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Ren Y, Zhu D, Shi T, Song B, Qi J, Zhang L, Yu Y. Composite Foams of the Graphitic Carbon Nitride@Carbon Nanofibrils Conferred a Superamphiphilic Property and Reinforced Thermal Stability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15122-15130. [PMID: 37828682 DOI: 10.1021/acs.langmuir.3c02244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Herein, we demonstrated the preparation of novel three-dimensional (3D) superamphiphilic g-C3N4@carbon nanofibers foam (g-C3N4@CNFs) via a two-step approach: liquid nitrogen treatment-freeze-drying; the foams possessed good thermal stability. In this approach, melamine acted as a nitrogen source, and nanofibrillated cellulose (NFCs) functioned as a 3D skeleton. The thermal stability of the as-prepared g-C3N4@CNFs-3 foam was much higher than that of g-C3N4@CNFs-1, as indicated by thermogravimetric data, including an increase of the onset weight loss point (Tonset) by 238.6 °C and an improvement of the maximal weight loss rate (Tmax) by 258.8 °C. The combination of g-C3N4 with CNFs conferred a reduction in the heat release rate (ca. -86%) and the total heat release (ca. -75%). Furthermore, the composition of the hydrophilically oxygenated functional groups and hydrophobic triazine domains in g-C3N4@CNFs rendered it a unique amphiphilic property (contact angle close to 0° within 1.0 s for water and 0° within 12 ms for hexane). A high storage capacity for water and various organic solvents of the superamphiphilic g-C3N4@CNFs foam was found, up to 40-50 times its original weight. The discovery of these superamphiphilic foams is of great significance for the development of superwetting materials and may find their applications in oil emulsion purification and catalyst support fields.
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Affiliation(s)
- Yanbiao Ren
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, Shandong, P. R. China
| | - Dandan Zhu
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, Shandong, P. R. China
| | - Tiesheng Shi
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, Shandong, P. R. China
| | - Bo Song
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, Shandong, P. R. China
| | - Jingbo Qi
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, Shandong, P. R. China
| | - Lincai Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, Shandong, P. R. China
| | - Yanxin Yu
- College of Chemistry, Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, Shandong, P. R. China
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Wang X, Yang X, Hu Y, Guo S, Lu J. Bionic Assembly of Layered Double Hydroxides Nanosheets and Positively Charged Micelles by Counterions Balance and Their Selective Detection of Mannose. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14686-14694. [PMID: 36437733 DOI: 10.1021/acs.langmuir.2c02225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The selective detection of mannose is significant for tumor early diagnosis. However, current methods for detecting mannose are expensive and time-consuming, limiting their application. In this paper, we have obtained a 25-layer positively charged micellar/LDHs nanocomposite film system by electrostatic layer-by-layer assembly with reference to the unique properties of homogeneous charge ion attraction and charge overcompensation in biomolecules: hexadecyl trimethylammonium bromide (CTAB) was used to coat neutral molecules of fluorescein (FLU) to form (FLU@CTAB) cationic micelles, which were electrostatically assembled with laminate positively charged layered double hydroxides (LDHs) nanosheets to form (FLU@CTAB/LDHs)n ultrathin films (UTFs) by the layer-by-layer electrostatic assembly, where the mediating role of the Br- counteranion had a profound effect on the success of the assembly. Moreover, compared to pure FLU solution, the fluorescence intensity and the lifetime of (FLU@CTAB/LDHs)20 UTFs were enhanced by 1.6 and 2 times, respectively. (FLU@CTAB/LDHs)20 UTFs exhibited selective detection for d-mannose with a detection limit of 0.05 mg·mL-1. Therefore, the (FLU@CTAB/LDHs)n UTFs can be a novel biosensor. Compared to conventional powder sensors, (FLU@CTAB/LDHs)n thin-film fluorescent sensors are more promising for device implementation. Moreover, the design strategy of positively charged micellar/LDHs nanocomposite systems breaks the current limitation that LDHs can only be assembled with anions or neutral molecules and extends the scope of counterion-mediated host-guest to the nanosheet-micellar system.
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Affiliation(s)
- Xiaoyan Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beisanhuan East Road 15, Beijing, 100029, China
| | - Xueting Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beisanhuan East Road 15, Beijing, 100029, China
| | - Yuehua Hu
- Shanghai Research Institute Sinopec Lubricant, 455 Gaoyang Road, Shanghai, 200080, China
| | - Shuaitian Guo
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beisanhuan East Road 15, Beijing, 100029, China
| | - Jun Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beisanhuan East Road 15, Beijing, 100029, China
- Beijing Advanced Innovation Center for Soft Mater Science and Engineering, P.O. Box 98, Beisanhuan East Road 15, Beijing, 100029, China
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Deng Y, Guan Q, He L, Li J, Peng L, Zhang J. The photothermal stability of CNFs/ZnAl-LDHs composited films: Influence of the crystal morphology of ZnAl-LDHs. Carbohydr Polym 2021; 263:117981. [PMID: 33858576 DOI: 10.1016/j.carbpol.2021.117981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/24/2021] [Accepted: 03/18/2021] [Indexed: 01/09/2023]
Abstract
The existence of hydroxyl and carboxyl groups makes the photothermal stability of cellulose nanofibers (CNFs) poor and thus limits its scale application. This problem could be solved by doping layered double hydroxides (LDHs) nanopowders with opposite charge on the surface of CNFs. This work mainly focused on investigation of the influence of the crystal morphology of the inorganic ultraviolet shielding agent (i.e. ZnAl-LDHs) on the thermal stability of CNFs/ZnAl-LDHs composited films. The results showed that the morphology of LDHs was positively correlated with the photothermal stability of CNFs-based films. Specially, the ZnAl-LDHs with uniform crystal morphology could be prepared by controlling the molar ratio of Zn/Al at 3:1 and thus enhance the photothermal stability of CNFs-based films without any serious light transmittance deteriorating after doping. This work provided a practical and effective way for preparation of photothermal-stable CNFs-based transparent films for industrial application in the fields of photonics and electronics.
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Affiliation(s)
- Yuan Deng
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China
| | - Qingqing Guan
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China
| | - Liang He
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong, 510640, China.
| | - Jing Li
- School of Environmental and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, 310023, China.
| | - Lincai Peng
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China
| | - Junhua Zhang
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan, 650500, China
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Lu Z, Huang J, E S, Li J, Si L, Yao C, Jia F, Zhang M. All cellulose composites prepared by hydroxyethyl cellulose and cellulose nanocrystals through the crosslink of polyisocyanate. Carbohydr Polym 2020; 250:116919. [DOI: 10.1016/j.carbpol.2020.116919] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 08/04/2020] [Accepted: 08/05/2020] [Indexed: 12/16/2022]
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Abstract
Layered Double Hydroxides (LDHs) are a relevant class of inorganic lamellar nanomaterials that have attracted significant interest in life science-related applications, due to their highly controllable synthesis and high biocompatibility. Under a general point of view, this class of materials might have played an important role for the origin of life on planet Earth, given their ability to adsorb and concentrate life-relevant molecules in sea environments. It has been speculated that the organic–mineral interactions could have permitted to organize the adsorbed molecules, leading to an increase in their local concentration and finally to the emergence of life. Inspired by nature, material scientists, engineers and chemists have started to leverage the ability of LDHs to absorb and concentrate molecules and biomolecules within life-like compartments, allowing to realize highly-efficient bioinspired platforms, usable for bioanalysis, therapeutics, sensors and bioremediation. This review aims at summarizing the latest evolution of LDHs in this research field under an unprecedented perspective, finally providing possible challenges and directions for future research.
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