CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jia-Yue Zhang,Tian-Run Lv,Yi-Han Xue,Wen-Hai Zhang,Ming-Jie Yin,Quan-Fu An
Hydrogel-based physical dual-encryption typically relies on the reversible shape-deformation of polymer chains for the decryption. However, the stored information is confronted by indecipherability at the microscale because the intrinsic relaxation of polymer chains would disrupt the fidelity of encoded information. Inspired by female Doryteuthis opalescens squid’s camouflage strategy (i.e. , switching a stripe on its mantle from nearly transparent to opaque white), we devised a reversible transmittance-changeable hydrogel layer to fully cover the mono-encrypted information layer for dual-encryption. The micro-structured hydrogel was manufactured via 3D printing to encode the information, which can be decoded by UV-induced fluorescent emission. Then, the white camouflage hydrogel was constructed to conceal the mono-encrypted layer, which will not affect the information encoding layer during the reversible polymer chain mobility. The information can be decoded with alkaline solution and UV irradiation in a rapid speed, i.e. , in 4 min, with good reusability. Moreover, the information was accurately unveiled even at microscale resolution, holding great promise for high-level encryption at the device level.
研究领域:
材料科学
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生物仿生学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 24
·12968-12976
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IF 14.511
Boyu Cui,Hao Xie,Hao Sun,Tong Ji,Shuang Li,Xue Jia,Weihong Wang
Converting wheat straw waste into a high-performance material is necessary and challenging from the perspective of “waste to wealth” and green development. This study successfully fabricated an anisotropic ultrastrong, light-transmitting, and biodegradable film from wheat straw using the top-down strategy. The resulting wheat straw film (WSF) exhibited superb tensile strength (up to 754.34 MPa), specific strength (up to 580.26 MPa cm3 g−1), and toughness (up to 18.72 MJ m−3) due to the well-aligned cellulose nanofibers after the chemical treatment and densification. Moreover, the WSF exhibited remarkable transmittance (≈74%), haze (≈79%), and anisotropic optical properties. Considering its degradability and excellent performance, the full wheat straw-based film could be applied to sustainable biomass-based products (such as optoelectronic devices and flexible electronics).
研究领域:
材料科学
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绿色化学
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生物质工程
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产品关联
DOI
高影响因子
Journal of Advanced Ceramics
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2021
·Vol. 10
·期 6
·1326-1337
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IF 6.707
Li Ke,Rao Jiancun,Ning Congqin
The novel dental ceramics can be fabricated at lower temperatures when sol-gel derived lithium disilicate glass ceramics (LDGC) was used as an additive for yttria stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics. The effect of LDGC on the sintering, mechanical, and translucent properties of Y-TZP ceramics was investigated in the present study. The results showed that the LDGC additive effectively improved the densification of Y-TZP at 1100 °C, which was much lower than the sintering temperature for pure Y-TZP. When sintered at 1100 °C, the Y-TZP with 1 wt% LDGC reached a relative density of 95.45%, and prossessed a flexural strength of 482.4 MPa and a fracture toughness of 5.94 MPa·m 1/2 . Moreover, its translucency was also improved. While, the addition of LDGC could result in an escape of yttrium atoms from the grain lattice of zirconia, which induced the tetragonal-monoclinic transformation of zirconia and abnormal growth of monoclinic grains. The escaped yttrium atoms diffused into the intergranular glass phase. The results indicated that the novel Y-TZP-LDGC ceramics has a great potential to be used for all-ceramic restorations.
研究领域:
材料科学
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牙科医学
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 4
·827
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IF 3.2
Yamin Chen,Dianyang Li,Yougen Chen,Hui Fang
Four kinds of silicone hydrogel transparent contact lenses (CLs) with different formulations were prepared by the free radical photocuring polymerization. By mixing polyethylene glycol diacrylate (PEGDA) of 1000 Da with ethylene glycol dimethacrylate (EGDMA) and adding other silicone monomers and hydrophilic monomers, the transparency and flexibility of the material were successfully achieved. By optimizing the weight percentage of each component, the best balance of optical performance can be achieved. The photocuring properties of the materials were characterized by electronic universal test, double-beam UV-visible spectrophotometer, Atomic Force Microscope (AFM), Scanning Electron Microscope (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the addition of higher PEGDA content reduces the elastic modulus, improves curing efficiency, improves equilibrium water content (EWC), and enhances light transmission. Hydrogels containing only high PEGDA but no EGDMA showed similar curing rates, water content, and elastic modulus, but had the worst optical transparency, far inferior to the materials mixed with PEGDA and EGDMA. Additionally, imaging performance of the CLs was further evaluated through simulation analysis using Ansys Zemax OpticStudio2024 software. This research provides a new choice of material consideration to improve the performance and wearing comfort of CLs.
