Journal of Materials Research and Technology-JMR&T
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2022
·
IF 6.267
Yizhuo Xu,Dingyuan Zheng,Xiaojian Chen,Wenrui Yao,Yuning Wang,Zihao Zheng,Haiyan Tan,Yanhua Zhang
To improve the inherent properties of polylactic acid (PLA), cellulose nanocrystals (CNCs) have been picked up as the nanofillers. However, the hydrophilic CNCs show poor compatibility with hydrophobic PLA, which usually fails to improve the performance of PLA. Inspired by mussel, polydopamine (PDA) decorated CNCs (PDA@CNCs) were utilized as nanofillers for PLA modification. With the introduction of PDA grafting on the surface of CNCs, the compatibility of CNCs in the PLA matrix was improved. The PDA acts as the bridge to enhance the interfacial adhesion between CNCs and PLA, improving the mechanical properties of the composite. At low addition level (1 wt%), the obtained composites (PDA@CNCs/PLA) showed enhanced mechanical properties 17.31% and 33.01% increases for tensile strength and elongation at break, respectively. In addition, the existence of PDA with UV radiation absorption performance induces PDA@CNCs/PLA UV-shielding property, which could undoubtedly extend the cycle time of the product and has the potential to be used in packaging for light-sensitive foods, pharmaceuticals, etc. The mussel-inspired PDA decoration of CNCs by this work provided a new strategy for the enhancement of the inherent properties of PLA.
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ACS Omega
·
2022
·
IF 4.132
Jiamei Xiang,Ruixue Li,Xiang Long,Shaogui Wu,Jiayang Wang,Zhuo Wang
In this work, ultrabright fluorescent carbon dots (U-CDs) were synthesized by using a strict twice iterative optimization strategy. Their relative photoluminescence (PL) quantum yield is close to 100%, exceeding most of the reported fluorescent CDs and greatly boosting the practical applications of fluorescent CDs in many fields. Then serving as fluorescent anti-counterfeiting ink was taken as an example to briefly introduce the application of the U-CDs. The PL emission of the U-CDs is quenched at the range of pH < 4 or pH > 11 and restored at the range of pH = 5–10. This pH-sensitive PL feature allows the U-CDs to be used as fluorescent ink for pH and UV dual information encryption. The written or printed information is invisible under daylight but visible under UV light. After acid treatment or alkali treatment, the information is invisible even under a UV lamp but visible after neutralization treatment. This work provides a standardized scheme for optimizing the synthesis conditions of fluorescent CDs and paves the way for large-scale production of high-performance fluorescent CDs.
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PubMed
高影响因子
ChemPhotoChem
·
2022
·Vol. 6
·期 5
·e202100208
·
IF 3.679
Tian-Jiao Lou,Jing-Qi Wang,Wenyi Wang,Tao Wang,Peng-Fei Qian,Ze-Long Bao,Li-Chao Jing,Xiao-Tong Yuan,Hong-Zhang Geng
Graphical Steps in the right direction : ZnO/CNT (carbon nanotube) heterojunctions were prepared by non-covalent modification of CNTs using a simple spraying method and subsequent annealing. This heterojunction was constructed without affecting the film sheet resistance and transmittance, and the non-covalently modified CNT showed a substantial improvement in the recession time relative to the pristine CNT and improved the device with higher photoresponsivity and detectivity at 365 nm. Flexible electronic devices have received significant attention in recent years as a result of their flexibility and portability. Carbon nanotube (CNT) films could serve as a promising material for photodetection because of their broad absorption spectral coverage. In this research, vertical ultraviolet (UV) to visible (UV/Vis) detectors based on tannic acid functionalized carbon nanotube/zinc oxide (TCNT/ZnO) heterojunctions were prepared by a simple spraying method. The TCNT electrode had excellent photoelectric properties with a sheet resistance of 40.6 Ω/sq and transmittance of 80.4 % at 550 nm, and the resulting TCNT/ZnO device could achieve photocurrent of 3.0 mA at 360 nm in the UV range, a recession time of 8.05 s, photoresponsivity of 7.12 A/W, and detectivity of 25.2×10 11 Jones. As a comparison, for the pure CNT electrode with a sheet resistance of 45.5 Ω/sq and transmittance of 79.6 % at 550 nm, the CNT/ZnO photocurrent was only 0.6 mA at 360 nm, with a recession time of 17.25 s, photoresponsivity of 1.00 A/W, and detectivity of 3.4×10 11 Jones. The prepared device was also able to operate stably after 1000 mechanical bending tests and maintained more than 95 % detectivity, providing a feasible path for the generation of carbon nanotube based photodetector devices.
