Cassava starch-kaolinite composite films. Thermal and mechanical properties related to filler-matrix interactions

Aggregated boron nitride (ABN) is advantageous for increasing the packing and thermal conductivity of the matrix in composite materials, but can deteriorate the mechanical properties by breaking during processing. In addition, there are few studies on the use of Ti3C2 MXene as thermally conductive fillers. Herein, the development of a novel composite film is described. It incorporates MXene and ABN into poly(vinyl alcohol) (PVA) to achieve a high thermal conductivity. Polysilazane (PSZ)-coated ABN formed a heat conduction path in the composite film, and MXene supported it to further improve the thermal conductivity. The prepared polymer composite film is shown to provide through-plane and in-plane thermal conductivities of 1.51 and 4.28 W/mK at total filler contents of 44 wt.%. The composite film is also shown to exhibit a tensile strength of 11.96 MPa, which is much greater than that without MXene. Thus, it demonstrates that incorporating MXene as a thermally conductive filler can enhance the thermal and mechanical properties of composite films.

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Polylactide/graphene nanoplatelets composite films: Impact of high‐pressure on topography, barrier, thermal, and mechanical properties

Polymer Composites ◽

10.1002/pc.26023 ◽

2021 ◽

Author(s):

Jasim Ahmed ◽

Mehrajfatema Z. Mulla ◽

Aateka Vahora ◽

Anibal Bher ◽

Rafael Auras

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

Composite Films ◽

Graphene Nanoplatelets ◽

Thermal And Mechanical Properties

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Processing and Characterisation of Banana Leaf Fibre Reinforced Thermoplastic Cassava Starch Composites

Polymers ◽

10.3390/polym13091420 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1420

Author(s):

Ridhwan Jumaidin ◽

Nuraliah Ahmad Diah ◽

R. A. Ilyas ◽

Roziela Hanim Alamjuri ◽

Fahmi Asyadi Md Yusof

Keyword(s):

Mechanical Properties ◽

Decomposition Temperature ◽

Cassava Starch ◽

Thermal And Mechanical Properties ◽

Good Adhesion ◽

Intermolecular Hydrogen Bonds ◽

Morphological Studies ◽

Ft Ir ◽

Banana Leaf ◽

Thermal Stability Of

Increasing environmental concerns have led to greater attention to the development of biodegradable materials. The aim of this paper is to investigate the effect of banana leaf fibre (BLF) on the thermal and mechanical properties of thermoplastic cassava starch (TPCS). The biocomposites were prepared by incorporating 10 to 50 wt.% BLF into the TPCS matrix. The samples were characterised for their thermal and mechanical properties. The results showed that there were significant increments in the tensile and flexural properties of the materials, with the highest strength and modulus values obtained at 40 wt.% BLF content. Thermogravimetric analysis showed that the addition of BLF had increased the thermal stability of the material, indicated by higher-onset decomposition temperature and ash content. Morphological studies through scanning electron microscopy (SEM) exhibited a homogenous distribution of fibres and matrix with good adhesion, which is crucial in improving the mechanical properties of biocomposites. This was also attributed to the strong interaction of intermolecular hydrogen bonds between TPCS and fibre, proven by the FT-IR test that observed the presence of O–H bonding in the biocomposite.

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Synergistic effect of titanium dioxide (TiO2) and ionizing radiation on thermal and mechanical properties of carboxymethyl cellulose (CMC) for potential application in removal of basic dye from wastewater

10.21203/rs.3.rs-161064/v1 ◽

2021 ◽

Author(s):

Yasser Gad ◽

Hussein E. Ali ◽

El-Sayed A. Hegazy

Keyword(s):

