Effect of Type of Plasticizers on Mechanical and Water Barrier Properties of Transglutaminase Cross-Linked Zein–Oleic Acid Composite Films

2016 ◽  
Vol 12 (4) ◽  
pp. 365-376 ◽  
Author(s):  
Kingsley Masamba ◽  
Yue Li ◽  
Joseph Hategekimana ◽  
Fei Liu ◽  
Jianguo Ma ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oleic Acid ◽  
Ethylene Glycol ◽  
Composite Films ◽  
Barrier Properties ◽  
Irregular Surface ◽  
Vapour Permeability ◽  
Water Barrier ◽  
Scanning Electron

Abstract The effect of using four plasticizers namely ethylene glycol, propylene glycol, glycerol and sorbitol on mechanical and water barrier properties of transglutaminase cross-linked zein–oleic acid composite films was investigated. Results revealed that both mechanical and water barrier properties of the films were significantly affected (p<0.05) by plasticizer type. Tensile strength (TS), water vapour permeability (WVP) and solubility (SB) values were all better in ethylene glycol control plasticized films compared to other plasticizers. Furthermore, irrespective of plasticizer type, transglutaminase treatment improved TS while when oleic acid was incorporated into the films in the range of 1–4% based on zein weight, the mechanical and water barrier properties of the composite film were diversely affected. Results from scanning electron microscopy for the 2% oleic acid-incorporated composite films revealed a rough and irregular surface morphology for the sorbitol plasticized films. Overall, ethylene glycol provided better mechanical and water barrier properties.

Kaolinite dispersion in cassava starch-based composite films: a photonic microscopy and X-ray tomography study

2018 ◽  
Vol 38 (7) ◽  
pp. 641-647
Author(s):  
Jean Aimé Mbey ◽  
Fabien Thomas ◽  
Sandrine Hoppe
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dimethyl Sulfoxide ◽  
Polymer Matrix ◽  
Composite Films ◽  
Cassava Starch ◽  
X Ray ◽  
Clay Dispersion ◽  
Combined Use ◽  
Scanning Electron

Abstract In the present study, a combined use of photonic microscopy, scanning electron microscopy and 3D X-ray tomography is carried out in order to analyze the dispersion and the distribution of raw and dimethyl sulfoxide (DMSO)-intercalated kaolinite used as filler in cassava starch-based films. It is shown that the association of these techniques allows a valuable analysis of clay dispersion in polymer-clay composite films. In the case of kaolinite-starch composite films on which this study is focused, it is obvious that previous intercalation of kaolinite with DMSO is an efficient way to improve dispersion and distribution of kaolinite in a starch polymer matrix.

scholarly journals Preparation and Characterization of K-Carrageenan/Nanosilica Biocomposite Film

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Lokesh R. Rane ◽  
Niranjan R. Savadekar ◽  
Pravin G. Kadam ◽  
Shashank T. Mhaske
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Contact Angle ◽  
Tensile Strength ◽  
Water Vapour ◽  
Transmission Rate ◽  
Composite Films ◽  
Tensile Modulus ◽  
Water Vapour Transmission Rate ◽  
Scanning Electron

The purpose of this study is to improve the performance properties of K-carrageenan (K-CRG) by utilizing nanosilica (NSI) as the reinforcing agent. The composite films were prepared by solution casting method. NSI was added up to 1.5% in the K-CRG matrix. The prepared films were characterized for mechanical (tensile strength, tensile modulus, and elongation at break), thermal (differential scanning calorimetry, thermogravimetric analysis), barrier (water vapour transmission rate), morphological (scanning electron microscopy), contact angle, and crystallinity properties. Tensile strength, tensile modulus, and crystallinity were found to have increased by 13.8, 15, and 48% whereas water vapour transmission rate was found to have decreased by 48% for 0.5% NSI loaded K-CRG composite films. NSI was found to have formed aggregates for concentrations above 0.5% as confirmed by scanning electron microscopy. Melting temperature, enthalpy of melting, and degradation temperature of K-CRG increased with increase in concentration of NSI in K-CRG. Contact angle also increased with increase in concentration of NSI in K-CRG, indicating the decrease in hydrophilicity of the films improving its water resistance properties. This knowledge of the composite film could make beneficial contributions to the food and pharmaceutical packaging applications.

scholarly journals EFFECT OF POLYCAPROLACTONE ON CHARACTERISTICS AND MORPHOLOGY OF ALGINATE/CHITOSAN/LOVASTATINE COMPOSITE FILMS

