scholarly journals Development of Nanocomposite Film Comprising of Polyvinyl Alcohol (PVA) Incorporated with Bacterial Cellulose Nanocrystals and Magnetite Nanoparticles

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1778
Author(s):  
Naphat Usawattanakul ◽  
Selorm Torgbo ◽  
Prakit Sukyai ◽  
Somwang Khantayanuwong ◽  
Buapan Puangsin ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Magnetite Nanoparticles ◽  
Cellulose Nanocrystals ◽  
Fe3o4 Nanoparticles ◽  
Nanocomposite Film ◽  
Xrd Analysis ◽  
Poly Vinyl Alcohol ◽  
Characteristic Functional ◽  
Tem Analysis ◽  
Co Precipitation

Nanocomposite film of poly(vinyl alcohol) (PVA) incorporated with bacterial cellulose nanocrystals (BCNCs) and magnetite nanoparticles (Fe3O4) is reported in this study. The BCNC-Fe3O4 nanoparticles and PVA film was prepared by in situ synthesis technique using chemical co-precipitation. Different concentrations of BCNC-Fe3O4 (20%, 40% and 60% w/w) were mechanically dispersed in PVA solution to form the nanocomposite film. Transmission electron microscopy (TEM) analysis of BCNC-Fe3O4 nanoparticles showed irregular particle sizes ranging from 4.93 to 30.44 nm with an average size distribution of 22.94 nm. The presence of characteristic functional groups of PVA, BCNC and Fe3O4 were confirmed by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) analysis. Scanning electron microscope (SEM) attached energy dispersive spectroscopy (EDS) and vibrating sample magnetometer (VSM) analysis revealed that, the iron content and magnetic property increased with increasing BCNC-Fe3O4 content. The saturation magnetizations (MS) value increased from 5.14 to 11.56 emu/g. The PVA/ BCNC-Fe3O4 at 60% showed the highest Young’s modulus value of 2.35 ± 0.16 GPa. The prepared film could be a promising polymeric nanomaterial for various magnetic-based applications and for the design of smart electronic devices.

scholarly journals NATURE INSPIRED SYNTHESIS, PHYSICO-CHEMICAL CHARACTERIZATION OF Zn DOPED Fe3O4 NANOPARTICLES USING ANDROGRAPHIS PANICULATA (BURM. F.) NEES LEAF EXTRACT AND ASSESSMENT OF IN VITRO PANCREATIC ALPHA AMYLASE INHIBITORY ACTIVITY

2020 ◽  
pp. 229-235
Author(s):  
A. S. SAKTHI ATHITHAN ◽  
J. JEYASUNDARI ◽  
D. RENUGA ◽  
A. NAVEENA
Keyword(s):  
Magnetite Nanoparticles ◽  
Fe3o4 Nanoparticles ◽  
Chemical Characterization ◽  
Transition Element ◽  
Average Crystallite Size ◽  
Xrd Analysis ◽  
Andrographis Paniculata ◽  
X Ray ◽  
Fe3o4 Nps

Objective: Magnetite (Fe3O4) nanoparticles (NPs) have gained considerable attention in the Biomedical filed. Evolution of new magnetic material based on the transition metal-doped magnetite has become the subject of increasing research interest. The main aim of the current investigation was to improve the diabetic potential, optical, magnetic, structural properties of magnetite nanoparticles and hence Fe3O4 NPs were doped with a divalent transition element such as Zinc. Methods: Zinc doped magnetite nanoparticles (Zn-Fe3O4 NPs) were obtained through Co-precipitation methods using aqueous plant extract of Andrographis paniculata acted as an efficient stabilizer and a reducing agent. The structure, morphology, crystalline, optical and magnetic property of synthesized Zn-Fe3O4 NPs were evaluated by X-ray diffraction (XRD), Scanning electron microscopy with Energy dispersive x-ray spectroscopy(SEM-EDX), Fourier transform infrared spectroscopy (FTIR), Ultraviolet-Visible (UV-Vis) Spectrophotometer and Vibrating scanning magnetometer (VSM). Results: In XRD analysis, the average crystallite size of the synthesized Zn-Fe3O4 NPs was found to be 5 nm exhibiting super paramagnetic behavior, which composes it an appealing possibility for biomedicines. The Zn-Fe3O4 NPs had strongly inhibited the alpha (α)-amylase enzyme and had proved their therapeutic role. Conclusion: In conclusion, Zn-Fe3O4 NPs is an excellent anti-diabetic agent to control type 2 diabetes mellitus.

