Synthesis and characterization of functionalized MWCNTs/PMMA composites: device fabrication for RH sensing

Qazi, Raina Aman; Khan, Mohammad Saleem; Siddiq, Muhammad; Shah, Luqman Ali; Ali, Muhammad

doi:10.1080/25740881.2020.1759631

Cited by 8 publications

(11 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, an increase in absorbance confirmed the presence of A-MWCNTs. Similarly, the bands at 1020 and 1122 cm –1 are also evidence for A-MWCNTs. , In the characteristic peak of −NH 2 a red shift was observed from 3350 to 3336 cm –1 and 1656 to 1652 cm –1 , which indicates the interaction between A-MWCNTs and the hydrogel network in the form of H-bonding. The combination of hydrophobic interactions and H-bonding enhances the mechanical properties of hydrogels.…”

Section: Resultsmentioning

confidence: 80%

“…These hydrophobic associations partially interact with PAM to form crosslinking points that contribute to the dissipation of the energy during the stretching process. , Meanwhile, different amounts of functionalized A-MWCNTs were added to the solution and dispersed through the ultrasonic bath. According to our previous study, A-MWCNTs contain active groups which form another type of physical bonding, that is, intermolecular hydrogen bonding, with the polymer chain . These hydrogen bonds further improve the mechanical properties of the gels with hydrophobic associations.…”

Section: Resultsmentioning

confidence: 98%

“…Second, 0.5 mL of LM was added with continuous stirring to obtain a homogeneous solution. Different amounts, 12.5 mg (0.5%), 25 mg (1%), and 37.5 mg (1.5%), of A-MWCNTs (previously functionalized by our group) were dispersed through an ultrasonic bath for 2.5 h. After that, 2 g of Amm and 0.05 g of APS were added to the homogeneous solution and stirred to dissolve both of the chemicals. The solution was kept in a plastic mold having a length of 7 cm and a width of 5 cm at 60 °C for 2.5 h. After 2.5 h, the gels were removed from the mold and cooled.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Hydrophobically Associated Functionalized CNT-Reinforced Double-Network Hydrogels as Advanced Flexible Strain Sensors

Khan

Shah

Rahman

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Hydrogels have gained the attention of researchers worldwide and can be widely applied for use in medical technologies in human health and in industrial applications such as robotics. However, producing a hydrogel with proper mechanical properties, low hysteresis energy, quick shape recovery, and long-range strain sensitivity is still an ongoing development. More development into hydrogel technology could also lead to an increase in the effectiveness and lifespan of artificial joint replacements. Our hydrogels can be incorporated into the development of highly sensitive strain sensors for wearable electronic devices. To work toward developing these technologies, multifunctional dual crosslinked hydrogels were developed using lauryl methacrylate, acrylamide, and acid-functionalized multiwalled carbon nanotubes (A-MWCNTs). Due to the dual crosslinking, the synthesized hydrogels display outstanding mechanical performance (high fracture stress, strain, toughness, and tensile strength). In shape recovery, the materials recover their original shape after compression and maintain hydrostaticity. A low hysteresis energy of 11.57 kJ m −3 makes it a suitable candidate for strain sensing with high sensitivity (GF = 9.2 at 500% strain) to monitor different human motions (wrist, neck movements, flexion of the fingers, swallowing, and during speaking). Additionally, due to its good mechanical properties, the cyclic stability was monitored up to 300 cycles and the hydrogel still was mechanically stable and had the fastest response−recovery time of less than 130 ms during mechanical performance studies. Our hydrogels can be used to develop highly sensitive strain sensors for wearable electronic devices.

show abstract

Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Hydrophobically Associated Functionalized CNT-Reinforced Double-Network Hydrogels as Advanced Flexible Strain Sensors

Khan

Shah

Rahman

et al. 2022

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

“…Moreover, the disappearance of the NH 2 stretching band (3470 cm −1 and 3420 cm −1 ) of 4,4′‐Diaminodiphenyl sulfone in Daps‐POP and turning to the NH bands (3364 cm −1 ) is another reason confirming the successful reaction of the building blocks. Also the bands of the sulfone scaffold have appeared at 1118 cm −1 (symmetric SO 2 stretching) and 1316 cm −1 (asymmetric SO 2 stretching) with an evident knee at 1209 cm −1 suggesting the presence of sulfone moieties in the Daps‐POP network 35,36 …”

