scholarly journals Fabrication and Characterization of Chitosan/Cellulose Nanocrystal/Glycerol Bio-Composite Films

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1096
Author(s):  
Kusmono Kusmono ◽  
Muhammad Waziz Wildan ◽  
Fadhlan Ihsan Lubis
Keyword(s):  
Thermal Stability ◽  
Water Absorption ◽  
Light Transmission ◽  
Composite Films ◽  
Tensile Modulus ◽  
Chitosan Film ◽  
Cellulose Nanocrystal ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Strength And Stiffness

Cellulose nanocrystal (CNC)-reinforced bio-composite films containing glycerol were produced using the solution casting technique. The influences of the addition of CNC (2, 4, and 8 wt%) and glycerol (10, 20, and 30 wt%) on the properties of the bio-composite films were studied in the present work. The resulting films were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and thermogravimetry analysis (TGA), and according to their tensile, water absorption, and light transmission behavior. The introduction of 4 wt% CNC into the chitosan film did not affect the thermal stability, but the presence of 20 wt% glycerol reduced the thermal stability. The addition of 4 wt% CNC to the chitosan film increased its tensile strength, tensile modulus, and elongation at break by 206%, 138%, and 277%, respectively. However, adding more than 8 wt% CNC resulted in a drastic reduction in the strength and ductility of the chitosan film. The highest strength and stiffness of the chitosan bio-composite film were attained with 4 wt% CNC and 20 wt% glycerol. The water absorption and light transmission of the chitosan film were reduced dramatically by the presence of both CNC and glycerol.

scholarly journals Corn Starch (Zea mays) Biopolymer Plastic Reaction in Combination with Sorbitol and Glycerol

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 242
Author(s):  
M.D. Hazrol ◽  
S.M. Sapuan ◽  
E.S. Zainudin ◽  
M.Y.M. Zuhri ◽  
N.I. Abdul Wahab
Keyword(s):  
Mechanical Properties ◽  
Zea Mays ◽  
Moisture Content ◽  
Water Absorption ◽  
Corn Starch ◽  
Tensile Modulus ◽  
Solution Casting ◽  
Casting Technique ◽  
Film Forming ◽  
Solution Casting Technique

The research included corn starch (CS) films using sorbitol (S), glycerol (G), and their combination (SG) as plasticizers at 30, 45, and 60 wt %, with a traditional solution casting technique. The introduction of plasticizer to CS film-forming solutions led to solving the fragility and brittleness of CS films. The increased concentration of plasticizers contributed to an improvement in film thickness, weight, and humidity. Conversely, plasticized films reduced their density and water absorption, with increasing plasticizer concentrations. The increase in the amount of the plasticizer from 30 to 60% showed a lower impact on the moisture content and water absorption of S-plasticized films. The S30-plasticized films also showed outstanding mechanical properties with 13.62 MPa and 495.97 MPa, for tensile stress and tensile modulus, respectively. Glycerol and-sorbitol/glycerol plasticizer (G and SG) films showed higher moisture content and water absorption relative to S-plasticized films. This study has shown that the amount and type of plasticizers significantly affect the appearances, physical, morphological, and mechanical properties of the corn starch biopolymer plastic.

scholarly journals The Surface Structure and Thermal Properties of Novel Polymer Composite Films Based on Partially Phosphorylated Poly(vinyl alcohol) with Aluminum Phosphate

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Asmalina Mohamed Saat ◽  
Mohd Rafie Johan
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
Thermal Properties ◽  
Surface Structure ◽  
Composite Films ◽  
Aluminum Phosphate ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Casting Technique ◽  
Solution Casting Technique

Partially phosphorylated polyvinyl alcohol (PPVA) with aluminum phosphate (ALPO4) composites was synthesized by solution casting technique to produce(PPVA)100-y-(ALPO4)y(y = 0, 1, and 2). The surface structure and thermal properties of the films were characterized using Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA). The results showed that the films have higher thermal stability with strong bonding between PPVA and ALPO4.

