Nanoarchitectonics at surfaces using multifunctional initiators of surface-initiated radical polymerization for fabrication of the nanocomposites

Donchak, Volodymyr; Stetsyshyn, Yurij; Bratychak, Michael; Broza, G.; Harhay, Khrystyna; Stepina, Nataliia; Kostenko, Mariia; Voronov, Stanislav

doi:10.1016/j.apsadv.2021.100104

Cited by 28 publications

(23 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such unique structure and cylindrical shape provide high strength of nanoparticles, which is hundreds of times higher than the strength of steel [ 6 ]. The introduction of CNTs into the macromolecular matrix strongly affects the nanocomposites’ structure and mechanical properties, generally, increasing the tensile strength [ 7 , 8 , 9 ]. The materials’ strength is particularly important in biomedical applications such as vascular replacements, patches, chordal, and heart valve materials [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Biomaterials Based on Carbon Nanotube Nanocomposites of Poly(styrene-b-isobutylene-b-styrene): The Effect of Nanotube Content on the Mechanical Properties, Biocompatibility and Hemocompatibility

et al. 2022

View full text Add to dashboard Cite

Nanocomposites based on poly(styrene-block-isobutylene-block-styrene) (SIBS) and single-walled carbon nanotubes (CNTs) were prepared and characterized in terms of tensile strength as well as bio- and hemocompatibility. It was shown that modification of CNTs using dodecylamine (DDA), featured by a long non-polar alkane chain, provided much better dispersion of nanotubes in SIBS as compared to unmodified CNTs. As a result of such modification, the tensile strength of the nanocomposite based on SIBS with low molecular weight (Mn = 40,000 g mol–1) containing 4% of functionalized CNTs was increased up to 5.51 ± 0.50 MPa in comparison with composites with unmodified CNTs (3.81 ± 0.11 MPa). However, the addition of CNTs had no significant effect on SIBS with high molecular weight (Mn~70,000 g mol−1) with ultimate tensile stress of pure polymer of 11.62 MPa and 14.45 MPa in case of its modification with 1 wt% of CNT-DDA. Enhanced biocompatibility of nanocomposites as compared to neat SIBS has been demonstrated in experiment with EA.hy 926 cells. However, the platelet aggregation observed at high CNT concentrations can cause thrombosis. Therefore, SIBS with higher molecular weight (Mn~70,000 g mol−1) reinforced by 1–2 wt% of CNTs is the most promising material for the development of cardiovascular implants such as heart valve prostheses.

show abstract

Section: Introductionmentioning

confidence: 99%

Biomaterials Based on Carbon Nanotube Nanocomposites of Poly(styrene-b-isobutylene-b-styrene): The Effect of Nanotube Content on the Mechanical Properties, Biocompatibility and Hemocompatibility

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This large value of hydrogel (GGAACNT3) indicates that the ‐o‐ MWCNT is well dispersed in the gel, which shows better crosslinking providing the maximum strength to hydrogel sample 78 . On further addition of ‐o‐ MWCNT (40–50 mg) for the said strain values there was not much improvement in the stress as the hydrogels (GGAACNT4 and GGAACNT5) observed a minimum value of strain as compared to pure hydrogel 79–81 …”

Section: Resultsmentioning

confidence: 96%

“…78 On further addition of -o-MWCNT (40-50 mg) for the said strain values there was not much improvement in the stress as the hydrogels (GGAACNT4 and GGAACNT5) observed a minimum value of strain as compared to pure hydrogel. [79][80][81]…”

Section: Linear Viscoelastic Region Investigationmentioning

confidence: 99%

Oxidized multiwalled carbon nanotube reinforced rheological examination on Gum ghatti‐cl‐poly(acrylic acid) hydrogels

Kamaliya

Dave

Macwan³

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

The intention of the present study was to synthesize Gum ghatti-cl-poly(acrylic acid)/-o-MWCNT hydrogel by free radical copolymerization method where the role of various ingredients are as: Gum ghatti as biopolymer (GG), acrylic acid (AA) as a probe for synthetic monomer, ammonium persulfate as initiator and methylene bis-acrylamide (MBA) as a crosslinker. The oxidized multiwalled nanocarbon tubes (-o-MWCNT) with variable amounts (0-50 mg) were used as fillers. The as-prepared hydrogels were characterized by X-ray diffraction, scanning electron microscope and Fourier transform infrared spectroscopy.The rheological investigation of hydrogels revealed that the storage modulus (G 0 ) was always higher than the loss modulus (G 00 ) in the linear viscoelastic region over the entire frequency range. The persistent covalence crosslinking is responsible for the solid-like behavior and elastic nature (G 0 > G 00 ). Hydrogels containing Gum ghatti-cl-poly(acrylic acid)/-o-MWCNT increased with strain. The nonlinear oscillatory shear increases by the addition -o-MWCNT.The features shown highlight the potential of Gum ghatti-cl-poly(acrylic acid)/-o-MWCNT hydrogels for agricultural, medicinal, and pharmaceutical applications.

show abstract

“…One idea to harness such a random reaction is to initiate the polymerization reaction from the CNT's surface. 32,33 This allows polymeric aggregates to form near the CNT surface and preferentially coat the tubes. 33 To the best of our knowledge, few studies have been performed on polymer-coated/wrapped CNTs synthesized via controllable surface-initiated polymerization reactions.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of polystyrene‐coated carbon nanotubes via microwave‐assisted in‐situ polymerization and tuning of the DC electrical conductivity and impedance characteristics

2023

View full text Add to dashboard Cite

An attempt has been made to tune the DC electrical conductivity and impedance characteristics of the nanocomposites by coating carbon nanotubes (CNTs). A microwave‐assisted in‐situ polymerization approach is utilized to coat the CNTs with polystyrene and no initiators are used. The nanocomposites are characterized by FE‐SEM, TEM, FT‐IR, Raman and TGA. Based on the morphological studies, a polystyrene layer is detected on the CNTs. According to the TGA results, the weight loss in the temperature range of polystyrene decomposition increases with increasing microwave irradiation time, suggesting a higher polystyrene content. Moreover, the DC electrical conductivity of the nanocomposites, as well as the real and imaginary impedance and dielectric permittivity are explored. It is shown that increasing the irradiation time decreases the DC electrical conductivity and dielectric permittivity but increases the real and imaginary impedance. Since the thickness of the polystyrene layer depends on the duration of microwave irradiation, our method can be used to tune the electrical conductivity and impedance characteristics. This can be applied to practical situations where a particular resistance is required.

show abstract

Nanoarchitectonics at surfaces using multifunctional initiators of surface-initiated radical polymerization for fabrication of the nanocomposites

Cited by 28 publications

References 63 publications

Biomaterials Based on Carbon Nanotube Nanocomposites of Poly(styrene-b-isobutylene-b-styrene): The Effect of Nanotube Content on the Mechanical Properties, Biocompatibility and Hemocompatibility

Biomaterials Based on Carbon Nanotube Nanocomposites of Poly(styrene-b-isobutylene-b-styrene): The Effect of Nanotube Content on the Mechanical Properties, Biocompatibility and Hemocompatibility

Oxidized multiwalled carbon nanotube reinforced rheological examination on Gum ghatti‐cl‐poly(acrylic acid) hydrogels

Facile synthesis of polystyrene‐coated carbon nanotubes via microwave‐assisted in‐situ polymerization and tuning of the DC electrical conductivity and impedance characteristics

Contact Info

Product

Resources

About