Preparation of water dispersible and biocompatible nanodiamond-poly(amino acid) composites through the ring-opening polymerization

Xü, Dong; Zhang, Qin; Huang, Qiang; Huang, Hongye; Tian, Jianwen; Jiang, Ruming; Wen, Yuanqing; Zhang, Xiaoyong; Wei, Yen

doi:10.1016/j.msec.2018.05.053

Cited by 16 publications

(4 citation statements)

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“…Polymeric materials are good carriers for incorporating or covering the functional agents (nanofillers) for achieving new physicochemical properties [12]. They can enhance the optical and mechanical properties, biocompatibility, antibacterial activity, or water stability of the resulting materials [13]. For example, Beek et al obtained composites based on ZnO nanoparticles and nanorods with conjugated polymer (MDMO-PPV) for potential application in solar cells [14].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

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In this study, GNF@ZnO composites (gelatin nanofibers (GNF) with zinc oxide (ZnO) nanoparticles (NPs)) as a novel antibacterial agent were obtained using a wet chemistry approach. The physicochemical characterization of ZnO nanoparticles (NPs) and GNF@ZnO composites, as well as the evaluation of their antibacterial activity toward Gram-positive (Staphyloccocus aureus and Bacillus pumilus) and Gram-negative (Escherichia coli and Pseudomonas fluorescens) bacteria were performed. ZnO NPs were synthesized using a facile sol-gel approach. Gelatin nanofibers (GNF) were obtained by an electrospinning technique. GNF@ZnO composites were obtained by adding previously produced GNF into a Zn2+ methanol solution during ZnO NPs synthesis. Crystal structure, phase, and elemental compositions, morphology, as well as photoluminescent properties of pristine ZnO NPs, pristine GNF, and GNF@ZnO composites were characterized using powder X-ray diffraction (XRD), FTIR analysis, transmission and scanning electron microscopies (TEM/SEM), and photoluminescence spectroscopy. SEM, EDX, as well as FTIR analyses, confirmed the adsorption of ZnO NPs on the GNF surface. The pristine ZnO NPs were highly crystalline and monodispersed with a size of approximately 7 nm and had a high surface area (83 m2/g). The thickness of the pristine gelatin nanofiber was around 1 µm. The antibacterial properties of GNF@ZnO composites were investigated by a disk diffusion assay on agar plates. Results show that both pristine ZnO NPs and their GNF-based composites have the strongest antibacterial properties against Pseudomonas fluorescence and Staphylococcus aureus, with the zone of inhibition above 10 mm. Right behind them is Escherichia coli with slightly less inhibition of bacterial growth. These properties of GNF@ZnO composites suggest their suitability for a range of antimicrobial uses, such as in the food industry or in biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Gelatin-ZnO Nanofibers for Antibacterial Applications

et al. 2020

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“…As shown in Figure 3, the two samples of the lignin sulfonate and the lignin/cellulose hydrogel show different thermal cleavage properties. LS begins to depolymerize and decompose the small molecules on its surface after 150 • C, and the most of the lost weight occurs at 261 • C. The lost weight of LS at 200-400 • C is caused by the separation of dopants and the departure of oligomers or byproducts (p-diphenols and quinones) [37,38]. The pyrolysis of the LCA is mainly separated into three steps.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Preparation and Adsorption Properties of Lignin/Cellulose Hydrogel

Chen

et al. 2023

Materials

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With the development of global industry, industrial wastewater pollution has caused serious environmental problems, and the demand for green and sustainable adsorbents is increasingly strong in the society. In this article, lignin/cellulose hydrogel materials were prepared using sodium lignosulfonate and cellulose as raw materials and 0.1% acetic acid solution as a solvent. The results showed that the optimal adsorption conditions for Congo red were as follows: an adsorption time of 4 h, a pH value of 6, and an adsorption temperature of 45 °C. The adsorption process was in line with the Langmuir isothermal model and a quasi-second-order kinetic model, which belonged to single molecular layer adsorption, and the maximum adsorption capacity was 294.0 mg/g. The optimal adsorption conditions for Malachite green were as follows: an adsorption time of 4 h, a pH value of 4, and an adsorption temperature of 60 °C. The adsorption process was consistent with the Freundlich isothermal model and a pseudo-second-order kinetic model, which belonged to the chemisorption-dominated multimolecular layer adsorption with the maximum adsorption capacity of 129.8 mg/g.

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“…27 LS weight loss occurs mainly at 261 C, while the weight loss between 200 C and 400 C is caused by the detachment of dopants and the departure of oligomers or by-products (p-diphenol and quinone). 28,29 In comparison, PANI has two signicant weight losses at 266 C, 535 C, and LS/PANI composites, on the other hand, were nearly at in the 266 C to 535 C intervals, showing different degradation characteristics from PANI, and the ligninsulfonatedoped composites had higher crosslinking and better thermal stability than the original ligninsulfonate. The weight loss above 500 C is due to the rapid decomposition of the PANI backbone.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%