Synthesis, thermal, mechanical and rheological properties of multiwall carbon nanotube/waterborne polyurethane nanocomposite

Kuan, Hsu‐Chiang; Chen‐Chi, M.; Chang, Wei-Ping; Yuen, Siu-Ming; Wu, Hsin-Ho; Lee, Tzong‐Ming

doi:10.1016/j.compscitech.2005.02.017

Cited by 376 publications

(116 citation statements)

References 19 publications

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“…The CNTs after the adsorption process has three major peaks near 1200, 2400, 3450 cm −1 which are associated with groups (O-H), carbonyl groups (>C & O) and hydroxyl groups (-OH). This result acknowledges the results obtained in previous study [37][38][39][40][41]. …”

Section: Characterization Of Carbon Nanotubes (Cnts)supporting

confidence: 82%

Comparative Kinetic Study of Removal of Pb2+ Ions and Cr3+ Ions from Waste Water using Carbon Nanotubes Produced using Microwave Heating

Mubarak

Thobashinni

Abdullah

et al. 2016

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A comparative study of the removal of Pb 2+ ions and Cr 3+ ions was conducted to determine the efficiency of carbon nanotubes (CNTs) produced using microwave heating as an adsorbent in removing heavy metal ions from waste water. Optimization of parameters such as adsorbent dosage, pH value, agitation speed, and agitation time was done using the Design Expert software version 6.0. The statistical analysis revealed that optimized conditions for the highest removal for Pb 2+ are at pH 4.0, CNTs dosage of 0.09 g, agitation time and speed of 50 min and 150 rpm respectively. Meanwhile, the highest removal Cr 3+ ions was observed at pH 8.0, CNTs dosage of 0.09 g, agitation time and speed of 60 min and 150 rpm respectively. For the initial concentration of 2 mg/L, the removal efficiency of Pb 2+ ions and Cr 3+ ions were 99.9% and 95.5% respectively. The maximum adsorption capacities of both Pb 2+ ions and Cr 3+ ions onto the CNT were 15.34 mg/g for Pb 2+ ions and 24.45 mg/g for Cr 3+ ions. Besides that, the Langmuir and Freundlich constants for the removal of Pb 2+ ions were 0.073 and 1.438 L/mg while 0.071 and 1.317 L/mg for Cr 3+ ions. The statistical analysis proved that the removal of Pb 2+ ions and Cr 3+ ions fits the Langmuir and Freundlich isotherm models, and both models obeyed the pseudo-second-order.

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Section: Characterization Of Carbon Nanotubes (Cnts)supporting

confidence: 82%

Comparative Kinetic Study of Removal of Pb2+ Ions and Cr3+ Ions from Waste Water using Carbon Nanotubes Produced using Microwave Heating

Mubarak

Thobashinni

Abdullah

et al. 2016

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“…In order to improve the thermal properties of polyurethanes, researchers modify them mostly by incorporating nanoparticles [7,8] and proteins [9] or by changing the amount and type of monomers used for their synthesis [10]. To improve the mechanical properties of polyurethanes, often other polymers are used as modifiers for example epoxy resins [11][12][13][14]. Polyurethanes prepared with the use of suitable raw materials are biocompatible and may be biodegradable-this can be designed dependently on material destination [15,16].…”

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties of polyurethanes modified with L-ascorbic acid

Kucińska-Lipka

Gubańska

Sienkiewicz

2016

J Therm Anal Calorim

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In this study we report the thermal and mechanical properties of polyurethanes modified with ascorbic acid (AA). Ascorbic acid was used as a modifier at concentration of 1 or 2 mass%. The antioxidative properties of AA may improve the biocompatibility of the obtained materials, which were designed for biomedical applications. In this paper we describe characterization of obtained unmodified and ascorbic acid modified polyurethanes with the use of following methods: dynamic mechanical analysis, thermogravimetric analysis and mechanical tests including tensile strength, elongation at break, abrasive resistance, and hardness. Results of performed studies suggests that synthesized polyurethane materials may be suitable candidates for biomedical applications such as tissue scaffolds or implants, where required tensile strength is in the range of 1-14 MPa and elongation at break is approximately in the range of 100-380 %.

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“…Different polymer/CNT nanocomposites have been synthesized by incorporating CNTs into various polymer matrices, such as polyamides [12], polyimides [13][14][15], epoxy [16], polyurethane [17,18] and polypropylene [19][20][21]. Previous results indicated that the addition of small amounts of CNT (<1 wt%) to a matrix system can increase electric, thermal and mechanical properties without compromising the weight or processability of the composite.…”

mentioning

confidence: 99%

Improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube

Zhou¹,

Wu²,

Cheng³

et al. 2008

Express Polym. Lett.

180

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In this study, electrical, thermal and mechanical properties of multi-walled carbon nanotubes (CNTs) reinforced Epon 862 epoxy have been evaluated. Firstly, 0.1, 0.2, 0.3, and 0.4 wt% CNT were infused into epoxy through a high intensity ultrasonic liquid processor and then mixed with EpiCure curing agent W using a high speed mechanical agitator. Electric conductivity, dynamic mechanical analysis (DMA), three point bending tests and fracture tests were then performed on unfilled, CNT-filled epoxy to identify the loading effect on the properties of materials. Experimental results show significant improvement in electric conductivity. The resistivity of epoxy decreased from 1014 Ω•m of neat epoxy to 10 Ω•m with 0.4% CNT. The experimental results also indicate that the frequency dependent behavior of CNT/epoxy nanocomposite can be modeled by R-C circuit, permittivity of material increase with increasing of CNT content. DMA studies revealed that filling the carbon nanotube into epoxy can produce a 90% enhancement in storage modulus and a 17°C increase in Tg. Mechanical test results showed that modulus increased with higher CNT loading percentages, but the 0.3 wt% CNT-infusion system showed the maximum strength and fracture toughness enhancement. The decrease in strength and fracture toughness in 0.4% CNT/epoxy was attributed to poor dispersions of nanotubes in the composite

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Synthesis, thermal, mechanical and rheological properties of multiwall carbon nanotube/waterborne polyurethane nanocomposite

Cited by 376 publications

References 19 publications

Comparative Kinetic Study of Removal of Pb2+ Ions and Cr3+ Ions from Waste Water using Carbon Nanotubes Produced using Microwave Heating

Comparative Kinetic Study of Removal of Pb2+ Ions and Cr3+ Ions from Waste Water using Carbon Nanotubes Produced using Microwave Heating

Thermal and mechanical properties of polyurethanes modified with L-ascorbic acid

Improvement in electrical, thermal and mechanical properties of epoxy by filling carbon nanotube

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