2018 ◽  
Vol 56 (4A) ◽  
pp. 13 ◽  
Author(s):  
Nguyễn Thúy Chinh ◽  
Hoang Thai ◽  
Loc Thi Thach ◽  
Giang Duc Le ◽  
Thuy Phuong Ngo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Solution Method ◽  
Composite Films ◽  
Total Weight ◽  
Differential Scanning Calorimetric ◽  
Ft Ir ◽  
Scanning Electron

In this work, alginate (AG)/chitosan (CS)/lovastatine (LS) AG/CS/PCL/LS composite films using polycaprolactone (PCL)  are prepared by solution method with the ratio of AG/CS and LS content fixed at 4/1 and 10 wt.% (in comparison with the total weight of CS and AG), respectively.  The PCL content is used at 3, 5 and 10 wt.% (in compared with total weight of AG, CS and LS). The role of PCL as a compatibilizer in AG)/CS)/LS composites is considered by Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Differential Scanning Calorimetric (DSC) methods. Based on the change in FTIR spectra, morphology and thermal parameters of AG/CS/PCL/LS composites, it can be seen that PCL has effectiveness of compatibility for AG, CS, and LS as well as plasticity for the composites. Besides, the influence of PCL content on the swelling degree of the composites is also investigated. 

Selected lobar injury after infusion of oleic acid

1979 ◽  
Vol 47 (4) ◽  
pp. 706-711 ◽  
Author(s):  
B. P. Griffith ◽  
R. G. Carroll ◽  
R. L. Hardesty ◽  
R. L. Peel ◽  
H. S. Borovetz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oleic Acid ◽  
Fibrous Tissue ◽  
Chronic Phase ◽  
Architectural Distortion ◽  
Phase Study ◽  
Injury Model ◽  
Ventilation And Perfusion ◽  
Scanning Electron

A model of respiratory distress has been developed using sheep in which an isolated lobar injury is induced by infusion of oleic acid into a selected lobar artery. The directed insult permits acute and chronic phase study without the requirement of intensive pulmonary support. One hour after selective lobar injury the affected pulmonary venous oxygenation (Ppvo2) was reduced from greater than 310 to 66–90 Torr. Ppvo2 was most impaired at 48 h (40–55 Torr), but showed improvement by 96 h postinjury. Radionuclide estimates of lobar ventilation and perfusion demonstrated an initial fall in ventilation by 51% and corresponding 41% reduction in perfusion. By 24 h the depression of perfusion matched that of ventilation. Sequential light and scanning electron microscopy demonstrated the presence of a nonhomogeneous injury with areas of both complete parenchymal replacement by fibrous tissue and those with minimal architectural distortion. The selective injury model offers a useful methodology for the evaluation of the effects of various agents on the acute and chronic response of the lung to injury.

Growth of Molybdenum Trioxide Nanoribbons on Oriented Ag and Au Nanostructures: A Scanning Electron Microscopy (SEM) Study

2019 ◽  
Vol 25 (6) ◽  
pp. 1449-1456 ◽  
Author(s):  
Paramita Maiti ◽  
Arijit Mitra ◽  
R. R. Juluri ◽  
Ashutosh Rath ◽  
Parlapalli V Satyam
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Molybdenum Trioxide ◽  
High Vacuum ◽  
Composite Films ◽  
Ultra High Vacuum ◽  
Native Oxide ◽  
Native Oxide Layer ◽  
Sem Study ◽  
Scanning Electron

AbstractWe report the growth of molybdenum trioxide (MoO3) nanoribbons (NRs) on epitaxial Ag and oriented Au nanostructures (NSs) using an ultra-high vacuum (UHV)-molecular beam epitaxy (MBE) technique at different substrate temperatures. An approximately 2 nm silver (Ag) film has been deposited at different growth temperatures (using UHV-MBE) on cleaned Si(100), Si(110), and Si(111) substrates. For faceted Au NSs, an approximately 50 nm Au film has been deposited (using high-vacuum thermal evaporation) on a Si(100) substrate with a native oxide layer at the interface and the sample was annealed in low vacuum (≈10−2) and at high temperature (≈975°C). Scanning electron microscopy measurements were performed to determine the morphology of MoO3/Ag and MoO3/Au composite films. From energy dispersive X-ray spectroscopy elemental mapping and line scans it is found that faceted Au NSs are more favorable for the growth of MoO3 NRs than epitaxial Ag microstructures.

