A Study of the Preparation of Silk Sericin/Chitosan Composite Film for Future Wound Dressing Applications

2015 ◽  
Vol 804 ◽  
pp. 179-182 ◽  
Author(s):  
Piyapong Pankaew ◽  
Pattarinee Klumdoung ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Composite Film ◽  
Wound Dressing ◽  
Composite Films ◽  
Fine Powder ◽  
Silk Sericin ◽  
Vis Spectroscopy ◽  
Silk Worm ◽  
Bombyx Mori Silk ◽  
Film Development ◽  
Chitosan Composite

Silk sericin/chitosan composite films were successfully prepared for possible future wound dressing applications. To prepare the chitosan, shrimp shells were first washed and finely ground to obtain a fine powder before extracting the chitosan using a chemical reaction method. The sericin was extracted from Thai raw cocoons of Bombyx mori silk worm via boiling and drying. To prepare the silk sericin/chitosan composite films, the silk sericin and chitosan solutions with varying volume ratios were mixed in a magnetic stirrer for 30 minutes. They were then dropped on to a plastic mold. The sample was dried at a temperature of 50 °C. The prepared composite films were characterized using UV-VIS spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The results from our studies could provide a method for future composite film development.

Processing of Elastic Silk Sericin/Gelatin Composite Film for Future Cosmetic Applications

2015 ◽  
Vol 804 ◽  
pp. 171-174
Author(s):  
Piyapong Pankaew ◽  
Pattarinee Klumdoung ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Composite Film ◽  
White Perch ◽  
Composite Films ◽  
Elastic Behaviour ◽  
Homogeneous Surface ◽  
Silk Sericin ◽  
Vis Spectroscopy ◽  
Silk Worm ◽  
Bombyx Mori Silk ◽  
Ft Ir

The silk sericin/gelatin composite films were successfully prepared for future cosmetic applications. The sericin was extracted from Thai raw cocoons of the Bombyx mori silk worm via boiling and drying. Gelatin was extracted from white perch scales through a chemical treatment. To prepare the silk sericin/gelatin composite film, the silk sericin and gelatin solutions with different volume ratios were blended in distilled water by stirring in a magnetic stirrer for 30 minutes. They were dropped on the plastic mold. The sample was kept at a temperature of 50 °C to let it dry. The prepared composite films were characterized using UV-VIS spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The silk sericin/gelatin composite films showed elastic behaviour, a homogeneous surface and no porosity which could indicate possible future use for cosmetic applications.

V and F Codoped TiO2-SiO2 Composite Films for Enhanced Photocatalytic Activity

2014 ◽  
Vol 955-959 ◽  
pp. 2384-2387
Author(s):  
Ling Xiao Guan ◽  
Yao Yao
Keyword(s):  
Photocatalytic Activity ◽  
Composite Film ◽  
Surface Area ◽  
Composite Films ◽  
Bet Surface Area ◽  
Methyl Green ◽  
Simple Process ◽  
Vis Spectroscopy ◽  
Excellent Photocatalytic Activity ◽  
Photocatalytic Activities

A simple process was developed for preparation of highly photoactive V and F codoped TiO2-SiO2 composite film. The as-prepared specimens were characterized using Brunauer–Emmett–Teller (BET) surface area, photoluminescence (PL) spectra, and UV–Vis spectroscopy. The BET results revealed that the surface area of the modified TiO2 sample was 413 m2 g-1, while pure TiO2 103 m2 g-1. The PL results showed that the recombination rate of the photo-generated electrons and holes was effectively prohibited via the multi-modification. The photocatalytic activities of the films were evaluated by degradation of methyl green (MG) dye. Compared with pure TiO2 film, the multi-modified TiO2 film exhibited excellent photocatalytic activity and clearly responsive to the visible light. Keywords: V and F codoping; TiO2-SiO2 composite film; Photocatalytic activity

scholarly journals Characterization of Chitosan Films Incorporated with Different Substances of Konjac Glucomannan, Cassava Starch, Maltodextrin and Gelatin, and Application in Mongolian Cheese Packaging

