The degradation of mechanical properties due to stress concentration caused by retained acetone in epoxy nanocomposites

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34188-34197 ◽  
Author(s):  
R. Atif ◽  
I. Shyha ◽  
F. Inam
Keyword(s):  
Mechanical Properties ◽  
Stress Concentration ◽  
Solution Casting ◽  
Epoxy Nanocomposites ◽  
Casting Technique ◽  
Different Types ◽  
Degradation Of Mechanical Properties ◽  
Solution Casting Technique

Multi-layered graphene (MLG)–epoxy nanocomposites of three different types were produced using the solution casting technique with MLG dispersed in three different mediums; acetone (MA), an epoxy (ME), and a hardener (MH).

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 Processing of Epoxy/1 wt%-graphene Nanocomposites: Effects of Ethanol on Flexural Properties

2019 ◽  
Vol 9 (1) ◽  
pp. 5440-5444 ◽  
Keyword(s):  
Impact Strength ◽  
Vickers Microhardness ◽  
Flexural Properties ◽  
Solution Casting ◽  
Sem Images ◽  
Maximum Increase ◽  
Graphene Nanocomposites ◽  
Casting Technique ◽  
Different Types ◽  
Solution Casting Technique

Four different types of nanocomposites were successfully produced using solution casting technique. Graphene was dispersed in four different ethanol concentrations; 0g, 1g, 2.5g, and 5g. In general, it can be observed that ethanol is an excellent agent for 1 wt% graphene dispersed in the epoxy matrix. The maximum increase in flexural properties, impact strength and microhardness were observed in 1 wt% graphene dispersed in 1g ethanol. The flexural strength and modulus increased by 62% and 61% respectively. The highest impact strength was recorded for 1 wt% graphene dispersed with 1g ethanol, where an improvement of 9.5% was observed. The maximum Vickers microhardness was recorded to improve 3% compared to monolithic epoxy. SEM images revealed that graphene can impede the advancing cracks and significantly change the fracture mode from a straight fracture path to radially emanated path. It is worth to point out that if ethanol is not completely evaporated during processing, it can cause porosity which is unfavourable to the mechanical properties of the nanocomposites.

Bonding and Mechanical Properties of PMMA/TiO2 Nanocomposites

2013 ◽  
Vol 832 ◽  
pp. 700-705 ◽  
Author(s):  
N.N. Hafizah ◽  
Mohamad Hafiz Mamat ◽  
Mohd Hanafiah Abidin ◽  
Che Mohd Som Said ◽  
Mohamad Rusop
Keyword(s):  
Mechanical Properties ◽  
Storage Modulus ◽  
Polymer Nanocomposites ◽  
Solution Casting ◽  
Casting Technique ◽  
Edx Analysis ◽  
Pmma Matrix ◽  
Solution Casting Technique

In this study, the polymer nanocomposites was prepared by mixing the TiO2 nanofiller into the polymer PMMA matrix using the sonication and solution casting technique. The PMMA/TiO2 nanocomposite was prepared at different amount of TiO2 in PMMA and was measured using FTIR, EDX and DMTA. The DMTA results show that the higher amount of TiO2 in PMMA will contribute to the increase of the storage modulus of the nanocomposites. But, the too high amount of the filler will limit the properties of the nanocomposites. The FTIR and EDX analysis also are discussed in this paper.

scholarly journals Tannic-Acid-Cross-Linked and TiO2-Nanoparticle-Reinforced Chitosan-Based Nanocomposite Film

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 228
Author(s):  
Swarup Roy ◽  
Lindong Zhai ◽  
Hyun Chan Kim ◽  
Duc Hoa Pham ◽  
Hussein Alrobei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tannic Acid ◽  
Nanocomposite Film ◽  
Food Packaging ◽  
Titanium Dioxide Nanoparticles ◽  
Casting Technique ◽  
Active Food Packaging ◽  
Reinforcing Agent ◽  
Solution Casting Technique ◽  
Cross Linker

A chitosan-based nanocomposite film with tannic acid (TA) as a cross-linker and titanium dioxide nanoparticles (TiO2) as a reinforcing agent was developed with a solution casting technique. TA and TiO2 are biocompatible with chitosan, and this paper studied the synergistic effect of the cross-linker and the reinforcing agent. The addition of TA enhanced the ultraviolet blocking and mechanical properties of the chitosan-based nanocomposite film. The reinforcement of TiO2 in chitosan/TA further improved the nanocomposite film’s mechanical properties compared to the neat chitosan or chitosan/TA film. The thermal stability of the chitosan-based nanocomposite film was slightly enhanced, whereas the swelling ratio decreased. Interestingly, its water vapor barrier property was also significantly increased. The developed chitosan-based nanocomposite film showed potent antioxidant activity, and it is promising for active food packaging.

