chloronaphthalene and dibutyl phthalate as mixed diluents and ATP-PS as additives. The results showed that 0.8 wt% of ATP-PS had a great effect on the structure and performance of the membrane. With the increasing of the mass proportion of ATP-PS in the preparation of PPS base membrane, the microstructure of PPS based membrane was changed from blocky bicontinuous to spherical granular bicontinuous. When the addition amount of ATP-PS was 0.8 wt% of the total mass of PPS base membrane, PPS based membrane had strong hydrophobicity and organic solvent affinity, and its n -butanol flux could reach 106.9642 L m −2 h −1 bar −1 . The rheological properties of PPS based membrane showed that ATP-PS was well compatible with the PPS, and ATP-PS was beneficial to crosslink between PPS molecular chains, thereby increasing the mechanical properties of PPS based membrane. Phase transition analysis demonstrated that ATP-PS (0.8 wt%) increased the melting temperature (2.34 °C) and crystallization temperature (2.63 °C) of PPS based membrane compared to PPS, thus allowing PPS to complete the phase transition at higher temperature interval during film formation, resulting in a stable microscopic cluster structure. Based on hydrophobic porous PPS membrane, PPS/ATP-PS/TA nanocomposites membrane with ATP-PS selective layer was prepared by co-deposition of tannic acid (TA) and ATP-PS on the surface of PPS membrane. The performance of PPS/ATP-PS/TA nanocomposites membrane was studied, which showed that the n -butanol flux of PPS/ATP-PS/TA nanocomposites membrane was 61.2913 L m −2 h −1 bar −1 . More importantly, the simulated filtration performance of MB dye organic waste liquid (the solvent is n -butanol) showed that the maximum rejection rate of MB dye reached 99.82%. These results demonstrate that PPS/ATP-PS/TA nanocomposites membrane will have potential application in the filtration of organic dye wastewater.
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高影响因子
CELLULOSE
·
2023
·Vol. 31
·期 1
·643-659
·
IF 5.7
Cai Lu,Lv Cun,Yan Xinyue,Mao Haiyan,Zhou Tianchi,He Xuemei,Zhu Tianxue
Fluorinated compounds with side-chains longer than six carbon have been banned due to their toxicity to environment, organisms and human, so that attentions have been paid on degradable short-chain fluorinated or non-fluorinated materials. Here in this paper, several novel short-chain fluorinated polysiloxanes with multi-functions were synthesized successfully and applied on cotton fabrics. Chemical structure of these fluorinated polysiloxanes were characterized by Fourier-transform infrared spectrum and nuclear magnetic resonance. Liquid repellency, washing durability, thermal stability, fabric style and color deepening of treated cotton fabrics were investigated. Additionally, the effect of benzoyl spacer on the surface wettability was fully studied. Results demonstrate that FPAPS-20@cotton (cotton fabric treated by fluorinated polysiloxane with 20% fluorine content) exhibits the greatest liquid repellency as the contact angles for water, ethylene glycol, glycerol and octane are 150.1°, 132.3°, 138.1° and 105.5°. Moreover, the benzoyl spacer plays a positive role in the durable wettability of FPAPS-20@cotton, resulting in the water contact angles ranging from 150.1° to 146.0° when FPAPS-20@cotton exposes to the water droplet for 20 min. X-ray photoelectron spectroscopy provides the experimental evidence for this result. On the other hand, thermal-gravimetric analysis confirms that the fluoroalkyl segments of the fluorinated polysiloxanes can decelerate the thermal decomposition of cotton fabrics. Moreover, compared with the untreated dyed cotton fabric, the K/S values of cotton fabrics with navy, red and orange color treated with FPAPS-20 increase by 42.61%, 11.00% and 18.18%, respectively.
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高影响因子
Science China-Materials
·
2023
·Vol. 67
·期 1
·321-330
·
IF 8.1
Yan Xiaocao,Shi Qi,Cai Yudong,Tong Yaxuan,Wu Jihong,Weng Yunxuan,Gao Hainan
Functional hydrogel materials with large-scale deformation induced by ultra-low salinity as an external stimulus have promising applications in seawater osmotic energy harvesting, stimulus-responsive separation materials, intelligent sensors, and actuators. A salt-responsive hydrogel undergoing large volumetric changes (∼1/60) with the use of dilute salt solution (0.01–0.6 wt% NaCl) is designed via facile random copolymerization of polyelectrolyte and zwitterionic polymer chains in this study. The salt-responsive swelling/deswelling properties, morphologies, and mechanical properties of the prepared hydrogels are systematically examined. Internal reconfiguration of distinct polymeric networks is characterized by different salinity percentages via Raman spectroscopy. Subsequently, a portable ion-detection device comprising easy-to-access capillary tubes and salt-responsive hydrogel is successfully designed and compared with a commercial water quality monitoring device. Moreover, intelligent liquid valves with autosensing and actuating functions are developed for the regulation of liquid leakage and transport using the same salt-sensitive hydrogel. It is highly expected that these salinity ultra-sensitive ionic hydrogels would have great potential in monitoring and regulating freshwater resources, seawater osmotic energy harvesting, stimulus-responsive separation materials, and intelligent soft robotics and electronics.
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高影响因子
Nature Water
·
2024
·Vol. 2
·期 7
·663-673
·
IF 0
Zou Hao,Yang Xinge,Zhu Jingling,Wang Fan,Zeng Ziya,Xiang Chengjie,Huang Danfeng,Li Jun,Wang Ruzhu
In the face of escalating global water scarcity, intensified by population growth and agricultural demands, there is an urgent need to improve water efficiency in greenhouse cultivation. The rapid development of atmospheric water harvesting technology offers us an opportunity to address this issue. Here a novel, solar-driven, scalable hygroscopic gel, termed TCP-Li, that demonstrates exceptional water uptake capacity (3.38 g water g sorbent −1 ) and rapid solar thermal water release was reported. As a proof-of-concept application, we utilize this material in a transpiration and evaporation adsorption device (TEAD), which leverages the properties of TCP-Li to efficiently harvest water vapour from plant transpiration and soil evaporation. TEAD operates passively, absorbing moisture at high relative humidity during the night and releasing water for irrigation during the day using natural sunlight. Greenhouse experiments confirmed the efficacy of TEAD in ensuring normal plant growth while providing additional irrigation water (87.1 g per plant and 1,890.6 g m −2 ), thereby achieving an average water-saving effect of 44.9%. This study introduces a groundbreaking solution aimed at enhancing water efficiency in greenhouse cultivation, offering substantial potential for commercial and large-scale agricultural applications and significantly contributing to mitigating the global water crisis and optimizing water use in modern agriculture.
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危险品化学品经营许可证（带存储）