Fabrication and Morphological Characterization of Barium Titanate-Based Polymeric Nanocomposite Thin Films

2018 ◽  
pp. 50-59 ◽  
Author(s):  
Sudhanshu Singh ◽  
Umesh Kumar Dwivedi
Keyword(s):  
Barium Titanate ◽  
Room Temperature ◽  
Composite Films ◽  
Morphological Characterization ◽  
Solution Casting ◽  
Weight Percentage ◽  
Casting Technique ◽  
Nanocomposite Thin Films ◽  
Solution Casting Technique

In this critical review chapter, the authors explain the development of composite films of Barium Titanate (BaTiO3) and Poly (methyl methacrylate) prepared by solution casting technique. Different weight percentage composition of BaTiO3 has been selected to find out the best optimization condition for further investigation and correlate the results. The structural properties have been carried out at room temperature using XRD. Efforts have been made to correlate the results with investigated XRD results of pure BaTiO3 and its composites as observed by other workers at room temperature. The flow of experimental work and microscopic images are explained.

scholarly journals Effect of ultrahigh diluted homeopathic medicines on the electrical properties of PVDF-HFP

2021 ◽  
Vol 15 (1) ◽  
pp. 10-17
Author(s):  
Ahana Chatterjee ◽  
Biplab kumar Paul ◽  
Subrata Kar ◽  
Sukhen Das ◽  
Ruma Basu ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Simple Approach ◽  
Simple Solution ◽  
Solution Casting ◽  
Casting Technique ◽  
Ftir Studies ◽  
Poly Vinylidene Fluoride ◽  
Solution Casting Technique

In an effort to improve the electrical properties of the electroactive Poly(vinylidene fluoride-hexafluoropropylene) (PVdF-HFP), we introduced a novel and simple approach to synthesize PVDF-HFP composite films by incorporating ultrahigh dilutions of two homeopathic medicines Ferrum metallicum (FM) and Zincum oxidatum (ZO) in different potencies. The homeo-PVDF-composite films (HPCF) were synthesized by simple solution casting technique. XRD, FESEM, FTIR studies were performed to check the presence of nanoparticles in the film. The electrical properties of the HPCF samples get enhanced significantly due to the incorporation of the medicines and the effect increases with the increase in potency of the medicines.

scholarly journals Effect of cinnamon essential oil on morphological, flammability and thermal properties of nanocellulose fibre–reinforced starch biopolymer composites

2020 ◽  
Vol 9 (1) ◽  
pp. 1147-1159
Author(s):  
Razali M. O. Syafiq ◽  
Salit M. Sapuan ◽  
Mohd R. M. Zuhri
Keyword(s):  
Thermal Stability ◽  
Essential Oil ◽  
Cross Sections ◽  
Morphological Characteristics ◽  
Casting Technique ◽  
Electron Microscopy Analysis ◽  
Solution Casting Technique ◽  
Microscopy Analysis ◽  
Biopolymer Composites ◽  
Cinnamon Essential Oil

AbstractThe effect of different cinnamon essential oil (CEO) contents on flammability, thermal stability and morphological characteristics of nanocellulose fibre–reinforced starch biopolymer composites was studied. This sugar palm nanocellulose reinforced with sugar palm starch, containing 0–2% CEO, was prepared through solution casting technique. From scanning electron microscopy analysis, the cross-sections of the CEO-containing films showed appearance of micro-porous spots as micro-porous holes because of the occurrence of partial evaporation on the cryo-fractured surface as a result of the vacuum condition. Increment in CEO concentration resulted in increasing trend of the number and size of the micro-porous holes. Significant increase was observed in the thermal stability with the CEO loading when compared with neat composites. Besides that, increasing CEO loading also resulted in decrement of linear burning rate of the composites.

scholarly journals Ionic conductivity and dielectric studies of LiClO4 doped poly(vinylalcohol)(PVA)/chitosan(CS) composites

2014 ◽  
Vol 04 (04) ◽  
pp. 1450033 ◽  
Author(s):  
Sunil G. Rathod ◽  
R. F. Bhajantri ◽  
V. Ravindrachary ◽  
P. K. Pujari ◽  
T. Sheela
Keyword(s):  
Ionic Conductivity ◽  
Loss Factor ◽  
Room Temperature ◽  
Composite Films ◽  
Solution Casting ◽  
Dielectric Studies ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Polymer Host ◽  
Ft Raman

