Thermal and mechanical properties of polyamide 12/graphene nanoplatelets nanocomposites and parts fabricated by fused deposition modeling

Zhu, Dingchun; Ren, Yuanyuan; Liao, Gang; Jiang, Shenlong; Li, Fenghua; Guo, Jianjun; Xu, Gaojie

doi:10.1002/app.45332

Cited by 136 publications

(99 citation statements)

References 51 publications

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“…Vaezi and Yang investigated the mechanical properties of PEEK for medical applications and obtained the maximum tensile strength at 75 MPa. Zhu et al examined the thermal and mechanical properties of PA12/GNPs composite; the maximum tensile strength and modulus for pure PA12, which was printed in the zero direction, were 43.8 MPa and 1.495 GPa, respectively. Tanikella et al investigated the tensile strength of commercially available polymer materials; the maximum tensile strengths for PC, ABS, and high impact polystyrene were 49.08, 28.75, and 21.41 MPa, respectively.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of Nozzle Temperature and Heat Treatment (Annealing) Effects on Mechanical Properties of High‐Temperature Polylactic Acid in Fused Deposition Modeling

Akhoundi

Nabipour

Hajami

et al. 2020

Polymer Engineering & Sci

107

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Fused deposition modeling (FDM) is the trendiest threedimensional (3D) printing method among additive manufacturing technologies. In this process, the final parts are constructed through layer-by-layer adhesion of thermoplastic polymers. Amorphous thermoplastic polymers have better printability compared to semicrystalline ones; so, they are most popular with FDM users. Generally, the overall mechanical properties of FDM 3D printed parts are weaker in comparison to the traditional methods (such as injection molding) due to the weak bonds between the deposited rasters and layers. Therefore, the introduction of new materials with higher mechanical properties and easy printing process of the semicrystalline polymers has always been challenging to progress the mechanical properties of the products. In this study by the FDM process, the effect of nozzle temperature and heat treatment (annealing) on the mechanical properties of high-temperature polylactic acids is investigated. The increase in the nozzle temperature develops the rasters and layers bonding, and the heat treatment of the parts after printing rises the crystallinity percentage, which is crucial for the improvement of mechanical properties. Experimental results show that an increase in the nozzle temperature raises the tensile strength and modulus to 65.7 MPa and 4.97 GPa, respectively. Furthermore, the heat treatment process increases the tensile strength and modulus up to 67.4 MPa and 5.65 GPa. The final tensile modulus values are the highest ones reported for pure materials printed by the FDM process. POLYM. ENG. SCI., 60:979-987, 2020.

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Section: Introductionmentioning

confidence: 99%

An Experimental Study of Nozzle Temperature and Heat Treatment (Annealing) Effects on Mechanical Properties of High‐Temperature Polylactic Acid in Fused Deposition Modeling

Akhoundi

Nabipour

Hajami

et al. 2020

Polymer Engineering & Sci

107

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“…Polyamides (PAs), commonly called nylon, have been used extensively as films to package foods, drugs, daily chemicals, and transported goods in the packaging industry because of their high properties, including a favorable puncture resistance and excellent oxygen‐barrier and satisfactory cold‐ and heat‐resistance qualities . Polyamide 6–66 (PA6‐66) is one of the most widely used PA copolymers in the packaging industry.…”

Section: Introductionmentioning

confidence: 99%

Effects of the biaxial orientation on the mechanical and optical properties and shrinkage of polyamide 6‐66–montmorillonite–nanosilica nanocomposite films

Liu

Yang

et al. 2019

J of Applied Polymer Sci

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Polyamide 6-66 (PA6-66)-montmorillonite (MMT)-nanosilica (NS) nanocomposite films were fabricated through a cast film process and then biaxially stretched on a laboratory stretcher. Uniaxial or biaxial stretching induced the elongated conformation of MMT and NS. The b axis of the α crystals and the amorphous phase were revealed to align along the machine direction (MD) after stretching, with the uniaxial orientation playing a more significant role. Furthermore, the crystallinity of PA6-66 stretching increased with the stretching ratio. Uniaxial stretching gave rise to a significantly enhanced tensile strength along the MD, whereas it slightly decreased the mechanical properties along the transverse direction (TD). In contrast, the films subjected to biaxial stretching exhibited more balanced mechanical properties. Uniaxial and biaxial stretching led to decreased transmittance and increased haze in the PA6-66-MMT-NS films; this could have been due to the elongated nanostructure of the two nanofillers, which inhibited the transmission and facilitated the scattering of visible light. The thermal shrinkage of the films increased with increasing stretching ratio, and the biaxially oriented films presented nearly equal shrinkage in the MD and TD. The addition of nanofillers decreased the shrinkage attributed to the mobility inhibition of the polymer chains during heating.

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“…PLA‐based nanocomposites with TA‐functionalized GNPs were first prepared (Figure ), and the uniform dispersion of GNPs in the nanocomposites and enhanced mechanical properties and thermal conductivity were observed. These nanocomposites are expected to have many potential applications in the areas of heat dissipation in LEDs and three‐dimensional printing materials for fused deposition modeling …”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal conductivity of PLA‐based nanocomposites by incorporation of graphite nanoplatelets functionalized by tannic acid

Lin

Pei

Zhang

2018

J of Applied Polymer Sci

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Enhancing thermal conductivity of polymeric nanocomposites remains a great challenge because of the poor compatibility between nanofillers and the polymeric matrix and the aggregation effect of nanofillers. We report the enhanced thermal conductivity of poly(lactic acid) (PLA)-based nanocomposites by incorporation of graphite nanoplatelets functionalized by tannic acid. Graphite nanoplatelets (GNPs) were noncovalently functionalized with tannic acid (TA) by van der Waals forces and p-p interaction without perturbing the conjugated sp 2 network, thus preserving the high thermal conductivity of GNPs. PLA-based nanocomposites with different contents of TA-functionalized GNPs (TA-GNPs) were prepared and characterized, and the influences of TA-GNPs content on the morphologies, mechanical properties, and thermal properties of the composites were investigated in detail. TA-GNPs remarkably improved the thermal conductivity of PLA up to 0.77 W/(m K), showing its high potential as a thermally conductive filler for polymer-based nanocomposites.

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Thermal and mechanical properties of polyamide 12/graphene nanoplatelets nanocomposites and parts fabricated by fused deposition modeling

Cited by 136 publications

References 51 publications

An Experimental Study of Nozzle Temperature and Heat Treatment (Annealing) Effects on Mechanical Properties of High‐Temperature Polylactic Acid in Fused Deposition Modeling

An Experimental Study of Nozzle Temperature and Heat Treatment (Annealing) Effects on Mechanical Properties of High‐Temperature Polylactic Acid in Fused Deposition Modeling

Effects of the biaxial orientation on the mechanical and optical properties and shrinkage of polyamide 6‐66–montmorillonite–nanosilica nanocomposite films

Enhanced thermal conductivity of PLA‐based nanocomposites by incorporation of graphite nanoplatelets functionalized by tannic acid

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