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ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Min Zhang,Qili Yang,Tianshuo Hu,Lele Tang,Yonghao Ni,Lihui Chen,Hui Wu,Liulian Huang,Cuicui Ding
Recently, versatile hydrogels with multifunctionality have been widely developed with emerging applications as wearable and implantable devices. In this work, we reported novel versatile hydrogels by self-catalyzing the gelation of an interpenetrating polymer network consisting of acrylic acid (AA) monomers and GA-modified collagen (GCOL) in situ decorated silver nanoparticles (AgNPs). The resultant hydrogel, namely AgNP@GCOL/PAA, has many desirable features, including good mechanical properties (such as 123 kPa, 916%, and 1961 J m−2 for the fracture stress, strain and tearing energy) that match with those of animal skin, excellent self-healing performance, favorable conductivity and strain sensitivity as a flexible biosensor, and excellent antibacterial and anti-UV properties, as well as the strong adhesiveness on skin. Moreover, AgNP@GCOL/PAA showed excellent biocompatibility via in vitro cell culture. Remarkably, AgNP@GCOL/PAA displayed superior hemostatic properties with sharply decreasing blood loss for a mouse liver incision, closely related to its strong self-adhesion which produced anchoring strength to the bleeding site and thus formed a network barrier with liver tissue. This study provides new opportunities for the facile preparation of widely used multifunctional collagen-based hydrogels based on a simple pyrogallol-Ag system.
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高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 4
·2699-2709
·
IF 6.123
Cui Yifan,Zheng Guolin,Jiang Zhe,Zhou Yu,Wang Qiang,Zhou Man,Wang Ping,Yu Yuanyuan
The development and improvement of fabric-based stretchable strain sensors play a vital role in constructing wearable devices. In this paper, a flexible and sensitive cotton-based strain sensor for human motion monitoring was successfully developed by facile LBL-ESA (layer-by-layer electrostatic self-assembly) of chitosan (or chitosan quaternary ammonium salt) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), abbreviated to PEDOT:PSS. Chemical structure and microscopic morphology of the cotton fabric coated with PEDOT:PSS were measured using X-ray photoelectron spectroscopy, Raman spectroscopy, Scanning electron micrographs, Fourier transform infrared spectrometer and color strength (K/S value). Electrical conductivity of the fabric changed with the “odd–even” oscillations of K/S value of the cotton fabric. Furthermore, cotton fabric alternately deposited with five cycles reached the highest electrical conductivity (0.335 mS/cm). Meanwhile, the fabric presents excellent UV protection capacity (maximum UPF value of 385.07), which was 24.4 times of pristine cotton fabric (15.76). In addition, cotton fabric strain sensor coated by PEDOT:PSS could effectively detect finger and knee movements of humans, showing a promising prospect in the field of human rehabilitation training, real-time monitoring, and gesture recognition due to its good stability and being highly responsive.