Mechanical Properties ◽

Titanium Dioxide ◽

Carboxymethyl Cellulose ◽

Composite Films ◽

Diagnostic Procedures ◽

Absorption Capacity ◽

Order Kinetic ◽

Thermal And Mechanical Properties ◽

Prepared Composite ◽

Set Up

Abstract Carboxymethyl cellulose (CMC)/titanium dioxide (TiO2) was prepared using gamma irradiation at different doses. Carboxymethyl cellulose was used as a matrix and TiO2 in different contents was added (0.25, 0.5, 1, 1.5 wt %) as a filler. The polymer composite film were irradiated at doses of 5, 10 and15 kGy using 60Co γ-ray to form crosslinked network structure. The prepared composite films were described by different diagnostic procedures including X-ray diffractometer, scanning electron microscope (SEM), FTIR as well as thermal and mechanical properties measurements. CMC/TiO2 composite films was used for removal of basic Violet 7 dye. The adsorption of the dye follows the Langmuir model a with chemical monolayer adsorption behavior. Adsorption kinetic of dyes was set up to be regular to pseudo second order kinetic model. The results showed that the prepared composite films significantly removed this basic violet 7 dye with maximum absorption capacity (123.6 mg/g).

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Flexible and High Thermal Conductivity Composites Based on Graphite Nanoplates Paper Impregnated with Polydimethylsiloxane

Journal of Composites Science ◽

10.3390/jcs5120309 ◽

2021 ◽

Vol 5 (12) ◽

pp. 309

Author(s):

Daniele Battegazzore ◽

Erica Fadda ◽

Alberto Fina

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Deposition Time ◽

Electronic Devices ◽

Composite Films ◽

Thermal And Mechanical Properties ◽

Wide Range ◽

High Flexibility ◽

Highly Porous

This paper deals with the design, preparation, and characterization of conductive and flexible nanopapers based on graphite nanoplates (GNP) and polydimethylsiloxane (PDMS). Highly porous GNP nanopapers were first prepared by filtration from a GNP suspension in a solvent. Subsequently, PDMS impregnation was carried out to obtain a composite material. By varying the concentration of the polymer solution and the deposition time, PDMS/GNP nanopapers were produced with a wide range of PDMS contents, porosities, and densities. Thermal diffusivity of the composite films (both in-plane and cross-plane) were measured and correlated with the structure of the nanopapers. Selected formulations were investigated in detail for their physical, thermal, and mechanical properties, exhibiting high flexibility and resistance to more than 50 repeated bendings, stiffness of up to 1.3 MPa, and thermal conductivity of up to 25 W/m∙K. Based on the properties obtained, the materials presented in this paper may find applications in modern lightweight and flexible electronic devices.

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Thermal and Mechanical Properties of Silica–Lignin/Polylactide Composites Subjected to Biodegradation

Materials ◽

10.3390/ma11112257 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2257 ◽

Cited By ~ 7

Author(s):

Aleksandra Grząbka-Zasadzińska ◽

Łukasz Klapiszewski ◽

Sławomir Borysiak ◽

Teofil Jesionowski

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Crystallization Behavior ◽

Composite Films ◽

Thermal And Mechanical Properties ◽

Scanning Calorimetry ◽

Nonisothermal Crystallization ◽

Hybrid Filler ◽

Hybrid Fillers ◽

Morphology Of Films

In this paper, silica–lignin hybrid materials were used as fillers for a polylactide (PLA) matrix. In order to simulate biodegradation, PLA/hybrid filler composite films were kept in soil of neutral pH for six months. Differential scanning calorimetry (DSC) allowed analysis of nonisothermal crystallization behavior of composites, thermal analysis provided information about their thermal stability, and scanning electron microscopy (SEM) was applied to define morphology of films. The influence of biodegradation was also investigated in terms of changes in mechanical properties and color of samples. It was found that application of silica–lignin hybrids as fillers for PLA matrix may be interesting not only in terms of increasing thermal stability, but also controlled biodegradation. To the best knowledge of the authors, this is the first publication regarding biodegradation of PLA composites loaded with silica–lignin hybrid fillers.

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