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.

Bioactivity Assessment of Apatite Nuclei-PVDF Composite Thin Films

2018 ◽  
Vol 782 ◽  
pp. 78-83
Author(s):  
Hasnat Zamin ◽  
Takeshi Yabutsuka ◽  
Shigeomi Takai
Keyword(s):  
Thin Films ◽  
Calcium Phosphate ◽  
Simulated Body Fluid ◽  
Body Fluid ◽  
Polyvinylidene Fluoride ◽  
Solution Casting ◽  
Casting Technique ◽  
Doctor Blade ◽  
Solution Casting Technique ◽  
Hydroxyapatite Formation

Particles of calcium phosphate were precipitated by raising the temperature and the pH of simulated body fluid (SBF) named Apatite Nuclei (AN). AN and polyvinylidene fluoride (PVDF) composites thin films with different weight percentages of AN in PVDF were fabricated by solution casting technique, using doctor blade method. In order to assess the bioactivity, the thin films were soaked in simulated body fluid (SBF). It was found that the film containing 30 wt.% of AN in PVDF actively induced hydroxyapatite formation in 3 days soaking period in SBF.

A promising PMHS/PEO blend polymer electrolyte for all-solid-state lithium ion batteries

2018 ◽  
Vol 47 (42) ◽  
pp. 14932-14937 ◽  
Author(s):  
Yi-Jing Li ◽  
Chao-Ying Fan ◽  
Jing-Ping Zhang ◽  
Xing-Long Wu
Keyword(s):  
Solid State ◽  
Lithium Ion Batteries ◽  
Polymer Electrolyte ◽  
Lithium Ion ◽  
Solution Casting ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Blend Polymer Electrolyte ◽  
Blend Polymer

A novel PEO based polymer electrolyte prepared by the solution casting technique for use in all-solid-state lithium ion batteries.

Surface, Temperature and Optical Properties Pd-TiO2 Doped PVA Nanocomposite

2019 ◽  
Vol 962 ◽  
pp. 77-81
Author(s):  
B. Guruswamy ◽  
V. Ravindrachary ◽  
C. Shruthi ◽  
M. Mylarappa ◽  
G.O. Obaiah
Keyword(s):  
Optical Properties ◽  
Thermal Properties ◽  
Nanocomposite Films ◽  
Solution Casting ◽  
Absorption Method ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Modified Surface ◽  
Uv Visible ◽  
Effect Of Pd

The effect of Pd-TiO2 nanoparticle doping on structural, optical and thermal properties of the PVA polymer has been investigated using FTIR, UV-Visible, TGA and FESEM analysis. nanosized Pd-TiO2 particles were synthesized using standard method. Pure and Pd-TiO2/PVA nanocomposite films were prepared using solution casting technique. The FTIR study confirmed that the Pd-TiO2 nanoparticles interacts with the OH group of PVA polymer and forms the complex. The presence of these complexes affects the optical and thermal properties the composite. The change in the optical properties was studied using UV-Vis absorption method. The effect of doping on the thermal properties was studied using TGA method and the modified surface morphology using FESEM.

Characterization of Polyvinyl Acetate/Multi Walled Carbon Nanotube Nanocomposites

2016 ◽  
Vol 721 ◽  
pp. 13-17
Author(s):  
Juris Bitenieks ◽  
Remo Merijs Meri ◽  
Janis Zicans ◽  
Mārtiņš Kalniņš
Keyword(s):  
Polyvinyl Acetate ◽  
Nanocomposite Films ◽  
Solution Casting ◽  
Casting Technique ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Solution Casting Technique ◽  
Dielectrical Properties ◽  
Walled Carbon Nanotubes

Nanocomposite films from polyvinyl acetate (PVAc) dispersion and multi walled carbon nanotubes (MWCNTs) were prepared by solution casting technique. Stress-strain properties showed increase in elastic modulus and yield strength. Mechanical properties characterized by dynamic mechanical thermal analysis represented increase in storage modulus below glass transition temperature. Studied dielectrical properties of PVAc/MWCNT nanocomposites revealed formation of conductive MWCNT network in PVAc matrix.

Sign in / Sign up

Export Citation Format

Share Document