scholarly journals Eco-Friendly, Green Packaging Materials from Akaganeite and Hematite Nanoparticle-Reinforced Chitosan Nanocomposite Films

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
G. T. D. Chandrakumara ◽  
D. M. S. N. Dissanayake ◽  
M. M. M. G. P. G. Mantilaka ◽  
R. T. De Silva ◽  
H. M. T. G. A. Pitawala ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Barrier Properties ◽  
Tensile Tests ◽  
Maximum Tensile Stress ◽  
Nanocomposite Films ◽  
Iron Oxide Nanoparticle ◽  
Electron Microscopic ◽  
Sem Images ◽  
Chitosan Matrix ◽  
Green Packaging

In this study, chitosan nanocomposite thin films were successfully fabricated by incorporating hematite nanoparticles (HNPs) and akaganeite nanoparticles (ANPs) as reinforcing fillers using the solution casting method. HNPs and ANPs were synthesized via a urea-assisted synthesis route using naturally occurring ferruginous laterites. Scanning electron microscopic (SEM) images indicated the spherical to subhexagonal morphology of the HNPs and rice-like morphology of the ANPs. X-ray diffractograms indicate the crystalline structure of iron oxides as hematite and akaganeite. Tensile tests were carried out to evaluate the mechanical properties of the nanocomposite films where maximum tensile stress of the chitosan/HNP composites was improved as high as 35.7% while chitosan/ANP composites indicated 43.5%. Thermal decomposition curves obtained by thermogravimetric analysis (TGA) indicate that the thermal stability of the nanocomposites has improved remarkably compared to neat chitosan films. Furthermore, these nanocomposites exhibited excellent UV barrier properties as identified by UV-visible spectrometry. Fourier-transform infrared (FTIR) spectroscopic results are evident in the presence of Fe-O bond in the wavenumber around 480-500 cm-1, and the result also indicated that the nanofillers interact with the chitosan matrix via hydrogen bonding, which enhanced the physical properties of the nanocomposites. Incorporation of iron oxide nanoparticle varieties into chitosan has led to improvements of certain physical and chemical properties, which make chitosan a promising material for packaging applications.

scholarly journals Effect of Molecular Weight and Degree of Substitution on the Physical-Chemical Properties of Methylcellulose-Starch Nanocrystal Nanocomposite Films

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3291
Author(s):  
Qian Xiao ◽  
Min Huang ◽  
Xiaolan Zhou ◽  
Miaoqi Dai ◽  
Zhengtao Zhao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Tensile Strength ◽  
Chemical Properties ◽  
Barrier Properties ◽  
Physicochemical Characteristics ◽  
Degree Of Substitution ◽  
Nanocomposite Films ◽  
Green Method ◽  
Water Vapor Barrier ◽  
Trade Name

This research studied the effect of molecular weight (Mw) and degree of substitution (DS) on the microstructure and physicochemical characteristics of methylcellulose (MC) films with or without SNC. The Mw and DS of three types of commercial MC (trade name of M20, A4C, and A4M, respectively) were in the range of 0.826 to 3.404 × 105 Da and 1.70 to 1.83, respectively. Mw significantly affected the viscosity of methylcellulose solutions as well as the microstructure and tensile strength of methylcellulose films, while DS had a pronounced effect on their oxygen permeability properties. The incorporation of 15% (w/w) SNC resulted in the efficient improvement of tensile strength, water, and oxygen barrier properties of films, particularly for the A4C nanocomposite films. The results from SEM and FTIR illustrated that relatively homogenous dispersion of SNC was distinguished in A4C-15% (w/w) SNC films. Furthermore, microstructures of MC-SNC nanocomposite films were strongly dependent on both Mw and DS of MC. This work offers a convenient and green method to fabricate MC-based nanocomposite films with desirable mechanical, light, oxygen, and water vapor barrier properties.