This paper focuses on the dielectric constant (ε′), dielectric loss factor (ε″) and frequency dependent conductivity (σac) properties of newly prepared poly(vinylalcohol) (PVA) chitosan (CS) composite films incorporated with different concentrations of LiClO 4. The composite films were prepared using solution casting technique. The complexation between salt and polymer host is confirmed by FT Raman and UV-Vis studies. The sample containing 20 wt.% LiClO 4 exhibits a highest ionic conductivity of 3 × 10-6 S/cm at room temperature. The dielectric properties of the composites follow non-Debye behavior.

scholarly journals SUSTAINABLE CELLULOSE NANOCRYSTAL REINFORCED CHITOSAN/HPMC BIO-NANOCOMPOSITE FILMS CONTAINING MENTHOL OIL AS PACKAGING MATERIALS

2021 ◽  
Vol 55 (5-6) ◽  
pp. 649-658
Author(s):  
SALAH A. A. MOHAMED ◽  
AHMED SALAMA ◽  
MOHAMED EL-SAKHAWY ◽  
ABDELMAGEED M. OTHMAN
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Food Packaging ◽  
Hydroxypropyl Methylcellulose ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Film Structure ◽  
Cellulose Nanocrystal ◽  
Nanocomposite Films ◽  
Low Oxygen

There is a growing demand to develop biodegradable composite films, with enhanced water resistance, antimicrobial activity, high mechanical properties and low oxygen permeability. In the present study, chitosan/hydroxypropyl methylcellulose (HPMC) films reinforced with cellulose nanocrystal (CNC) and containing menthol oil were prepared for food packaging applications. Menthol oil was selected due to its antibacterial properties, as well as relatively low cost and wide availability. CNC was prepared from bagasse via acid degradation. The bio-composites were prepared through a simple and versatile solution mixing and casting method. The morphology, chemical composition, water absorption, mechanical properties and antibacterial activity of the films were investigated. FTIR spectra were used to evaluate the film structure in terms of the interactions between components. Data showed that the addition of CNC improved the mechanical properties of the formed films and the menthol oil enhanced their antibacterial properties. HPMC and HPMC/CNC reduced the water absorption of the pure chitosan membrane from 70% to 22% and 9-11% by weight, respectively, which makes these constituents a good alternative for producing packaging.

Fabrication of Bioactive Polycaprolactone by Incorporation of Apatite Nuclei

2018 ◽  
Vol 782 ◽  
pp. 91-97
Author(s):  
Hasnat Zamin ◽  
Tomoko Hiruta ◽  
Takeshi Yabutsuka ◽  
Shigeomi Takai
Keyword(s):  
Calcium Phosphate ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Fine Particles ◽  
Composite Films ◽  
Solution Casting ◽  
Casting Technique ◽  
Doctor Blade ◽  
Solution Casting Technique

When the pH or the temperature of a simulated body fluid is raised, fine particles of calcium phosphate are precipitated, which are named apatite nuclei (AN). In this study, we aimed to impart bioactivity to polycaprolactone by incorporating AN. AN-PCL composite films having different weight percentages of AN in PCL were fabricated by solution casting technique, using doctor blade method. Results showed that more than 20 wt.% AN-PCL films were fully covered with hydroxyapatite layer in three days soaking period in SBF.

scholarly journals Structural, Vibrational, Morphological, Antibacterial and Electrical Conductivity Examination of Polystyrene Graphite Composite Films

2019 ◽  
Vol 8 (4S2) ◽  
pp. 219-224
Keyword(s):  
Electrical Conductivity ◽  
Composite Films ◽  
Conductive Polymer ◽  
Conductive Filler ◽  
Graphite Composite ◽  
Casting Technique ◽  
Polystyrene Matrix ◽  
Solution Casting Technique ◽  
Lcr Meter ◽  
Sem Analyses

High conductive filler graphite is added with polystyrene to prepare conductive polymer composites. Solution casting technique was implemented to prepare polystyrene films. Benzene is used as a solvent to dissolve polystyrene. Graphite is loaded in these polystyrene films with various concentrations from 0.5 % to 2.5 % as a filler. The reinforcement of graphite particles in polystyrene matrix is studied through various characterization techniques like XRD, FTIR and SEM analyses. Antibacterial studies are performed for two microorganisms. Electrical conductivity of the films are measured using LCR meter.

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