Water-induced modulus changes of bio-based uncured nanocomposite film based on natural rubber and bacterial cellulose nanocrystals

2018 ◽  
Vol 113 ◽  
pp. 240-248 ◽  
Author(s):  
Qing Yin ◽  
Dongni Wang ◽  
Hongbing Jia ◽  
Qingmin Ji ◽  
Liping Wang ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Bacterial Cellulose ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Film

scholarly journals Hydroponic Cultured Ginseng Leaves Zinc Oxides Nanocomposite Stabilized with CMC Polymer for Degradation of Hazardous Dyes in Wastewater Treatment

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6557
Author(s):  
Yinping Jin ◽  
Ling Li ◽  
Reshmi Akter ◽  
Esrat Jahan Rupa ◽  
Deok-Chun Yang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Wastewater Treatment ◽  
Large Scale ◽  
Xrd Analysis ◽  
Precipitation Method ◽  
Tem Analysis ◽  
Zinc Oxides ◽  
Ultraviolet Illumination ◽  
Natural Polyphenol ◽  
Co Precipitation

This study demonstrated the synthesis of o-carboxymethyl chitosan (CMC)-stabilized zinc oxide nanocomposites (ZnO NCs) combined with aqueous leaves extracts of hydroponically cultured ginseng and used as a photocatalyst for the degradation of hazardous dyes, including malachite green (MG), rhodamine B (RB), and congo red (CR) under ultraviolet illumination. Hydroponic ginseng leaves contain bioactive components, namely ginsenoside and natural polyphenol, which prompt ginseng’s biological effect. Besides, the CMC polymer is naturally biodegradable, stabilizes the nanoformation and enhances the solubility of ginsenoside. The hydroponic ginseng leaves zinc oxide CMC nanocomposites (GL–CMC–ZnO NCs) were synthesized using the co-precipitation method and characterized using different analytical methods. The FTIR analysis identified significant phytochemicals in the leaves extracts and cotton-shape morphology observed using FE-TEM analysis. The XRD analysis also determined that the crystallite size was 28 nm. The photocatalyst degraded CR, RB, and MG dyes by approximately 87%, 94%, and 96% within contact times of 10, 20, 25, and 30 min, respectively, when the dye concentration was 15 mg/L. As far as our knowledge, this is the first report on hydroponic ginseng NCs incorporated with the CMC polymer for the degradation of hazardous dyes on wastewater treatment. This study can add significant value to large-scale wastewater treatment.

scholarly journals Remove of Humic Acid From Water Using Magnetite Nanoparticles

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
M. Smiri ◽  
F. Guey ◽  
H. Chemingui ◽  
A. B. Dekhil ◽  
S. Elarbaoui ◽  
...  
Keyword(s):  
Humic Acid ◽  
Magnetite Nanoparticles ◽  
Fe3o4 Nanoparticles ◽  
Contact Time ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Sorption Data ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Co Precipitation