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Advanced Optical Materials
·
2023
·Vol. 11
·期 15
·2300303
·
IF 9
Dangli Gao,Zhigang Wang,Qing Pang,Qingqing Kuang,Feng Gao,Xiangyu Zhang,Sining Yun,Xiaojun Wang
UV-charged optical stimulated single-band phosphors are being used for single-level optical data storage because of their ability to easily write/read information by light. In contrast, UV–visible–NIR rechargeable optical stimulated double-band phosphor is urgently necessary for multiplexed high-throughput optical data storage. Here, the authors design and synthesize Mn 2+ ,Cr 3+ co-doped zinc gallate storage persistent phosphor that exhibits strong red-green bicolor persistent luminescence (PersL). Besides the traditional ultraviolet charging, the phosphor can be effectively and repeatedly charged by using visible and NIR light by one- or two-photon process. Interestingly, red and green PersL exhibit the opposite temperature dependence, which is extremely important for multilevel information storage. The mechanism of temperature-dependent PersL intensity based on different trap types and filling approaches for the double luminescence centers is proposed. The phosphor promises a sophisticated application in optical data storage of wavelength multiplexing.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 41
·e54523
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IF 3
Guiyou Jiang,Song Wu,Wei Yan,Tian Tian,Yang Li,Youwei Liao,Yan Yang
This paper presents a viable coating design for the production of waterborne coatings using PUA, Silicone-modified-PUA, Al-SiO 2 , and PTFE as key ingredients. The coatings are prepared through an air compression spraying technique followed by a photocuring procedure. The resulting PUA/Silicone-modified-PUA/Al-SiO 2 /PTFE coating exhibits exceptional properties including high hardness, low surface tension, and a low coefficient of friction. Experimental findings reveal noteworthy characteristics of the coating. It possesses a gloss level of 4–6°, a hardness of 492.69 N/mm, an elasticity modulus of 11469.94 MPa, a surface roughness of 0.87 μm, a dynamic coefficient of friction of 0.125 μN, and a surface tension of 0.4967 mN/m. To assess its performance, the coating underwent rigorous tests such as the CS-5 Wool Touchpad Shinning Friction test with a 200 g load over 250,000 cycles. It exhibited minimal changes in gloss (≤2°) and color difference (∆E ≤ 0.75). Additionally, the CS-10 abrasive head Optical Surface Taber Abrasion Resistance test was conducted using a 500 g load for 10 cycles, resulting in a Class 1 rating, and after 100 cycles, it achieved a Class 3 rating. This demonstrates its remarkable resistance to tribological environments, enduring tapping, touching, and scraping by fingers over extended periods.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Shiyue Hu,Junhong Liu,Xuanlan Luo,Qiqi Shen,Yu Qin,Haikun Hu,Jinhai Yuan,Shuangkou Chen,Di Xu
Currently, photocatalytic degradation is a fascinating technology due to its capability to treat escalating environmental problems by degrading chemicals like dyes and pharmaceuticals from wastewater. Herein, the hexagonal prism GQDs/h-MoO 3 composite photocatalyst was fabricated through a facile hydrothermal approach. The synthesized samples were identified by XRD , SEM, FT-IR, XPS , UV-Vis DRS , and PL technologies to study the crystal structure, morphology, surface chemical composition , and optical properties . The preparation circumstances of binary compounds, such as different GQDs (Graphene quantum dots) loading amounts, precursor solution pH, hydrothermal temperature, and hydrothermal time were optimized, also, and the photocatalytic activity of materials is determined by photodegradation of Methylene Blue in this approach, which systematically investigated the impact of operational conditions on the efficiency of the photocatalytic reaction. The results revealed that 10GQDs/h-MoO 3 has the best photocatalytic performance among competitors, which exhibited a high photodegradation efficiency (85.58%) of MB, and the rate was approximately 2.13 times greater than pristine h-MoO 3 . Moreover, the PL and EIS measurements proved the outstanding separation and migration ability of the photo-excited carriers of composite, which was attributable to the fact that GQDs can serve as electron transporters and acceptors to induce electron-hole separation efficiently. Finally, the free radical scavenging experiments confirmed that the primary active species was h + in the photocatalytic process, as well as a potential explanation for the improved photocatalytic activity of GQDs/h-MoO 3 photocatalysts was proposed.
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CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Yuerong Yang,Yu Lu,Yinchuan Liu,Yu Pan,Hongjuan Ma,Linjuan Huang,Zhongfu Wang
Yak milk (YM) has higher protein content than other bovine milk (BM) varieties. The bioactivity of milk glycoproteins is related to N / O -glycans. We qualitatively and quantitatively compared the N / O -glycome of YM and BM glycoproteins using stable isotope labeling combined with hydrophilic interaction chromatography and electrospray ionization mass spectrometry. We identified 79 and 78 N -glycans in YM and BM, respectively. Two N -glycans (H4N5F1A1; H5N4F1) were exclusive to YM. The content ratios of different types of N -glycans differed significantly between YM and BM, with sialylated N -glycans 2.33 times more abundant in YM. Five and seven O -glycans were detected in YM and BM, respectively. Two O -glycans (H1N2; H1N2A1) were exclusive to BM. The bi-sialylated O -glycan, H1N1A2, accounted for 56.1% of O -glycans in YM; it was 5.97 times more abundant in YM than in BM (equal volume basis). This study provides a theoretical basis for the future utilization of YM as a functional food.