研究领域:
材料科学
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生物医学工程
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眼科研究
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产品关联
DOI
PubMed
高影响因子
Applied Sciences-Basel
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2021
·Vol. 11
·期 23
·11094
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IF 2.679
Shanshuai Lu,Congling Li,Rui Liu,Aifeng Lv
Particulate matter (PM), composed of tiny solids and liquid droplets in polluted air, poses a serious threat to human health. Traditional air filters usually cause secondary pollution due to their poor degradability. Here, shellac, as an environmentally friendly natural organic material, was successfully applied to fabricate biodegradable air filters. Since pure shellac fiber shows poor mechanical properties and bad light transmittance, we then introduced a small amount of polyvinylpyrrolidone (PVP) in the shellac solution to prepare highly efficient air filter membranes by the electrospinning method. The prepared PVP-assisted shellac nanofiber membrane (P-Shellac FME) demonstrated improved filtration efficiencies as high as 95% and 98% for PM2.5and PM10, respectively. The P-Shellac FME also showed good stability, with filtration efficiencies still above 90% and 95% for PM2.5and PM10even after six hours of air filtering under high PM concentrations. The pressure drop going through the filter was only 101 Pa, which is also comparable to the value of 76 Pa obtained using commercial polypropylene nanofibers (PP nanofibers, peeled off from the surgical mask), indicating good air permeability of P-Shellac FME. Additionally, P-Shellac FME also showed the advantages of translucence, biodegradability, improved mechanical properties, and low cost. We believe that the P-Shellac FME will make a significant contribution in the application of air filtration.Keywords:shellac;nanofiber;air filtration;electrospinning method;biodegradability;translucence
研究领域:
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
BIOMACROMOLECULES
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2022
·
IF 6.978
Guangchao Zheng,Wei Gao,Xue Li,Zhiqiang Wu,Lin-An Cao,Enke Feng,Zhiming Yang
Gel polymers are widely used in different fields due to their unique properties, especially in flexible electronic devices. However, developing multienvironmentally-tolerant (antifreezing, antidrying, and solvent-resistant) gel polymer-based soft electronics is still a significant challenge. Herein, a binary solvent system-based versatile organohydrogel is designed and successfully prepared, which exhibits superior stretchability, favorable self-adhesive properties, prominent temperature tolerance, and excellent solvent-resistant capabilities. Furthermore, the as-assembled organohydrogel-based sensor demonstrates a satisfied sensitivity (GF = 1.8), wide strain range (5–500%), and outstanding human motion detection. Meanwhile, the obtained organohydrogel can also serve as an all-weather sensor for achieving precise and reliable mechanical sensing in a wide temperature range from −50 to 50 °C and diverse liquid media consisting of water, toluene, and carbon tetrachloride. Interestingly, the organohydrogel displays a repeatable transmittance change behavior in water and dimethyl sulfoxide, based on this feature, which could realize the functional applications for recording and erasing information. It is envisioned that these superior performances render the as-prepared organohydrogel suitable to develop future advanced soft electronics with multienvironmental tolerance.
研究领域:
材料科学
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柔性电子学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 1
·132-143
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IF 3.9
Milad Kermani,Jinghua Wu,Zexiao Liu,Fei Zuo,Hua-Tay Lin,Chunfeng Hu,Salvatore Grasso
This work examines the impact of sintering thermal history on kinetics of grain growth for 1264 ppm (0.1 wt%) MgO-doped alumina. Results suggest that sintering with a high heating rate in the order of ∼10 3 °C min −1 retards grain growth rate. By contrast, a slow heating rate of 5°C min −1 resulted in an increase in grain growth constant by a factor of ∼4. The segregation of Mg to grain boundaries, favored by short sintering duration, is considered to be one of the possible factors contributing to the retarded grain growth rate for the rapidly heated compacts. Furthermore, it is proposed that the simultaneous combination of retarded grain boundary migration rate and limited surface-diffusion-driven grain coarsening, promoted by rapid heating, enables pressure-less fabrication of translucent alumina without a need for vacuum or hydrogen atmosphere. In fact, it is demonstrated that weakly translucent alumina can be produced at relatively low temperatures of 1475–1550°C by sintering with a high heating rate (herein, ∼10 3 °C min −1 ) in ambient atmosphere.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2017
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IF 0.963
Lijuan Yang,Yiliang Wang,Xiaohong Peng
Three novel series of transparent fluorinated thermoplastic polyurethane (FTPU) elastomers based on 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate (IPDI), polytetramethylene glycol (PTMG), polycaprolactone (PCL) and 4,4′-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene] bisphenol (BPAF) were synthesized by two-step solution polymerization. The FTPU were characterized by Fourier transform infrared spectrometry (FTIR), UV-Visible spectrometry (UV-Vis), wide angle X-ray diffraction (WAXD), atomic force microscopy (AFM), thermogravimetric analysis (TGA), and mechanical tests. The FTIR results indicate that the micro-phase separation and hydrogen bonding strength increase with increasing fluorine content, which are proved by the results of AFM and WAXD. The UV-Vis tests show high transmittance of FTPU films which is affected by crystallization easily. The TGA and mechanical tests indicate that thermal stability and mechanical properties of FTPU are improved significantly with the introduction of BPAF.
