Unique Halloysite Nanotubes–Polyvinyl Alcohol–Polyvinylpyrrolidone Composite Complemented with Physico–Chemical Characterization

Gaaz, Tayser Sumer; Kadhum, Abdul Amir H.; Michael, Patina Kiah Anak; Al-Amiery, Ahmed A.; Sulong, Abu Bakar; Nassir, Mohamed H.; Jaaz, Ahed Hameed

doi:10.3390/polym9060207

Cited by 24 publications

(11 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…HNTs do not require exfoliation because of their unique tubular structure and contain a few hydroxyl groups on the outer surface. Various polymer nanocomposites reinforced with HNTs have been investigated in thermoplastics [18,[21][22][23][24][25], thermosets [26][27][28][29], and elastomers [30,31]. As a result, Young's modulus, tensile strength, thermal stability, and fire-retardant properties are often improved.…”

Section: Introductionmentioning

confidence: 99%

Tribological and mechanical properties of polyamide-11/halloysite nanotube nanocomposites

Sahnoune

Kaci

Taguet

et al. 2018

Journal of Polymer Engineering

View full text Add to dashboard Cite

AbstractThis article reports some morphological, tribological, and mechanical data on polyamide-11(PA11)/halloysite nanotube (HNT) nanocomposites prepared by melt-compounding. HNTs extracted from the Djebel Debbagh deposit in Algeria were incorporated into the polymer at 1, 3, and 5 wt%. For comparison, commercial HNTs were also used under the same processing conditions. Scanning electron microscopy showed that both HNTs were homogeneously dispersed in the PA11 matrix, despite the presence of few aggregates, in particular at higher filler contents. The tribological properties were significantly improved, resulting in a decrease in the friction coefficient and the wear rate characteristics due to the lubricating effect of HNTs. This is consistent with optical profilometry data, which evidenced the impact of both types of HNTs on the surface topography of the nanocomposite samples, in which the main wear process was plastic deformation. Furthermore, Young’s modulus and tensile strength were observed to increase with the filler content, but to the detriment of elongation at break and impact strength. Regarding the whole data, the raw Algerian halloysite led to interesting results in PA11 nanocomposites, thus revealing its potential in polymer engineering nanotechnology.

show abstract

Section: Introductionmentioning

confidence: 99%

Tribological and mechanical properties of polyamide-11/halloysite nanotube nanocomposites

Sahnoune

Kaci

Taguet

et al. 2018

Journal of Polymer Engineering

View full text Add to dashboard Cite

show abstract

“…The AFM images also showed a certain variation in surface roughness between the CAP and CAP/0.08 wt% HNTs membranes 26 . The presence of HNTs within the composite membrane clearly decreased surface roughness 17 . Moreover, filled pores were appeared when examining the used CAP/0.08 wt% HNTs membrane, reflecting the salts present on the surface of that membrane.…”

Section: Resultsmentioning

confidence: 88%

“…The peaks appearing at 3695 and 3624 cm −1 could be attributed to the stretching vibration of the internal surface OH groups and the inner hydroxyl groups as well. The band at 3440 cm −1 in the CAP/HNTs spectrum reflected the formation of strong hydrogen bonding in the composite 17 . The peak at 2930 cm −1 in both the CAP and CAP/HNTs spectra can be ascribed to the CH 2 asymmetric stretching vibration.…”

Section: Resultsmentioning

confidence: 94%

Novel cellulose acetate propionate‐halloysite composite membranes with improved permeation flux, salt rejection, and antifouling properties