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 84
Author(s):  
Sijun Ma ◽  
Yuanrong Zheng ◽  
Ran Zhou ◽  
Ming Ma
Keyword(s):  
Composite Film ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Cassava Starch ◽  
Konjac Glucomannan ◽  
Vapor Permeability ◽  
Elongation At Break ◽  
Chitosan Composite ◽  
Storage Characteristics

Four kinds of edible composite films based on chitosan combined with additional substances (konjac glucomannan, cassava starch, maltodextrin and gelatin) and the addition of lysozyme were prepared and used as packaging materials for Mongolian cheese. The prepared composite films were evaluated using scanning electron microscopy and Fourier transform infrared spectroscopy. The physicochemical properties of all chitosan composite films, including thickness, viscosity, opacity, color, moisture content, water vapor permeability, tensile strength and elongation at break, were measured. The results show that Konjac glucomannan–chitosan composite film presented the strongest mechanical property and highest transparency. The cassava starch–chitosan composite film presented the highest water barrier property. The study on the storage characteristics of Mongolian cheese was evaluated at 4 °C. The results show that the cheese packaging by cassava starch–chitosan composite film presented better treatment performance in maintaining the quality, reducing weight loss and delayering microbial growth.

Improvement of Water Barrier Property of Rice Starch-chitosan Composite Film Incorporated with Lipids

2009 ◽  
Vol 15 (2) ◽  
pp. 149-158 ◽  
Author(s):  
T. Bourtoom ◽  
M.S. Chinnan
Keyword(s):  
Oleic Acid ◽  
Composite Film ◽  
Palm Oil ◽  
Moisture Transfer ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Rice Starch ◽  
Vapor Permeability ◽  
A Value ◽  
Chitosan Composite

This study investigated the effect of lipid types (oleic acid, palm oil, and margarine) and their concentrations (0, 10, 20, 30, 40, and 50wt%) on the water vapor permeability (WVP), tensile strength (TS), percentage of elongation at break (%E), and structure of emulsified rice starch-chitosan composite film. The influence of rice starch-chitosan composite film incorporated with lipids in controlling the moisture transfer in moisture-sensitive products was determined by wrapping a low aw-type cracker product in rice starch-chitosan composite film. TS and WVP of rice starch-chitosan composite film decreased with the addition of lipids, whereas %E increased in these films. Addition of lipids significantly raised film yellowness for composite films. The results showed that films added with oleic acid gave higher L*, b*, and chroma values but lower a* value than margarine and palm oil, respectively. The lower transparency of the films was noticed when a greater amount of lipid was incorporated (p < 0.05). Oleic acid-incorporated films provided the films with smoother surface and higher values of TS and %E but lower WVP than margarine and palm oil, respectively. Wrapping cracker samples in the rice starch-chitosan composite film incorporated with oleic acid could maintain the hardness and provide longer shelf life and lower moisture content than synthetic polyvinyl chloride film (PVC) and unwrapped (reference) crackers, respectively.

scholarly journals Synthesis and Characterization of Acetic Acid-Doped Polyaniline and Polyaniline–Chitosan Composite

Biomimetics ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 15 ◽  
Author(s):  
Bianca Pasela ◽  
Acelle Castillo ◽  
Rhenish Simon ◽  
Maria Pulido ◽  
Haidee Mana-ay ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Composite Films ◽  
Cell Viability Assay ◽  
Viability Assay ◽  
Vis Spectroscopy ◽  
Significant Difference ◽  
Solution Casting Method ◽  
Doped Polyaniline ◽  
Chitosan Composite

