Multiwalled Carbon Nanotube/Polysulfone Composites

Dooher, Thomas; Dixon, Dorian; McIlhagger, Alistair

doi:10.1177/0892705710391621

Cited by 14 publications

(7 citation statements)

References 33 publications

(33 reference statements)

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“…CNT has tendency to form agglomerate in polymer matrix due to strong van der Waals interactions and this property limits its applications. Different methods are applied to exceed this agglomeration problem including solution mixing, 15,16 in situ polymerization, 17,18 melt mixing, 19 –21 addition of appropriate compatibiliser, 22,23 and surface modification 24,25 of CNT with appropriate surface groups to achieve better interfacial adhesion with polymer matrix. Melt mixing is one of the most useful methods especially for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Investigating mechanical, thermal, and flammability properties of thermoplastic polyurethane/carbon nanotube composites

Kanbur

Tayfun

2017

Journal of Thermoplastic Composite Materials

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Thermoplastic polyurethane (TPU) composites containing carbon nanotube (CNT) with the loading ratios from 0.5wt% to 2 wt% were prepared using melt-compounding process. Surfaces of the CNT particles were treated with sulfuric acid/nitric acid to purify CNT and to achieve compatible surface characteristics between TPU matrix and CNT. Mechanical, thermal, flame retardant, melt flow, and morphological properties of TPU/CNT composites were investigated. Addition of CNT to TPU matrix causes in a prominent increase in tensile strength, percentage of elongation at break, and tensile modulus values of TPU. The mechanical properties are improved for lower modified CNT loadings. CNT inclusions also improve the thermal stability of pristine TPU. Addition of CNT into TPU matrix causes increase in melting and decomposition temperatures of TPU and decrease in glass transition temperature. The flammability parameters of TPU also shift to higher values after CNT loadings to matrix. Modified CNT additions at higher concentrations exhibit better fire performance. Additions of modified CNT and pristine CNT show different trends in the case of melt flow rate values. Modified CNTs disperse more homogeneously relative to pristine ones into TPU matrix which is due to improvement in interfacial interactions between CNT and TPU.

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Section: Introductionmentioning

confidence: 99%

Investigating mechanical, thermal, and flammability properties of thermoplastic polyurethane/carbon nanotube composites

Kanbur

Tayfun

2017

Journal of Thermoplastic Composite Materials

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“…Figure S3a in the Supporting Information compares the number of samples that overcame the steps to the total number of fabricated samples, when the Ag/MWCNT composite patterns were made with the 0.15 wt % MWCNT ink across the steps with heights of 240 and 300 μm. By observing the optical images shown in Figure S3b–d, we found that the concentration limit of MWCNT is 1 wt % because the composite pattern started to have aggregated MWCNT clusters reducing the conductivity of the patterns. , However, in the case of AgNW, it could be found that the maximum step height remained proportional to the concentration of AgNW without the clustering problem. Moreover, R s was inversely proportional to the concentration.…”

Section: Resultsmentioning

confidence: 96%

Three-Dimensionally Printed Interconnects for Smart Contact Lenses

Kim

Kang

et al. 2018

ACS Appl. Mater. Interfaces

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One of the ultimate wearable heath-monitoring gears, smart contact lens, requires miniaturized devices compounded and interconnected with each other on the lens for a successful system functioning. Because of the different device thickness, the interconnect patterns need to be three-dimensional (3D) conforming the steps given by the diversified on-lens devices. Also, the patterns should be low-temperature processed and flexible considering the mechanical and thermal property of the lens material. We demonstrate the 3D interconnects electrosprayed on a contact lens platform with Ag-Ag nanowire (NWs) composite ink conforming the steps. Quantitative and informative analysis on the interconnects is presented. Thick polyimide film (12.5 μm) in C-shape is employed as a primary substrate to form the 3D patterns that is to be transferred onto the contact lens. The AgNWs act as frames to support the Ag ion inks printed across the steps. The resultant interconnects realized with the Ag/AgNW composite ink with 0.3 wt % AgNW have the sheet resistance ( R) of 0.396 Ω/□ spanning the height difference of 300 μm. AgNWs also provide durability to the patterns against crack formation and propagation under significant device deformation. Unlike pure Ag pattern which shows the R changes of 86.1% in the bending condition, the optimally formulated composite pattern shows the suppressed R change of only 15.2% with a bending radius of 3 mm.

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“…The performed analyzes showed an improvement of CNT stability after the modification processes, with a higher increase in NMP and DMF compared to THF. Both mechanical tests and thermal analysis confirmed the presence of a residual solvent in all samples as a plasticizer, resulting in a significant reduction in the glass transition temperature (Tg) [42]. Subsequently, symmetric polymeric membranes were obtained and characterized instead of asymmetric membranes by solvent evaporation method, using polysulfone as polymer and CNT-amino as additives.…”

Section: Synthesis Characterization and Propertiesmentioning

confidence: 88%

Polysulfone Composite Membranes with Carbonaceous Structure. Synthesis and Applications

2020

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The present review deals with the latest progress in the field of polysulfone composite membranes with carbon nanotubes, carbon fiber and graphene from both perspectives-synthesis and applications. These two fillers, extensively used in the last few years due to their remarkable properties, induce a high value character to the composite materials. On the other hand, polysulfone is one the most used polymers for preparing polymeric membranes due to its high versatility in a wide range of solvents and also to the properties of this remarkable polymer. All types of synthesis method were presented and also a large number of applications from industrial to biomedical were presented and discussed.

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Multiwalled Carbon Nanotube/Polysulfone Composites

Cited by 14 publications

References 33 publications

Investigating mechanical, thermal, and flammability properties of thermoplastic polyurethane/carbon nanotube composites

Investigating mechanical, thermal, and flammability properties of thermoplastic polyurethane/carbon nanotube composites

Three-Dimensionally Printed Interconnects for Smart Contact Lenses

Polysulfone Composite Membranes with Carbonaceous Structure. Synthesis and Applications

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