Immobilization of Polymers to Surfaces by Click Reaction for Photocatalysis with Recyclability

Ramar, Periyamuthu; Raghavendra, Venkatraman; Murugan, P.; Samanta, Debasis

doi:10.1021/acs.langmuir.2c00809

Cited by 5 publications

(2 citation statements)

References 51 publications

(117 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high cost and sensitivity of the reaction often limit its application on a larger scale. On the other hand, since click reaction is one of the most versatile and facile reactions, − as evident from recent (2022) Noble Prize in chemistry, herein we used the click chemistry approach to incorporate various distinct functionalities to silica nanoparticles with tunable hydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

Improving Hydrophobicity of Collagen with Silica Nanoparticles: Probing a Noncovalent Approach

Stephen,

Gayathri,

Lobo

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

Collagen-based materials have a wide range of applications in wound care, tendon repair, cartilage repair, etc. Improving certain properties such as hydrophobicity can diversify the application areas. In this work, we investigated the noncovalent interactions of suitably functionalized silica nanoparticles with collagen for the possibility of improving hydrophobicity. Functionalization on silica nanoparticles was achieved via Cu(I)catalyzed azide−alkyne cycloaddition (CuAAC) or "click" reaction using surface grafting methods. Furthermore, we synthesized two different silica nanoparticles (SiNPs) functionalized with the fluorine-containing substrate or only with an aryl moiety (silicag-4EMB and silica-g-ETFMB) for comparison. The functionalized SiNPs immobilized along with the model system trans-4-hydroxy-L-proline (HPA) (usually present in abundant quantities in collagen) have been probed using nuclear magnetic resonance (NMR) spin relaxation to appreciate the influence of SiNPs on HPA. Furthermore, we effectively utilized a saturated transfer difference (STD) NMR experiment to measure the interaction parameters between judiciously functionalized silica nanoparticles and substrates of interest. In essence, such a detailed study on noncovalent interactions employing an arsenal of experimental approaches facilitated the immobilization of suitably functionalized silica nanoparticles to collagen and leather (where collagen is a major constituent), leading to improvements in hydrophobicity.

show abstract

Section: Introductionmentioning

confidence: 99%

Improving Hydrophobicity of Collagen with Silica Nanoparticles: Probing a Noncovalent Approach

Stephen,

Gayathri,

Lobo

et al. 2023

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…AABB-type click polymerization was also used by Shi and others to prepare linear polymers with NLO properties . Recently AABB-type click polymerization was used by our group to immobilize polymers on different surface. − AABB-type polymerization involves near equimolar mixing of two different monomers for higher molecular weight, and efficacy often depends on dilution or other factors. A relatively less explored and more straightforward technique involves AB-type click polymerization where a single monomer contains both alkyne and azide where dilution and concentration ratio factors are not significant.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Nitrocellulose Film by AB-Type Click Polymerization: Methods and Property Enhancements

Ramar

Samanta

2022

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

Nitrocellulose (NC), predominantly used in propellants and purifying membranes, has further gained attention recently because of its application potential in flexible solar cells, molecular electronic devices, biochemical processes, and leather coatings. For the diversification of application areas of nitrocellulose-based materials, some of the inherent properties like flexibility, transparency, hydrophobicity, stability, heat of denitration, etc., require improvements. As presented in this paper, most of those properties were found to be substantially enhanced after the functionalization of nitrocellulose surfaces by a unique AB-type click polymerization, attributed to changes in chemical functionality, crystallinity, morphology, etc., as observed from X-ray diffraction (XRD), field-emission scanning electron microscopy, atomic force microscopy (AFM), and small-angle X-ray scattering (SAXS) analyses. Unlike conventional AABB-type click polymerization, herein, both azide and alkyne functional groups have been incorporated in the same monomer for better efficacy, where AB-type click polymerization took place in the presence of azide-functionalized nitrocellulose. This is a typical graft-through approach, where polymerization took place both in solution as well as on surfaces, providing flexibility of characterization in both states for the clear-cut evidence of the success of this typical polymerization as well as immobilization, as studied by solution-state as well as solid-state nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The material was used as a hydrophobic/superhydrophobic coating for leather surfaces.

show abstract

Transparent Superhydrophobic Coatings of Silica Nanoparticles Using Functionalized Polyurethanes

Sheyara

Ramar

Satheeshkumar

et al. 2023

Chemistry An Asian Journal

Self Cite

View full text Add to dashboard Cite

Superhydrophobic coatings are essential to prepare water-repellent surfaces, self-cleaning materials, etc. Silica nano-materials are often immobilized to different surfaces for imparting super-hydrophobicity. Direct coating of silica-nanoparticles is often challenging since it can easily be peeled off under different environments. Herein, we reported the use of properly functionalized polyurethanes to facilitate the strong binding of silica-nanoparticles to surfaces. The alkyne terminal polyurethane was synthesized by step-growth polymerization while click-reactions facilitated to post-functionalization using phenyl moiety and were characterized by 1 H, 13 C nuclear magnetic resonance (NMR) spectroscopies, and 1 H spin-lattice relaxation times (T 1 s). Upon functionalization, the glass transition temperature (Tg) increased due to enhanced interchain interactions. Moreover, additives like di-(propyleneglycol)dibenzoate showed a substantial plasticizing effect to compensate for the increase in Tg, an important parameter for low-temperature applications. NMR signatures the spatial interactions between various protons of grafted silica-nanoparticles and phenyl triazole functionalized polyurethanes, thus indicating the usefulness of polyurethanes to bind silica-nanoparticles. After coating functionalized silicananoparticles to leather using functionalized polyurethanes, a contact angle value of more than 157°was observed with retention of grain patterns of leather due to transparency. We anticipate the results to help design varieties of materials with superhydrophobicity where the structural integrity of the surfaces is retained.

show abstract

Immobilization of Polymers to Surfaces by Click Reaction for Photocatalysis with Recyclability

Cited by 5 publications

References 51 publications

Improving Hydrophobicity of Collagen with Silica Nanoparticles: Probing a Noncovalent Approach

Improving Hydrophobicity of Collagen with Silica Nanoparticles: Probing a Noncovalent Approach

Functionalization of Nitrocellulose Film by AB-Type Click Polymerization: Methods and Property Enhancements

Transparent Superhydrophobic Coatings of Silica Nanoparticles Using Functionalized Polyurethanes

Contact Info

Product

Resources

About