scholarly journals SCANNING ELECTRON MICROSCOPY AND ATOMIC FORCE MICROSCOPY OF CHITOSAN COMPOSITE FILMS

2010 ◽  
Vol 55 (3) ◽  
pp. 352-354 ◽  
Author(s):  
GALO CÁRDENAS ◽  
PAOLA ANAYA ◽  
RODRIGO DEL RIO ◽  
RICARDO SCHREBLER ◽  
CARLOS von PLESSING ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Composite Films ◽  
Force Microscopy ◽  
Atomic Force ◽  
Chitosan Composite ◽  
Scanning Electron

scholarly journals Влияние углеродных нанотрубок на электрические и механические свойства хитозановых пленок

2022 ◽  
Vol 92 (3) ◽  
pp. 435
Author(s):  
А.М. Камалов ◽  
В.В Kодолова-Чухонцева ◽  
E.Н Дресвянина ◽  
T.П Масленникова ◽  
И.П Добровольская ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Composite Films ◽  
X Ray Diffraction ◽  
Electronic Components ◽  
Electrical Field ◽  
Field Frequency ◽  
X Ray ◽  
Scanning Electron

Using the methods of X-ray diffraction and scanning electron microscopy, the structure of composite films based on chitosan and single-wall carbon tubes has been studied. It is shown that the introduction of carbon nanotubes leads to the ordering of the chitosan structure. Increase in concentration of nanotubes (from 0 to 3%) causes rise in the value of storage modulus from 3 to 4 GPa (DMA data), increase in electrical conductivity of samples (from 10-11 to 102 S/m), and some changes in their dielectric permittivity (from 5.5. to 26 at an electrical field frequency of 1kHz). Data on the ionic and electronic components of the conductivity of the composite film are presented.

scholarly journals Assessing Biodegradability of PVA/Starch Based Composite Films Reinforced With Long Chain Fatty Acid Grafted Barley Husk

2021 ◽  
Author(s):  
Aanchal Mittal ◽  
Sangeeta Garg ◽  
Shailendra Bajpai
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Arachidic Acid ◽  
Composite Films ◽  
Poly Vinyl Alcohol ◽  
Physico Chemical ◽  
Barley Husk ◽  
Ft Ir ◽  
Degradation In Soil ◽  
Scanning Electron

Abstract The main objective of this study is the preparation of poly (vinyl alcohol) PVA/starch based composite films reinforced with barley husk and grafted barley husk (prepared using lauric acid, palmitic acid and arachidic acid) for packaging applications and assessment of their biodegradability. The biodegradability test of the films was performed by measuring weight loss of the films after degradation in soil under natural environmental conditions and by measuring evolved carbon dioxide (CO2) during degradation under aqueous aerobic environment containing activated sludge. Physico-chemical variation in the films after degradation were observed using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR). The composite films containing barley husk showed highest degradation in soil (70 % after 180 days) as well as in aqueous aerobic medium (58.83 % after 30 days). The results of scanning electron microscopy showed the formation of cracks and holes over the surface of the composite films after degradation. The degradation of the films occurred inside the composite films, not only on their surface. The incorporation of starch and barley husk in PVA matrix enhanced the degradation rate of films.

Effect of drying temperature and pH alteration on mechanical and water barrier properties of transglutaminase cross linked zein–oleic acid composite films

LWT ◽  
2016 ◽  
Vol 65 ◽  
pp. 518-531 ◽  
Author(s):  
Kingsley Masamba ◽  
Yue Li ◽  
Joseph Hategekimana ◽  
Jianguo Ma ◽  
Fang Zhong
Keyword(s):  
Oleic Acid ◽  
Composite Films ◽  
Barrier Properties ◽  
Drying Temperature ◽  
Water Barrier

The Electrodeposition of Nanostructured Ni-TiN Composite Films

2009 ◽  
Vol 620-622 ◽  
pp. 727-730 ◽  
Author(s):  
Chao Cai ◽  
Jun Ying Yin ◽  
Zhao Zhang ◽  
Jian Feng Yang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ph Value ◽  
Composite Films ◽  
Bath Temperature ◽  
Nanocomposite Films ◽  
Solution Ph ◽  
Corrosion Properties ◽  
Tin Nanoparticles ◽  
Scanning Electron

The Ni-TiN nanocomposite films have been successfully fabricated onto commercial brass copper substrates using dc electroplating technique, and the microstructure and anti-corrosion properties of the optimized Ni-TiN nanocomposite have been respectively characterized using scanning electron microscopy (SEM). The results show that the morphology of Ni-TiN composite film is sensitively dependent on the electroplating current density, the concentration of TiN nanoparticles, the solution stirring speed, the bath temperature and the solution pH value.

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