Strong and transparent PMMA sheet reinforced with amine functionalized BN nanoflakes for UV-shielding application

Bisht, Ankita; Kumar, Vijayesh; Maity, Palash Chandra; Lahiri, Indranil; Lahiri, Debrupa

doi:10.1016/j.compositesb.2019.107274

Cited by 49 publications

(29 citation statements)

References 49 publications

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“…Using boron powder and metal oxide as reactants under chemical vapor deposition method and a 1wt.% BNNTs fraction in PMMA, the elastic modulus of the composite was increased up to 19% [20]. The best results have been obtained so far when using amine functionalized BN nanoflakes which were entrained in PMMA sheet to improve the mechanical properties of the composite [21]. In this work, modulus of elasticity and strength were increased by 148% and 155%, respectively, at BN concentration of 2% per weight.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hexagonal Boron nitride Nanopowder Reinforcement and Mixing Methods on Physical and Mechanical Properties of Self-Cured PMMA for Dental Applications

Alqahtani

2020

Materials

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We report for the first time on the effect of biocompatible hexagonal boron nitride (h-BN) nanopowder reinforcement with different concentrations on the structural and mechanical properties of fabricated self-cured polymethyl methacrylate (PMMA) based dental materials (GC UNIFAST III). A comparison among the structural and mechanical properties between hand and ultrasonic mixing is also presented. Fabricated specimens were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR), micro indentation, and flexural strength techniques. The ultrasonic mixing method provides better sample textures of the composite as compared to hand mixing. It is found that XRD and IR intensity of the peaks increases with the increase of h-BN concentration due to nanocomposite formation. The additions of h-BN nanoparticles to the acrylic resin enhanced the hardness and the flexibility values of the composites. Independently of the mixing method used, adding h-BN nanopowder relatively increases the Vickers Hardness numbers (VH) and Flexural Strength (FS) of the unmodified materials. However, using ultrasonic mixing method combined with h-BN nanopowder increases VH numbers to 300% and FS values to 550% with respect to the unmodified sample made by hand mixing. The results obtained are very encouraging and will support future research in vivo, to confirm whether PMMA loaded with h-BN nanoparticles is an improvement compared to current dental restorative materials.

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Section: Introductionmentioning

confidence: 99%

Effect of Hexagonal Boron nitride Nanopowder Reinforcement and Mixing Methods on Physical and Mechanical Properties of Self-Cured PMMA for Dental Applications

Alqahtani

2020

Materials

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“…The BNNS is considered as one of the promising UV-filters that can be incorporated into polymer materials to modify the UV-filtering properties of the composites 204 . For example, Bisht et al 211 investigated the PMMA composites using amine-functionalized BN nanoflakes where 0.5 wt.% BN nanoflakes incorporated PMMA composites shielded UV-wavelength (UV-B and UV-C) by 325% while retaining high transparency of 65% to visible light. However, increasing the BN nanoflakes loading improves the UV-blocking properties as well as reduces the transparency of the nanocomposites.…”

Section: Optical Propertiesmentioning

confidence: 99%

2D boron nitride nanosheets for polymer composite materials

et al. 2021

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Hexagonal boron nitride nanosheets (BNNSs) are promising two-dimensional materials to boost the mechanical, thermal, electrical, and optical properties of polymer nanocomposites. Yet, BNNS-polymer composites face many challenges to meet the desired properties owing to agglomeration of BNNSs, incompatibility, and weak interactions of BNNSs with the host polymers. This work systematically reviews the fundamental parameters that control the molecular interactions of BNNSs with polymer matrices. The surface modification of BNNSs, as well as size, dispersion, and alignment of these nanosheets have a profound effect on polymer chain dynamics, mass barrier properties, and stress-transfer efficiency of the nanocomposites.

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“…With the evolution of material science, polymer has been widely used in various fields, such as biomedicine, 1 molecular separations, 2 and optical science, 3‐6 because of its outstanding nontoxicity, low cost, easy processability, and good chemical resistance 7‐9 . However, the inherent characteristics, for instance, the inflammability 10 and nasty electrical conductivity, restrict the applied range of polymer.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of multifunctional polymethyl methacrylate composites based on phosphorus‐containing polyaniline with excellent flame retardancy and electrical conductivity

Zhan

Wang

Zhang

et al. 2020

Polymers for Advanced Techs

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After the incorporation of the polyaniline (PANI), polymethyl methacrylate (PMMA) composites with outstanding electrical conductivity had been widely used in sensors. However, the flame retardancy of PMMA composites seriously restrained its further application. Thus, phosphorus‐containing polyaniline (FR‐PANI) was successfully prepared and combined with PMMA. The flame retardancy, electrical conductivity, thermal stability, and fire behavior of the resultant PMMA/FR‐PANI composites were systematically studied. When the loading amount of FR‐PANI was controlled at 20 wt%, the PMMA matrix was endowed with dramatic flame retardancy, exhibiting a limiting oxygen index of 29.1% and a UL‐94 V‐0 rating in vertical burning tests. Meanwhile, the volume resistivity was also reduced up to 0.5 MΩ. The thermal stability of the PMMA/FR‐PANI composites was enhanced by the formation of abundant char residue, which improved the fire behavior of the PMMA matrix. The effect of FR‐PANI on the flame retardancy of the PMMA matrix was deduced on the basis of thermogravimetry‐infrared, Fourier transform infrared, and scanning electron microscopic analyses. The phosphorus‐containing functional groups in the FR‐PANI molecular chain underwent thermal degradation in the condensed phase and promoted the formation of a char layer. The char layer, in turn, prevented heat transfer into the interior of the PMMA composites, serving as a barrier to the volatilization of flammable micromolecules. Therefore, FR‐PANI is an important candidate to extend the range of applications of PMMA to include multifunctional intelligent sensors.

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Strong and transparent PMMA sheet reinforced with amine functionalized BN nanoflakes for UV-shielding application

Cited by 49 publications

References 49 publications

Effect of Hexagonal Boron nitride Nanopowder Reinforcement and Mixing Methods on Physical and Mechanical Properties of Self-Cured PMMA for Dental Applications

Effect of Hexagonal Boron nitride Nanopowder Reinforcement and Mixing Methods on Physical and Mechanical Properties of Self-Cured PMMA for Dental Applications

2D boron nitride nanosheets for polymer composite materials

Fabrication of multifunctional polymethyl methacrylate composites based on phosphorus‐containing polyaniline with excellent flame retardancy and electrical conductivity

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