Investigations on mechanical and morphological characterization of chitosan reinforced polymer nanocomposites

Soundhar, A.; Kandasamy, Jayakrishna

doi:10.1088/2053-1591/ab1288

Cited by 18 publications

(6 citation statements)

References 44 publications

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“…At the same time, A3, A4, A5, and A6 composites have lower tensile strength compared to the A1 and A2 composites, due to the non-uniform dispersal and agglomeration of CTS in SF and GF interface. This interface makes the A3, A4, A5, and A6 composites into an amorphous structure that leads to a premature failure even at low strain rate [43]. The influences of reinforcement on the tensile strength of hybrid GF/SF/CTS composites are shown in Figure 3.…”

Section: Tensile Properties Of the Composite Scaffoldsmentioning

confidence: 99%

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Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

et al. 2020

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This study aims to explore the mechanical properties of hybrid glass fiber (GF)/sisal fiber (SF)/chitosan (CTS) composite material for orthopedic long bone plate applications. The GF/SF/CTS hybrid composite possesses a unique sandwich structure and comprises GF/CTS/epoxy as the external layers and SF/CTS/epoxy as the inner layers. The composite plate resembles the human bone structure (spongy internal cancellous matrix and rigid external cortical). The mechanical properties of the prepared hybrid sandwich composites samples were evaluated using tensile, flexural, micro hardness, and compression tests. The scanning electron microscopic (SEM) images were studied to analyze the failure mechanism of these composite samples. Besides, contact angle (CA) and water absorption tests were conducted using the sessile drop method to examine the wettability properties of the SF/CTS/epoxy and GF/SF/CTS/epoxy composites. Additionally, the porosity of the GF/SF/CTS composite scaffold samples were determined by using the ethanol infiltration method. The mechanical test results show that the GF/SF/CTS hybrid composites exhibit the bending strength of 343 MPa, ultimate tensile strength of 146 MPa, and compressive strength of 380 MPa with higher Young’s modulus in the bending tests (21.56 GPa) compared to the tensile (6646 MPa) and compressive modulus (2046 MPa). Wettability study results reveal that the GF/SF/CTS composite scaffolds were hydrophobic (CA = 92.41° ± 1.71°) with less water absorption of 3.436% compared to the SF/CTS composites (6.953%). The SF/CTS composites show a hydrophilic character (CA = 54.28° ± 3.06°). The experimental tests prove that the GF/SF/CTS hybrid composite can be used for orthopedic bone fracture plate applications in future.

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Section: Tensile Properties Of the Composite Scaffoldsmentioning

confidence: 99%

“…They found that the addition of CTS up to 4 wt% enhanced the flexural (47%) and tensile strength (80%). They also observed that the hemolytic ratio was less than 5% at 4 wt% of CTS, which makes it suitable for orthopedic applications [43]. Table 1 shows the mechanical characteristics and application of hybrid polymer composites in details.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

et al. 2020

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“…Each group of specimens was tested more than five times, and the test results were averaged. The impact sample is a standard spline (800 mm × 10 mm × 4 mm), which is notched according to the standard ASTM D256 [29]. After the spline was placed in the laboratory environment for 24 h, the impact test was carried out with a 5J pendulum by using an electronic cantilever impact tester (Chengde Jinjian Testing Instrument Co., Ltd., Chengde, China).…”

Section: Characterizationmentioning

confidence: 99%

Effect of Diisocyanates as Compatibilizer on the Properties of BF/PBAT Composites by In Situ Reactive Compatibilization, Crosslinking and Chain Extension

et al. 2020

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Due to the hydrophobic nature of poly (butylene terephthalate) (PBAT), and the hydrophilic nature of bamboo flour (BF), a BF/PBAT (50/50) blend shows low mechanical properties, and especially shows poor impact strength. In order to increase the interfacial adhesion between BF and PBAT, diisocyanate was used as a reactive compatibilizer to modify bamboo powder. A series of BF/PBAT composites were prepared by the method of mixing and melting in an internal mixer. After adding reactive compatibilizer 4,4 -methylenebis(phenyl isocyanate) (MDI), BF/PBAT (50/50) composites with high mechanical properties were successfully prepared. The tensile strength, elongation at break, and impact strength of the BF/MDI-2/PBAT composite with 2 wt % MDI content were increased by 1.9, 6.8, and 4.3 times respectively over the BF/PBAT blend without the added MDI. The higher toughening effect of MDI in BF/PBAT composites can be mainly ascribed to the improved interface bonding between BF and PBAT. The isocyanate group of MDI can react with the hydroxyl group on the BF surface and in situ formation of the carbamate group on the BF surface. The residual isocyanate can then react with the hydroxyl group of PBAT and form carbamate groups. The rheological behaviors demonstrate that addition of appropriate amounts of MDI, 1 wt % and 2 wt %, can promote the flowability of the molten BF/PBAT composites due to the decrease in interparticle interaction between bamboo powder and the increase in the thermal motion of the molecules.Bamboo fiber is composed of cellulose, lignin, hemicellulose, and other macromolecules, which have strong rigidity. In addition, it has the advantages of antibacterial, low cost, and high recovery rate. More significantly, bamboo flour can not only be used as a reinforcement, but also can act as a nucleation agent to improve the crystallization performance and crystallization rate of the composite [3,7-9].

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“…As per the ASTM F756 standard, the allowable hemolysis percentage of any biomaterial is below 5%. 52 A higher hemolysis percentage means potential toxicity as the red blood cells rupture when in contact with the material. Hence, a hemolysis test was performed for the prepared nanocomposite with the highest nanohybrid content (i.e., 1.00% for IO@CNF1.00/TAE) at three different concentrations (1 mg, 5 mg, and 10 mg).…”

Section: Hemolysis Studymentioning

confidence: 99%

A robust epoxy nanocomposite with iron oxide decorated cellulose nanofiber as a sustained drug delivery vehicle for antibacterial drugs

Borah,

Rather,

Bhar

et al. 2023

New J. Chem.

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Investigations on mechanical and morphological characterization of chitosan reinforced polymer nanocomposites

Cited by 18 publications

References 44 publications

Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

Investigations on the Mechanical Properties of Glass Fiber/Sisal Fiber/Chitosan Reinforced Hybrid Polymer Sandwich Composite Scaffolds for Bone Fracture Fixation Applications

Effect of Diisocyanates as Compatibilizer on the Properties of BF/PBAT Composites by In Situ Reactive Compatibilization, Crosslinking and Chain Extension

A robust epoxy nanocomposite with iron oxide decorated cellulose nanofiber as a sustained drug delivery vehicle for antibacterial drugs

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