CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Juan Long,Zhiqiang Li,Tuhua Zhong
Surface functionalization of cellulose nanofibrils (CNF) is crucial for expanding their practical application. However, most functionalization processes are complicated and laborious. Herein, this work presents a facile surface engineering strategy to create a range of functionalized CNF via thiol-ene click reaction. Initially, clickable CNF was produced by grafting a compound with both carboxylate- and norbornene groups onto bamboo cellulose via norbornene-dicarboxylic anhydride esterification followed by homogenization. The introduction of negatively charged carboxylates facilitated nanofibrillation, resulting in CNF with a diameter of 3 nm and an aspect ratio of up to 600. The introduction of norbornenes enabled diverse functionalization of CNF through click reaction. Subsequently, hexadecanethiol successfully clicked with norbornene-grafting CNF, enhancing its hydrophobicity and dispersion in organic solvents. 7-mercapto-4-methyl coumarin was also able to click with norbornene-grafting CNF, yielding fluorescence-labeled CNF while maintaining excellent aqueous dispersibility. The fluorescence-labeled CNF was demonstrated to be utilized as an eco-friendly sensor for the detection of Fe 3+ ions. Additionally, it could be converted into fluorescent films or intelligent inks suitable for anti-counterfeiting purposes. This study demonstrates that the proposed surface engineering strategy provides an effective approach for producing clickable CNF and fabricating cellulosic materials with diverse functionalities that meet the demands of various applications.
研究领域:
材料科学
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纳米技术
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Hongyu Zeng,Ping Wang,Lizhu Liang,Hao Hu,Ye Peng,Xuelian Li,Changkun Liu
In recent years, offshore oil leakage incidents have occurred relatively frequently and it has been a challenge to effectively recover the oil due to its high viscosity. Herein, a novel superhydrophobic cotton fabric with a photothermal conversion effect for efficient separation of crude oil was prepared by a facile and inexpensive vapor deposition method. After the cotton fabric adsorbs Fe 3+ ions, stearic acid (SA) with low surface energy is introduced into the fabric. Then the pyrrole monomers were polymerized to polypyrrole (PPy) by Fe 3+ ions through vapor deposition method to obtain a fabric with photothermal properties and superhydrophobicity. The modified fabric showed good abrasion resistance , acid/alkali resistance, and self-cleaning properties. In addition, the modified fabric exhibited excellent photothermal conversion performance, and its surface temperature was able to increase from 30.0 °C to 59.5 °C in 2 min, and reached 68.2 °C in 5 min under simulated sunlight. Finally, three kinds of oil-water separation methods were adopted to separate oil from water with different viscosities, and all of them showed high separation efficiency, with the maximum reaching 99.4%. Under the simulated sunlight, the modified fabric could reduce the crude oil viscosity through photothermal conversion effect, so as to improve the efficiency of selectively absorbing crude oil from water, which increased from 83.2% to 91.8%.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2024
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IF 3.5
Mamuhe Yeerlan,Meng Zhang,Pengpeng Dai
Fe 3+ ions as near-infrared (NIR) activators are emerging as an alternative to Cr 3+ . 1–5 However, it is a challenge to develop Fe 3+ -activated NIR phosphors featuring tunable optical properties, high efficiency, and thermal stability. Herein, we present a series of near-unity internal quantum efficiency (IQE), wavelength-tunable and thermal stability NIR-emitting phosphors Sr 2− y Ca y Sc 1− x SbO 6 : x Fe 3+ (S 2− y C y S 1− x S: x Fe 3+ ). Sr 2 ScSbO 6 :1%Fe 3+ (SSS:1%Fe 3+ ) phosphor shows broadband NIR emission at 904 nm and near-unity IQE under excitation at 300 nm. Experimental and theoretical calculation results demonstrate that introduced Ca ions could increase the bandgap value and Debye temperature (Θ D ) of host from E g = 3.702 eV, Θ D = 609 K of y = 0 to E g = 3.801 eV, Θ D = 692 K of y = 2. Significantly, the resultant S 2− y C y S 1− x S:1%Fe 3+ NIR phosphors show wavelength-tunable emission from 904 to 952 nm and high IQE of 84.6%–97.5% as well as enhanced thermal stability ( I 423K / I 298K = 76.9%) of Ca 2 ScSbO 6 :1%Fe 3+ (CSS:1%Fe 3+ ) in comparison with that ( I 423K / I 298K = 70.6%) of pristine sample. We fabricated an NIR light-emitting diodes (LED) device by using CSS:1%Fe 3+ NIR phosphors with ultraviolet LED chip and demonstrated its potential applications in anticounterfeiting, information encryption, and night vision.