Synthesis, characterization and application of iron oxide nanoparticles have received much attention in recent years due to their interesting chemical and physics properties. Magnetite (Fe3O4) nanoparticles were synthesed by chemical co-precipitation and characterized using X ray diffraction (XDR), Fourier transmission spectroscopy (FT-IR), dynamic light scattering and (DLS). Fe3O4 nanoparticles were successfully removed humic acid (HA) from water. The influence of pH, contact time, adsorbent nanoparticle doses and HA concentrations were analyzed. Maximum HA removal occurred at pH 6 (89.63%), 40 mg.L-1 of Magnetite (88.8%), 0.03g of HA (96.64%) and contact time of 20 min (94.37%). Sorption data fit pseudo-second order kinetics, indicated a chemical adsorption process. The Langmuir, Freundlich and Temkin adsorption isotherm models were applied to describe equilibrium data. Adsorption of HA on magnetite nanoparticles was well described by Temkin model. The maximum adsorption capacity was 128.23 mg.g-1. Fe3O4 nanoparticles were promising potential adsorbents for HA removal from water.

Use of gamma irradiation technology for modification of bacterial cellulose nanocrystals/chitosan nanocomposite film

2021 ◽  
Vol 253 ◽  
pp. 117144
Author(s):  
Mahdieh Salari ◽  
Mahmoud Sowti Khiabani ◽  
Reza Rezaei Mokarram ◽  
Babak Ghanbarzadeh ◽  
Hossein Samadi Kafil
Keyword(s):  
Gamma Irradiation ◽  
Bacterial Cellulose ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Film ◽  
Irradiation Technology

Synthesis and Characterization of Bacterial Cellulose Nanocrystals and their PVA Nanocomposites

2010 ◽  
Vol 123-125 ◽  
pp. 383-386 ◽  
Author(s):  
Johnsy George ◽  
Amarinder S. Bawa ◽  
Siddaramaiah
Keyword(s):  
Bacterial Cellulose ◽  
Cellulose Nanocrystals ◽  
High Performance ◽  
Food Packaging ◽  
Polymer Nanocomposite ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Mechanical And Thermal Properties ◽  
Generic Class ◽  
Long Fibers

Cellulose, the most widespread biopolymer, is known to occur in a wide variety of living species from the worlds of plants and microbial sources like bacteria. Bacterial cellulose produced by Gluconacetobacter xylinus in the form of long fibers can be acid hydrolyzed under controlled conditions to obtain nanocrystals. Such nanocrystals constitute a generic class of ‘green’ nanomaterial and have attained great importance in the field of polymer nanocomposites attributed to their superior properties. However, conventional sulfuric acid hydrolysis route provides cellulose nanocrystals with inferior mechanical and thermal properties. In this study, a hydrochloric acid (HCl) assisted top down approach has been adopted to synthesize bacterial cellulose nanocrystals, which is found to retain some of the natural properties of native cellulose even in nano-dimensions. The morphological parameters were analyzed using atomic force microscopy which confirmed the formation of nanocrystals. Using these novel nanocrystals, poly vinyl alcohol (PVA) nanocomposite films were prepared and characterized for elucidating their properties. The addition of nanocrystals has significantly improved the thermal stability and mechanical properties of PVA nanocomposites. Results of this study demonstrated that nanocrystals obtained by HCl have several advantages in the fabrication of high performance polymer nanocomposite films for food packaging applications.

Assessment of Ploy Dopamine Coated Fe3O4 Nanoparticles for Melanoma (B16-F10 and A-375) Cells Detection

2020 ◽  
Vol 20 (16) ◽  
pp. 1918-1926
Author(s):  
Fahimeh H. Beigi ◽  
Soheil Fatahian ◽  
Sogand Shahbazi-Gahrouei ◽  
Daryoush Shahbazi-Gahrouei ◽  
Amin Farzadniya
Keyword(s):  
Mr Imaging ◽  
Mtt Assay ◽  
Fe3o4 Nanoparticles ◽  
Normal Skin ◽  
Iron Concentration ◽  
Positive Effects ◽  
Skin Cells ◽  
Melanoma B16 ◽  
Co Precipitation