Section: Resultsmentioning

confidence: 99%

Synthesis and application of amine‐sulfone‐rich mesoporous organic polymer for the ultrafast removal of both cationic and anionic organic pollutants from industrial wastewaters

Zargoosh

Naghshineh

Soltani

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Water pollution is becoming an up-rising threat to the environment and human being in recent years and turning to a major global challenge. The wastewaters released by the textile and dyestuff industries are one of the major sources of contamination. The aim of this work is preparation of stable, reusable, and fast adsorbent for complete removal of both cationic and anionic pollutants from industrial wastewaters. To obtain these goals, an amine-sulfone-rich mesoporous organic polymer (Daps-POP) was synthesized, structurally characterized and applied for removing of methylene blue (MB) and direct blue 108 (DB-108) as cationic and anionic model dye pollutants, respectively.The affecting variables on the adsorption process were optimized and the possible adsorbate-adsorbent interactions were identified. The synthesized Daps-POP was applied to industrial wastewaters and presents complete removal of model dye pollutants proving the idea of using POPs in industrial wastewater treatments. The equilibrium adsorption capacity (q e ) found to be 48.1 mg.g À1 and 25.64 mg.g À1 for MB and DB-108, respectively. The adsorption takes place in only 5 min for both dyes. Moreover, the reusability of the Daps-POP was successful during three consecutive runs corroborating its promising application in industrial water treatment.

show abstract

“…On the contrary, the formation of hydrogen bonds between hydrophilic PEO and water molecules enhances the humidity sensing response [ 10 ]. Moreover, the large surface area of MWCNT nanostructures as well as the incorporation of −COOH functional side groups create active sites for the adsorption of vapor molecules [ 55 ].…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

et al. 2021

View full text Add to dashboard Cite

Polymer composites are favorite materials for sensing applications due to their low cost and easy fabrication. In the current study, composite nanofibers consisting of polyethylene oxide (PEO), oxidized multi-walled carbon nanotubes (MWCNT) and copper oxide (CuO) nanoparticles with 1% and 3% of fillers (i.e., PEO–CuO–MWCNT: 1%, and PEO–CuO–MWCNT: 3%) were successfully developed through electrospinning for humidity sensing applications. The composite nanofibers were characterized by FTIR, XRD, SEM and EDX analysis. Firstly, they were loaded on an interdigitated electrode (IDE), and then the humidity sensing efficiency was investigated through a digital LCR meter (E4980) at different frequencies (100 Hz–1MHz), as well as the percentage of relative humidity (RH). The results indicated that the composite nanofibers containing 1% and 3% MWCNT, combined with CuO in PEO polymer matrix, showed potent resistive and capacitive response along with high sensitivity to humidity at room temperature in an RH range of 30–90%. More specifically, the PEO–CuO–MWCNT: 1% nanocomposite displayed a resistive rapid response time within 3 s and a long recovery time of 22 s, while the PEO–CuO–MWCNT: 3% one exhibited 20 s and 11 s between the same RH range, respectively.

show abstract

Synthesis and characterization of functionalized MWCNTs/PMMA composites: device fabrication for RH sensing

Cited by 8 publications

References 51 publications

Hydrophobically Associated Functionalized CNT-Reinforced Double-Network Hydrogels as Advanced Flexible Strain Sensors

Hydrophobically Associated Functionalized CNT-Reinforced Double-Network Hydrogels as Advanced Flexible Strain Sensors

Synthesis and application of amine‐sulfone‐rich mesoporous organic polymer for the ultrafast removal of both cationic and anionic organic pollutants from industrial wastewaters

Highly Sensitive Humidity Sensors Based on Polyethylene Oxide/CuO/Multi Walled Carbon Nanotubes Composite Nanofibers

Contact Info

Product

Resources

About