研究领域:
材料科学
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光学
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光子学
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固体物理
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Jia Chen,Yu Xia,Qian Lan,Min Hu,Yueying Xu,Quanxin Wu,Xinguang Liu,Yun Liu
Uncontrolled hemorrhage is a main cause of pre-hospital death. Given the importance of hemostatic wound dressings in pre-hospital emergency treatment, novel composite materials are required for fast hemostasis, synergistic bacterial ablation with negligible resistance and wound healing acceleration. Herein, multifunctional SCTF cryogels were fabricated by the simultaneous cross-linking of sodium alginate (SA) and tannic acid (TA) with Fe 3+ ions. As a result, the prepared SCTF cryogels consisted of Fe 3+ /TA-based metal phenolic networks (MPNs) and Fe 3+ /SA-based 3D skeleton for collagen (CA). MPNs endowed the cryogels with photothermal effect, photothermal-enhanced Fenton activity and pH/photothermal dual-responsive release property of TA and Fe 2+ , which were beneficial for the antibacterial capacity. Due to the intrinsic high porosity, in vitro and in vivo assays demonstrated that SCTF cryogels possessed good hemostatic capacity. Moreover, the synergistic photothermal therapy (PTT), chemodynamic therapy (CDT) and pH/photothermal responsive chemo-therapy dramatically enhanced the bactericidal efficacy of SCTF cryogels both in vitro and in vivo . Eventually, their outstanding healing-accelerating effects were confirmed via animal experiments, which were attributed to the presence of CA and TA. Therefore, the developed composite materials could offer new strategy on exploiting multifunctional wound dressing for clinical applications in the future.
研究领域:
材料科学
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生物材料
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生物医学工程
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伤口愈合
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抗菌治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Xiangping Wen,Lihong Shi,Guangming Wen,Yanyan Li,Chuan Dong,Jun Yang,Shaomin Shuang
An extreme green and economical strategy for producing fluorescent carbon nanodots (CDs) by pyrolysis and microwave treatment of cotton is proposed for the first time. The fabricated CDs exhibit exceptional advantages including high fluorescent quantum yield , excellent biocompatibility, low-toxicity, and satisfactory chemical stability. Depending on these superior properties, the CDs have been applied in multicolor imaging, patterning, and sensing, respectively. According to the confocal fluorescent imaging of human uterine cervical squamous cell carcinoma cells, the CDs can penetrate into the cell and enter the cytoplasm and nucleus, suggesting pleasurable promise for bioimaging . Additionally, the obtained CDs have been used as fluorescent inks for drawing luminescent patterns, showing favorable application in anti-counterfeit and optoelectronic dimensions. Most strikingly, the as-prepared CDs can sensitively and selectively detect Fe 3+ ions in a linear range of 5.0 × 10 −8 –1.0 × 10 −5 M with a detection limit as low as 2.7 × 10 −8 M.
研究领域:
材料科学
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纳米技术
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生物医学工程
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分析化学
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Chao Ma,Jie Wei,Bowen An,Yilei Han,Pusen Cao,Shifeng Zhang,Yuxia Chen,Yong Guo
Designing sustainable natural biomass adhesives with high bonding performance (particularly cold-pressing bonding strength) while maintaining excellent coating, mildew resistance, and flame-retardant properties is important for developing formaldehyde-free wood adhesives. Inspired by the wet adhesion system of scallops, we developed a novel bionic soybean meal (SM) adhesive with excellent bonding strength. In this adhesive system, keratin (KT) acts as a source of disulfide bonds (S–S) contributing formation/exchange donor, while Fe 3+ ions formed dynamic coordination bonds with carboxyl groups and tannic acid, resulting in strong adhesion. The multiple crosslinking network system synergistically enhanced the adhesion, resulting in a cold-pressing bonding strength of 582.4 kPa, which is an improvement of 171.3 %. The dry and wet bonding strength was 3.19 MPa and 1.34 MPa, which was increased to 73.4 % and 97.1 % compared to the SM adhesive, respectively. Additionally, the adhesive exhibited desirable mildew resistance (under storage for 15 days) and superior flame resistance, which was attributed to the synergistic inhibition by the metal cations and phenolic hydroxyl groups. The design of this bionic system offers a novel approach for developing environmentally friendly wood adhesives.
研究领域:
材料科学
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化学工程
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环境科学
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仿生学
✓ 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）