Objective: Polydopamine coated iron oxide nanoparticles (Fe3O4@PDA NPs) were synthesized, characterized, and their MR imaging contrast agents and photothermal potency were evaluated on melanoma (B16-F10 and A-375) cells and normal skin cells. To this end, MTT assay, Fe concentration, and MR imaging of both coated and uncoated NPs were assessed in C57BL/6 mice. Methods: Fe3O4 nanoparticles were synthesized using co-precipitation, and coated with polydopamine. The cytotoxicity of Fe3O4 and Fe3O4@PDA NPs on melanoma cells, with different concentrations, were obtained using MTT assay. MR images and Fe concentrations of nanoprobe and nanoparticles were evaluated under in vivo conditions. Results: Findings indicated that uncoated Fe3O4 showed the highest toxicity in animal (B16-F10) cells at 450μg/ml after 72h, while the highest toxicity in human (A-375) cells were observed at 350μg/ml. These nanoparticles did not reveal any cytotoxicity to normal skin cells, despite having some toxicity features in A-375 cells. MR image signals in the tumor were low compared with other tissues. The iron concentration in the tumor was higher than that of other organs. Conclusion: It is concluded that the cytotoxicity of Fe3O4@PDA was found to be significantly lower than uncoated nanoparticles (p <0.001), which allows some positive effects on reducing toxicity. The prepared nanoprobe may be used as a contrast agent in MR imaging.

scholarly journals Functional Attributes of Myco-Synthesized Silver Nanoparticles from Endophytic Fungi: A New Implication in Biomedical Applications

Biology ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 473
Author(s):  
Prabu Kumar Seetharaman ◽  
Rajkuberan Chandrasekaran ◽  
Rajiv Periakaruppan ◽  
Sathishkumar Gnanasekar ◽  
Sivaramakrishnan Sivaperumal ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Culture Filtrate ◽  
Morphological Changes ◽  
Xrd Analysis ◽  
Penicillium Oxalicum ◽  
Breast Cancer Cell Lines ◽  
Face Centered Cubic ◽  
Tem Analysis ◽  
X Ray ◽  
Average Size

To develop a benign nanomaterial from biogenic sources, we have attempted to formulate and fabricate silver nanoparticles synthesized from the culture filtrate of an endophytic fungus Penicillium oxalicum strain LA-1 (PoAgNPs). The synthesized PoAgNPs were exclusively characterized through UV–vis absorption spectroscopy, Fourier Transform Infra-Red spectroscopy (FT-IR), X-ray powder diffraction (XRD), and Transmission Electron Microscopy (TEM) with energy dispersive X-ray spectroscopy (EDX). The synthesized nanoparticles showed strong absorbance around 430 nm with surface plasmon resonance (SPR) and exhibited a face-centered cubic crystalline nature in XRD analysis. Proteins presented in the culture filtrate acted as reducing, capping, and stabilization agents to form PoAgNPs. TEM analysis revealed the generation of polydispersed spherical PoAgNPs with an average size of 52.26 nm. The PoAgNPs showed excellent antibacterial activity against bacterial pathogens. The PoAgNPs induced a dose-dependent cytotoxic activity against human adenocarcinoma breast cancer cell lines (MDA-MB-231), and apoptotic morphological changes were observed by dual staining. Additionally, PoAgNPs demonstrated better larvicidal activity against the larvae of Culex quinquefasciatus. Moreover, the hemolytic test indicated that the as-synthesized PoAgNPs are a safe and biocompatible nanomaterial with versatile bio-applications.

scholarly journals Effect of cross-linkable bacterial cellulose nanocrystals on the physicochemical properties of silk sericin films

2021 ◽  
Vol 97 ◽  
pp. 107161
Author(s):  
Jeongmin Nam ◽  
Yujin Hyun ◽  
Subin Oh ◽  
Jinseok Park ◽  
Hyoung-Joon Jin ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Bacterial Cellulose ◽  
Cellulose Nanocrystals ◽  
Silk Sericin
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