Preparation of LLDPE/Modified Silica Nanoparticle with Triethoxyvinylsilane Film for Microwaveable Packaging

2012 ◽  
Vol 488-489 ◽  
pp. 1525-1529
Author(s):  
Arjaree Pradittham ◽  
Supapen Trejitwattanaku ◽  
Titima Sramanee ◽  
Sarinthip Thanakkasaranee ◽  
Duangduen Atong ◽  
...  
Keyword(s):  
Silica Nanoparticle ◽  
Barrier Properties ◽  
Tensile Tests ◽  
Nanocomposite Films ◽  
Modified Silica ◽  
Vapor Permeation ◽  
Complex Process ◽  
Multiple Variables ◽  
Nanoparticle Film ◽  
Better Than

Nanocomposite films based on liner low density polyethylene (LLDPE), containing of 1 phr silica nanoparticle and 1, 3 and 5 %wt triethoxyvinylsilane as a new coupling were prepared and characterized using FTIR tests, scanning electron microscopy, tensile tests, oxygen and water vapor permeation measurements. Optimization of the technology involved in production of an exfoliated nanocompound is a complex process in which multiple variables and parameters are involved. The results of the study showed that the feed position of the nanoparticle in the double screw extruder is of vital importance in obtaining an exfoliated film. The maximum triethoxyvinylsilane used in the extruder was 3 %wt, for LLDPE/modified silica nanoparticle. There was no exfoliation or intercalation of the silica particle in the absence of triethoxyvinylsilane. The oxygen barrier properties of the LLDPE/modified silica nanoparticle film were significantly better than those of the LDPE/silica nanoparticle film. In addition to barrier properties, the LLDPE/silica/3%TEVS film also had better Young’s modulus and tensile strength than their counterparts without triethoxyvinylsilane.

Biodegradable Poly(Lactic Acid)/Perkalite Clay Nanocomposites: Gas Barrier Properties

2016 ◽  
Vol 718 ◽  
pp. 10-14 ◽  
Author(s):  
Chuenkhwan Tipachan ◽  
Somjai Kajorncheappunngam
Keyword(s):  
Lactic Acid ◽  
Nanocomposite Film ◽  
Transmission Rate ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Poly Lactic Acid ◽  
Sem Images ◽  
Gas Barrier ◽  
Oxygen Transmission Rate ◽  
Gas Barrier Properties

Nanocomposite films based on poly (lactic) acid (PLA) and organically nanoclay Perkalite were prepared by solvent casting method. The incorporation of Perkalite clay in PLA film was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. Morphology of PLA/Perkalite film was investigated using scanning electron microscope (SEM). The gas barrier properties of PLA nanocomposite films were determined through oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) measurement. Results from FTIR analysis indicates that Perkalite clay was incorporated in PLA film. SEM images show that dispersion of Perkalite particle on the PLA matrix was good with the additional of clay up to 3 pph (parts of clay per hundred part of PLA). The maximum reduction in OTR and WVTR of that nanocomposite film with Perkalite loading of 3 pph are 76% and 37%, respectively compared with neat PLA film. This proves that gas barrier property of PLA film is improved significantly with incorporation of Perkalite clay. The PLA/Perkalite nanocomposite film is a promising as green based packaging materials.

scholarly journals Assessment of Graphene Oxide and Nanoclay Based Hybrid Filler in Chlorobutyl-Natural Rubber Blend for Advanced Gas Barrier Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1098
Author(s):  
Jibin Keloth Paduvilan ◽  
Prajitha Velayudhan ◽  
Ashin Amanulla ◽  
Hanna Joseph Maria ◽  
Allisson Saiter-Fourcin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Black ◽  
Natural Rubber ◽  
Gas Permeability ◽  
Chemical Properties ◽  
Barrier Properties ◽  
Hybrid Filler ◽  
Physical And Chemical ◽  
Chlorobutyl Rubber ◽  
And Chemical Properties

Nanomaterials have engaged response from the scientific world in recent decades due to their exceptional physical and chemical properties counter to their bulk. They have been widely used in a polymer matrix to improve mechanical, thermal, barrier, electronic and chemical properties. In rubber nanocomposites, nanofillers dispersion and the interfacial adhesion between polymer and fillers influences the composites factual properties. In the present work, a comparison of the hybrid effects of carbon black with two different nanofillers (graphene oxide and nanoclay) was studied. The 70/30 composition of chlorobutyl rubber/natural rubber elastomer blend was taken as per the blend composition optimized from our previous studies. The hybrid effects of graphene oxide and nanoclay in dispersing the nanofillers were studied mainly by analyzing nanocomposite barrier properties. The results confirm that the combined effect of carbon black with graphene oxide and nanoclay could create hybrid effects in decreasing the gas permeability. The prepared nanocomposites which partially replace the expensive chlorobutyl rubber can be used for tyre inner liner application. Additionally, the reduction in the amount of carbon black in the nanocomposite can be an added advantage of considering the environmental and economic factors.