Alghamdi

El‐Zahhar

2020

Polymers for Advanced Techs

View full text Add to dashboard Cite

The fabrication of new membranes with improved performance for water desalination and other treatment is still an important strategy to overcome worldwide water scarcity and quality problems. In this study, cellulose acetate propionate/halloysite nanotube (HNT) composite membranes were prepared using the phase-inversion process, applying different concentrations of HNTs ranging from 0 to 0.11 wt%. The composite membranes' physicochemical properties were examined using thermogravimetric analysis, field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, and contact angle measurements. A dead-end filtration system was applied when examining the membranes' performance. The results showed clear improvements in the membrane hydrophilicity, permeability, salt rejection, antifouling, and stability properties with the addition of HNTs. The contact angle decreased from 69 to 38 , while the water uptake increased from 18% to 33%. Moreover, the permeation flux increased from 8 to 23 L m −2 h −1 at 1 bar, corresponding to an improvement of about 188%. The membrane containing 0.08 wt% of HNTs showed the optimal results, exhibiting salt rejection of 85% for sodium chloride and 95% for magnesium sulfate, corresponding to improvements of 109% and 154%, respectively, in addition to an improved flux recovery of 80% determined after 120 minutes.

show abstract

“…Based on the above data, PVP mainly affects the gas‐sensing properties of sensors by changing the morphology of ZnO micro/nanostructure in SDS‐PVP composite system. Referencing to recent research results of PVP‐SDS composite system, the mechanism of equivalent matching structure optimization performance is proposed . In our case, the samples are obtained from soft templates based on SDS and SDS‐PVP, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effect of PVP on gas‐sensing properties of ZnO micro/nanostructure materials in SDS‐PVP composite

Chen

Cui

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

ZnO is often used as gas sensor. In order to increase the sensitivity of the sensors, many methods are used to change the gas-sensing properties. In this paper, ZnO was synthesized by hydrothermal method using Zn (NO 3 ) 2 as a zinc source. Sodium lauryl sulfate (SDS) and polyvinylpyrrolidone (PVP) were added into the system to control microstructure and surface morphology of ZnO nanoparticles. The SDS was kept constant, and the PVP was changed. The morphology and composite were investigated by field emission scanning electron microscopy and X-ray diffraction.The chemical valence of the elements was determined by X-ray photoelectron spectroscopy. The sensing properties were investigated at different PVP components. It is found that ZnO has a red zinc structure. When the m SDS :m PVP = 1:1, the sensing sensitivity is best. The mechanism of equivalent matching structure optimization performance is proposed. K E Y W O R D S equivalent matching structure, gas sensor, nanoscale soft template, polyvinylpyrrolidone, sodium lauryl sulfate F I G U R E 3 XPS of: (A) Zn 2p spectra and (B) O 1s spectra of S 1 , S 2 , and S 3 [Color figure can be viewed at wileyonlinelibrary.com] F I G U R E 4 Optimal operating temperature of three sets of annealing samples. (A) Sensitivity vs operating temperature at 100 ppm ethanol atmosphere. (B) Sensitivity comparison of ethanol, ammonia, formaldehyde, methanol, and benzene. (C) Comparison curves of sensitivity and concentration [Color figure can be viewed at wileyonlinelibrary.com] | 1465 CHEN Et al.the ZnO nanoparticles are easy to gather in the SDS-PVP soft template. XRD and XPS indicate that the SDS and PVP addition will not affect the crystal structure. The experiments show that the sensitivity and selectivity of ZnO increase when m SDS :m PVP = 1:1. This research provides more potential ideas for other metal oxides as gas sensor. ORCID Chengyou Liuhttps://orcid.org/0000-0002-4363-6354

show abstract

Unique Halloysite Nanotubes–Polyvinyl Alcohol–Polyvinylpyrrolidone Composite Complemented with Physico–Chemical Characterization

Cited by 24 publications

References 51 publications

Tribological and mechanical properties of polyamide-11/halloysite nanotube nanocomposites

Tribological and mechanical properties of polyamide-11/halloysite nanotube nanocomposites

Novel cellulose acetate propionate‐halloysite composite membranes with improved permeation flux, salt rejection, and antifouling properties

Effect of PVP on gas‐sensing properties of ZnO micro/nanostructure materials in SDS‐PVP composite

Contact Info

Product

Resources

About