Polyaniline–chitosan (PAni–Cs) composite films were synthesized using a solution casting method with varying PAni concentrations. Polyaniline powders used in the composite synthesis were polymerized using acetic acid as the dopant media. Raman spectroscopy revealed that the PAni powders synthesized using hydrochloric acid and acetic acid did not exhibit significant difference to the chemical features of PAni, implying that PAni was formed in varying concentrations of the dopant media. The presence of agglomerated particles on the surface of the Cs composite, which may have been due to the presence of PAni powders, was observed with scanning electron microscope–energy dispersive X-ray spectroscopy (SEM–EDX). Ultraviolet–visible (UV–Vis) spectroscopy further showed the interaction of PAni with Cs where the Cs characteristic peak shifted to a higher wavelength. Cell viability assay also revealed that the synthesized PAni–Cs composites were nontoxic and may be utilized for future biomedical applications.

scholarly journals Thermoelectric Performance Enhancement of Naturally Occurring Bi and Chitosan Composite Films Using Energy Efficient Method

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 532
Author(s):  
Eunhwa Jang ◽  
Priyanshu Banerjee ◽  
Jiyuan Huang ◽  
Rudolph Holley ◽  
John T. Gaskins ◽  
...  
Keyword(s):  
Composite Film ◽  
Energy Efficient ◽  
High Pressures ◽  
Performance Enhancement ◽  
Microstructural Analysis ◽  
Composite Films ◽  
Weight Ratio ◽  
Uniaxial Pressure ◽  
Flexible Thermoelectric ◽  
Chitosan Composite

This work presents an energy efficient technique for fabricating flexible thermoelectric generators while using printable ink. We have fabricated thermoelectric composite thick films using two different mesh sizes of n-type bismuth particles, various binder to thermoelectric material weight ratios, and two different pressures, 200 MPa and 300 MPa, in order to optimize the thermoelectric properties of the composite films. The use of chitosan dissolved in dimethylsulfoxide with less than 0.2 wt. % of chitosan, the first time chitosan has been used in this process, was sufficient for fabricating TE inks and composite films. Low temperature curing processes, along with uniaxial pressure, were used to evaporate the solvent from the drop-casted inks. This combination reduced the temperature needed compared to traditional curing processes while simultaneously increasing the packing density of the film by removing the pores and voids in the chitosan-bismuth composite film. Microstructural analysis of the composite films reveals low amounts of voids and pores when pressed at sufficiently high pressures. The highest performing composite film was obtained with the weight ratio of 1:2000 binder to bismuth, 100-mesh particle size, and 300 MPa of pressure. The best performing bismuth chitosan composite film that was pressed at 300 MPa had a power factor of 4009 ± 391 μW/m K2 with high electrical conductivity of 7337 ± 522 S/cm. The measured thermal conductivity of this same sample was 4.4 ± 0.8 W/m K and the corresponding figure of merit was 0.27 at room temperature.

Preparation of Reduced Graphene Oxide/Chitosan Composite Films with Reinforced Mechanical Strength

2012 ◽  
Vol 430-432 ◽  
pp. 247-250 ◽  
Author(s):  
Yong Qiang He ◽  
Na Na Zhang ◽  
Wen Chao Wang ◽  
Si Yao He ◽  
Qiao Juan Gong ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Composite Films ◽  
Solvent Casting ◽  
Casting Method ◽  
X Ray ◽  
Reduced Graphene ◽  
Vis Spectroscopy ◽  
Membrane Rigidity ◽  
Chitosan Composite

Reduced graphene oxide (rGO)/chitosan composite films were fabricated by a solvent casting method and cross-linked using genipin. Their properties were characterized by scanning electron microscopy, X-ray powder diffraction, Raman spectroscopy, and UV-Vis spectroscopy. When rGO was added the tensile strength and membrane rigidity of the films increased, but their swelling ability in water decreased.

scholarly journals Biodegradable and Transparent PVA/Starch-Based Composite Films for Wound Dressing Applications

