ACS Applied Materials & Interfaces
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2024
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IF 8.3
Bailang Zhang,Ting Wang,Mingjie Li,Minghao Mu,Zheng Wang,Yuwei Chen,Chaoxu Li
Biological nanofibrils not only are characteristic of many species of biomasses but also serve as a promising type of sustainable nanomaterials for various applications. However, their production has long relied on an invasive and energy-consuming mechanical shear. A noninvasive and versatile approach remains challenging to exfoliate different types of biomasses into nanofibrils. In this study, we showed a versatile and nonaggressive intercalative deprotonation agent of organic base, which could efficiently deprotonate various biomasses for energy-saving exfoliation and functionalization, including cellulose, chitin, and silk. Both carboxylic nanofibrils and nanofibrils with pristine chemical structures could be produced in high yields through manual shaking or sonication. By further grafting photoresponsive groups via transesterification, intelligent NFs were generated featuring ultraviolet-responsive fluorescence and hydrophilicity. These responsive fluorescence and actuation behaviors promised their potential as green encryption and anticounterfeiting nanomaterials.
研究领域:
材料科学
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生物化学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2022
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IF 18.027
Xinpeng Che,Weihua Zhang,Lifen Long,Xiaofang Zhang,Danfeng Pei,Mingjie Li,Chaoxu Li
Efficient and nondestructive liquid exfoliation of MXene with large lateral size has drawn growing research interest due to its outstanding properties and diverse potential applications. The conventional sonication method, though enabling a high production yield of MXene nanosheets, broke them down into submicrometric sizes or even quantum dots, and thus sacrificed their size-dependent properties, chemical stability, and wide applications. Herein, rigid biological nanofibrils in combination of mild manual shake were found to be capable of peeling off MXene nanosheets by attaching on MXene surfaces and localizing the shear force. With comparison to sonication, this efficient and nondestructive exfoliation approach produced the MXene nanosheets with the lateral size up to 4–6 μm and a comparable yield of 64% within 2 h. The resultant MXene nanosheets were encapsulated with these biological fibrils, and thus enabled super colloidal and chemical stability. A steam generation efficiency of ∼86% and a high evaporation rate of 3.3 kg m–2 h–1 were achieved on their aerogels under 1-Sun irradiation at ∼25 °C. An evaporation rate of 0.5 kg m–2 h–1 still maintained even at the atmospheric temperature of −5 °C. More importantly, an electricity generation up to ∼350 mV also accompanied this solar evaporation under equivalent 5-Sun irradiation. Thus, this fibrous strategy not only provides an efficient and nondestructive exfoliation method of MXene, but also promises synchronization of solar-thermal evaporation and energy harvest.
研究领域:
材料科学
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纳米技术
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能源工程
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生物学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2019
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IF 13.903
Zengbin Wang,Jie Xu,Penggang Wang,Yue Zhang,Jun You,Chaoxu Li
Porous metal foams have been one of the most sought-after materials owing to their combination of bulk metallic characteristics (e.g., thermal/electrical conductivity and ductility) and nanometric size-effect properties (e.g., catalytic reactivity, plasmonic behavior, and high surface area). Traditional sol–gel approaches, though one of the most frequently used method to produce mesoporous metal foams, were hindered for scalable production and wide applications because of its tedious multistep procedure, time-consuming gelation time, and polydisperse pore sizes. Herein, by depositing biological nanofibrils (chitin, cellulose, and silk) on commercial filtration membranes, we report a facile approach to sieve and recycle sub-6 nm nanoparticles of noble metals (Au and Pt) via nonclogging filtration into three-dimensional (3D) networks with interconnected mesopores. The porous networks could withstand air-drying, in contrast to freezing/supercritical drying conventionally used for mesoporous foams preparation. This approach was also applicable to both mesoporous monometallic (Au, Pt) and bimetallic (Au–Pt) foams. Moreover, the resultant mesoporous metallic foams show high porosity up to 90%, homogeneous mesoporous structure, and metallic conductivity up to 104 S/cm. Thus, this rapid and scalable sieving procedure not only offers a possibility of sieving noncloggingly for efficient recovery of metal nanoparticles but also starts a pathway to produce conductive and flexible mesoporous foams applicable in broad fields such as continuous flow catalysis and smart actuating.
研究领域:
材料科学
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2017
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IF 3.531
Agnieszka Rojewska,Anna Karewicz,Karolina Boczkaja,Karol Wolski,Mariusz Kępczyński,Szczepan Zapotoczny,Maria Nowakowska
Novel system based on bionanocellulose modified with carboxymethyl groups (mBNC) and covalently attached hydrogel submicron particles with encapsulated curcumin was prepared and its usefulness for the preparation of bioactive wound dressing materials was demonstrated. In order to obtain a well-controlled delivery system, curcumin was first encapsulated in Pluronic ® P103 micelles and subsequently entrapped in the particles prepared by the extrusion method using commercially available, relatively inexpensive and biocompatible polymers: sodium alginate (ALG) and hydroxypropyl cellulose (HPC). The size of the particles and the feed ratio of curcumin and ALG were optimized during the synthesis in respect with the curcumin loading and release profile. The particles were coated with chitosan and successfully immobilized on the surface of mBNC using EDC/NHC chemistry. The particles attached to the mBNC surface released the curcumin in a sustain, well controlled manner, resembling that of the unbounded particles. Their presence allows for prolonged bioactivity of the potential wound dressing material.
研究领域:
材料科学
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生物医药
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伤口愈合
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）