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高影响因子
Materials
·
2021
·Vol. 14
·期 22
·7002
·
IF 3.623
Jiayi Chen,Kuang Wang,Jialong Tian,Wenhui Yu,Yujie Chen,Na Li,Zhenming Qi,Chunxia Wang
In this work, a visible-light-driven BiOCl/Bi2WO6photocatalyst was obtained via a facile hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), ultraviolet/visible light diffuse reflection spectroscopy (UV/Vis), and photocurrent (PC). BiOCl/Bi2WO6was modified with (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride to obtain the cationized BiOCl/Bi2WO6. Cotton fabric was pretreated with sodium hydroxide (NaOH) and sodium chloroacetate solution to obtain carboxymethylated cotton fabric, which was further reacted with cationized BiOCl/Bi2WO6to achieve finished cotton fabric. The cotton fabrics were characterized by Fourier-transform infrared spectroscopy (FT-IR), XRD, SEM, and EDS. The photocatalytic activity of the BiOCl/Bi2WO6photocatalyst and cotton fabrics was assessed by photocatalytic degradation of MB (methylene blue) solution under simulated visible light. The self-cleaning property of cotton fabrics was evaluated by removing MB solution and red-wine stains. Results revealed that the coated cotton fabrics exhibited appreciable photocatalytic and self-cleaning performance. In addition, anti-UV studies showed that the finished cotton fabrics had remarkable UV blocking properties in the UVA and UVB regions. Therefore, the finished cotton fabric with BiOCl/Bi2WO6can provide a framework for the development of multifunctional textiles.Keywords:BiOCl/Bi2WO6;cotton fabric;UV shielding;photocatalysis;self-cleaning
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高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Lei Wang,Xiaodong Liu,Peng Qi,Jun Sun,Shengling Jiang,Hongfei Li,Xiaoyu Gu,Sheng Zhang
The chitosan (CS) transparent film has attracted much attention in food and medicine packaging areas due to their biodegradability and good availability. A novel carbon quantum dots compound containing nitrogen and phosphorus (NP-CQDs) was obtained by reacting citric acids , with urea and phytic acids . The density of the film was increased, and the water vapor permeation was reduced by the presence of NP-CQDs. The introduction of 4 wt% NP-CQDs increased the water contact angle of the CS film from 79.2° to 105.8°. The shielding on UV-A and UV-B transmittance was increased with the NP-CQDs loading. The film containing 4 wt% NP-CQDs blocked more than 90.2% UV-A and 96.5% UV-B; however, it only blocked 26.8% visible light. It also exhibited better antibacterial activity to both E . coli and S . aureus than the control CS film. This work provided a feasible way to prepare multifunctional bio-safe film.
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ACS Applied Electronic Materials
·
2023
·
IF 4.7
Zhiyuan Chen,Peipei Han,Wenhui Chen,Zhi Wan,Jizhou Yang,Zhigang Liu,Peng Hu,Feng Teng,Haibo Fan
In recent years, Ga2O3 flexible solar-blind ultraviolet photodetectors (UVPDs) are gradually becoming the focus of research and the industry because of their excellent wearability, low manufacturing cost, portability, large area compatibility, and high scalability. However, the crystallization temperature required for high-quality α-phase Ga2O3 films exceeds the heat resistance of most flexible materials, so the growth of Ga2O3 films on flexible substrates is a very big challenge. In this study, a highly ordered α-Ga2O3 nanorod array and flexible solar-blind UV PDs with excellent performance were successfully prepared on a flexible titanium (Ti) substrate at 500 °C by a simple water bath heating method. When irradiated by 254 nm ultraviolet light, the α-phase Ga2O3 flexible photodetector exhibits an excellent self-power optical response at 0 V bias and exhibits excellent photoelectric performance with a responsivity of 15.3 mA/W, a fast rise and fall time of 0.104 and 0.077 s, a photocurrent density of 45.7 μA/cm2, and a high detectivity of 13.8 × 109 Jones. Bending and repeating experiments demonstrated that the detector had high stability. This study provides a simpler and less expensive method for the preparation of flexible self-powered α-Ga2O3 solar-blind UV photodetectors.
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高影响因子
危险品化学品经营许可证（带存储）