2021 ◽  
Vol 4 (1) ◽  
pp. 31
Author(s):  
Mohammad Mohsen Delavari ◽  
Ion Stiharu
Keyword(s):  
Citric Acid ◽  
Composite Film ◽  
Wound Dressing ◽  
Transmission Rate ◽  
Low Cost ◽  
Bacterial Flora ◽  
Composite Films ◽  
Rapid Expansion ◽  
Wound Dressings ◽  
Potential Candidate

Industrial plastic production has the significant benefits of convenience, safety, and low cost. Further to the benefits are added the aesthetic qualities, the mechanical strength and the capability to mix with other materials such as fibers. All these contributed to the rapid expansion of plastics (polystyrene and nylon) in multiple applications and various purposes, such as biomedical materials, packaging, transport, industry, and agriculture. On the other hand, global warming is now one of the most concerning issues for all people. It is considered that replacing some of the conventional materials in various applications such as wound dressings with biodegradable starch-based films is a step forward in addressing environmental issues. Due to mechanical debriding of tissues, traditional dressings like regular cotton gauzes are counterproductive and end up causing painful wound trauma during dressing procedures. The development of transparent wound dressing films enables a moist healing environment with enhanced bacterial impermeability. The performance of polyvinyl alcohol/starch/citric acid (PVA/St/CA) based composite film for wound dressing applications is addressed in this work. Literature recorded fixed composition of PVA (2.5 w/w%), starch (2.5 w/w%), and glycerol (2 w/w%) during 70–80 °C casting temperature. Different citric acid concentrations (0.5 to 2 g) were investigated during the development of composite film solution casting. Prepared samples have been characterized by swelling index, solubility-dependent biodegradability, and tensile strength (TS). The film also exhibits enhanced combinations of the water vapor transmission rate and antibacterial efficiency against the bacterial flora (various bacteria existent in the air). As an extra benefit, such materials are easily degraded in water for up to seven days with a minute footprint. A potential candidate for wound dressing applications has been inferred from the biodegradable PVA/St/CA films with all these useful features.

scholarly journals Preparation and Characterization of Chitosan–Nano-ZnO Composite Films for Preservation of Cherry Tomatoes

Foods ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 3135
Author(s):  
Yu Li ◽  
Yu Zhou ◽  
Zhouli Wang ◽  
Rui Cai ◽  
Tianli Yue ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Composite Film ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Chitosan Film ◽  
Light Transmittance ◽  
Soluble Solid Content ◽  
Nano Zno ◽  
Chitosan Composite ◽  
Cherry Tomatoes

Chitosan is widely used as a natural preservative of fruits and vegetables, but its poor mechanical and water resistances have limited its application. Therefore, in this study, we prepared chitosan composite films by incorporating different amounts of nano-zinc oxide (nano-ZnO) to improve the mechanical properties of chitosan. We also assessed the antibacterial activity of these films against selected microorganisms. The addition of nano-ZnO improved the tensile strength (TS) and elongation at break (EAB) of the chitosan films and reduced their light transmittance. TS and EAB increased from 44.64 ± 1.49 MPa and 5.09 ± 0.38% for pure chitosan film to 46.79 ± 1.65 MPa and 12.26 ± 0.41% for a 0.6% nano-ZnO composite film, respectively. The ultraviolet light transmittance of composite films containing 0.2%, 0.4%, and 0.6% nano-ZnO at 600 nm decreased from 88.2% to 86.0%, 82.7%, and 81.8%, respectively. A disc diffusion test showed that the composite film containing 0.6% nano-ZnO had the strongest antibacterial activity against Alicyclobacillus acidoterrestris, Staphylococcus aureus, Escherichia coli, and Salmonella. In a 15-day preservation study, chitosan composite films containing 0.6% nano-ZnO maintained the soluble solid content of cherry tomatoes, effectively inhibited their respiration, and exhibited good antibacterial properties against the selected microorganisms. Overall, the prepared chitosan nano-ZnO composite film showed a good preservation effect on cherry tomatoes.

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