Improved mechanical and barrier properties of low-density polyethylene nanocomposite films by incorporating hydrophobic graphene oxide nanosheets

RSC Advances ◽  
2015 ◽  
Vol 5 (98) ◽  
pp. 80739-80748 ◽  
Author(s):  
Hua-Dong Huang ◽  
Sheng-Yang Zhou ◽  
Peng-Gang Ren ◽  
Xu Ji ◽  
Zhong-Ming Li
Keyword(s):  
Graphene Oxide ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Low Density Polyethylene ◽  
Packaging Materials ◽  
Low Density ◽  
Graphene Oxide Nanosheets

The successful conversion from hydrophilic GONSs to hydrophobic ODA–GONSs imparts LDPE nanocomposite films with enhanced mechanical and barrier performances for potential packaging materials.

Comparative study of thermoplastic liner materials with regard to mechanical and permeation barrier properties before and after cyclic thermal aging

2021 ◽  
Vol 63 (4) ◽  
pp. 311-316
Author(s):  
Simon Backens ◽  
Jan Siering ◽  
Stefan Schmidt ◽  
Nikolai Glück ◽  
Wilko Flügge
Keyword(s):  
Thermal Aging ◽  
Barrier Properties ◽  
Tensile Tests ◽  
Polyamide 6 ◽  
Pressure Vessels ◽  
Cross Linking ◽  
Polyamide 12 ◽  
Type Iv ◽  
Before And After ◽  
Permeation Properties

Abstract Lightweight pressure vessels of type IV for hydrogen storage consist of a thermoplastic inner liner, commonly from polyethylene or polyamide. The liner is the permeation barrier against the compressed gas and must prevent the formation of cracks, also after temperature changes, for example after refueling processes. In the present work high-density polyethylene, cross-linked polyethylene, polyamide 6 and polyamide 12 were characterized by tensile tests, single notch impact tests and permeations measurements before and after a cyclic thermal aging process. The aging only lead to slight changes of mechanical properties due to post-crystallization, but to a significant decrease of permeation properties. This decrease was contributed to weakened, amorphous regions where chain splitting occurred. Considerable differences in properties resulted from different peroxide cross-linking times of polyethylene at the same temperature. A longer holding time at 200 °C led to an improvement in impact strength by a factor of more than three. However, the permeation properties decreased by about 50 %, indicating that peroxide cross-linking in the melt inhibited the formation of crystalline regions.

scholarly journals Filling of Mater-Bi with Nanoclays to Enhance the Biofilm Rigidity

2018 ◽  
Vol 9 (4) ◽  
pp. 60 ◽  
Author(s):  
Giuseppe Cavallaro ◽  
Giuseppe Lazzara ◽  
Lorenzo Lisuzzo ◽  
Stefana Milioto ◽  
Filippo Parisi
Keyword(s):  
Tensile Properties ◽  
Food Packaging ◽  
Mechanical Response ◽  
Materials Science ◽  
Traction Force ◽  
Tensile Tests ◽  
Mechanical Analysis ◽  
Nanocomposite Films ◽  
Preliminary Study ◽  
Mechanical Performances

We investigated the efficacy of several nanoclays (halloysite, sepiolite and laponite) as nanofillers for Mater-Bi, which is a commercial bioplastic extensively used within food packaging applications. The preparation of Mater-Bi/nanoclay nanocomposite films was easily achieved by means of the solvent casting method from dichloroethane. The prepared bio-nanocomposites were characterized by dynamic mechanical analysis (DMA) in order to explore the effect of the addition of the nanoclays on the mechanical behavior of the Mater-Bi-based films. Tensile tests found that filling Mater-Bi with halloysite induced the most significant improvement of the mechanical performances under traction force, while DMA measurements under the oscillatory regime showed that the polymer glass transition was not affected by the addition of the nanoclay. The tensile properties of the Mater-Bi/halloysite nanotube (HNT) films were competitive compared to those of traditional petroleum plastics in terms of the elastic modulus and stress at the breaking point. Both the mechanical response to the temperature and the tensile properties make the bio-nanocomposites appropriate for food packaging and smart coating purposes. Here, we report a preliminary study of the development of sustainable hybrid materials that could be employed in numerous industrial and technological applications within materials science and pharmaceutics.

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