研究领域:
高分子材料科学
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功能高分子
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材料化学
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聚合物表征
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热力学性能
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2025
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IF 3.8
Zihua Lei,Wenjun Yu,Le Fu
Transparent or translucent ceramics typically exhibit inferior mechanical performance, which restricts their wider application. Here, we aim to develop ZrO 2 –SiO 2 –Al 2 O 3 ternary ceramic nanocomposites (TCNCs) that integrate those two often incompatible properties via microstructure engineering. A fixed ratio of 30 mol% SiO 2 was introduced into the ZrO 2 –Al 2 O 3 system, while the ratios between ZrO 2 and Al 2 O 3 were varied. Additionally, different forms of Al 2 O 3 (crystallization or amorphous) were used, resulting in four types of TCNCs. Among the samples studied, the TCNC containing 60 mol% ZrO 2 and 10 mol% amorphous Al 2 O 3 achieved high translucency and remarkable mechanical properties. The TCNC comprised ZrO 2 nanoparticles embedded in SiO 2 glass matrix and Al 2 O 3 glass domains. The superior properties of the TCNC can be attributed to its nanocrystalline-amorphous dual-phase microstructure. For TCNCs utilizing α-Al 2 O 3 submicron particles as the aluminum source, despite their adequate mechanical properties, the agglomeration and lack of densification of these particles resulted in significant light scattering, rending the TCNCs opaque. This study demonstrates that engineering a nanocrystalline-amorphous dual-phase microstructure is an effective strategy to achieve a synergistic combination of robust mechanical properties and high translucence.
研究领域:
材料科学
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陶瓷研究
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jize Wang,Ping Mu,Xiongzhuang Jiang,Shaowen cao,Bin Li,Yong Peng
In this study, we present a transparent perovskite-based photoanode consisting of a CsPbBr3-based photogenerated electric field layer and a Ni-Epoxy/Ni layer with integrated multifunctions of light transmission, sealing, charge conducting, and catalyzing. The Ni-Epoxy/Ni layer successfully constructed longitudinal charge transport channels and provided an interface with active sites, while achieving an average visible transmittance of more than 70%. For photoelectrochemical (PEC) water oxidation at 1.23 VRHE in 0.5 M KOH solution, the maximum photocurrent densities of the photoanode were 17.28 and 5.19 mA cm–2 when light was excited from the FTO and the multifunctional layer side, respectively, based on an actual working area of 2 cm2. The photoanode exhibited a 1450 mV shift of onset potential compared with the multifunctional layer. Due to the existence of a high built-in electric field, bias-free complete PEC water splitting was realized, and the peak photocurrent density was 0.46 mA cm–2. The multifunctional layer’s water resistance increased the photoanode’s working time from less than 1 min to more than 30 min.
研究领域:
材料科学
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光电化学
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太阳能转换
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 19
·3723-3733
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IF 7.571
Qing Hao,Jinghong Wang,Jie Shen,Rong Gu,Yu Rao,Jian Feng,Huanhuan Wang,John L. Brash,Hong Chen
In analogy with adsorbed protein films, we have fabricated a family of 2D nanofilms composed of poly(N-vinyl caprolactam-co-vinylimidazole) (PNVCL) nanogels. NVCL was copolymerized with 1-vinylimidazole (VIM), and then cross-linked with α,ω-dibromoalkanes with 2 to 8 carbons via quaternization to form the nanogels. The swelling ratio of the gels was precisely controlled by regulating the inter-chain spacing of the polymers at the level of the carbon atom chain length of the cross-linker. The short-chain alkanes used are relatively rigid and their dimensions provide an accurate estimate of the chain spacing in the nanogels. It was shown that small differences in the carbon atom number of the cross-linking agent led to significant differences in the mechanical properties of the nanogels, in particular in the softness, deformability, and contact area (in film form), all of which increased with increasing carbon number. Films of the softer gels not only showed good adhesion to a number of substrates, but were also mechanically robust. In addition, the films showed excellent light transmission and nontoxicity to L929 cells. Nanogels of intermediate softness were shown to inhibit the adhesion of bacteria and human umbilical vein smooth muscle cells (HUVSMCs), and to be resistant to the adsorption of the plasma protein fibrinogen, indicating strong anti-biofouling properties. Gels that were either too stiff or too soft showed somewhat weaker anti-fouling activity in terms both of HUVSMCs adhesion and protein adsorption.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
生物材料
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DOI
PubMed
高影响因子
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