Micellar-cluster association of ureidopyrimidone functionalized monochelic polybutadiene

Bobade, Sachin; Malmgren, Thomas; Baskaran, Durairaj

doi:10.1039/c3py01002c

Cited by 17 publications

(15 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the FTIR spectrum of UPy-NCO showed a new absorption peak at 1585 cm −1 and a broadening of the peak at 3300 cm −1 , which confirmed the formation of UPy-NCO (Figure S3B). 42 Further, UPy-NCO was reacted with gelatin to get the UPy-functionalized gelatin (G-UPy). The grafting of UPy to gelatin was confirmed by the new peaks observed at 1735 cm −1 in the FTIR spectrum and at 5.3 ppm in the NMR spectrum, which correspond to the UPy group (Figure S3C,D).…”

Section: Synthesis and Characterization Of Polymersmentioning

confidence: 99%

Nanohybrid-Reinforced Gelatin-Ureidopyrimidinone-Based Self-healing Injectable Hydrogels for Tissue Engineering Applications

Balavigneswaran

Muthuvijayan

2021

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

The traditional hydrogels are prone to break due to the applied stress. The deformation of the implanted hydrogels would result in the loss of structural integrity, leading to the failure of hydrogel functionalities and tissue regeneration. Selfhealing hydrogels (AG-UPy), composed of oxidized alginate and ureidopyrimidinonefunctionalized gelatin (G-UPy), were developed to address this challenge. These selfhealing hydrogels possess two independent healing mechanisms, viz., Schiff base formation and UPy dimerization. These hydrogels were compared with oxidized alginate-gelatin (AG) hydrogels. AG-UPy hydrogels showed effective self-healing in a short time (about 2 min) after applying 800% strain, wherein recovery was not achieved with the AG hydrogel. However, the shear-thinning property of UPy made the AG-UPy hydrogel mechanically weaker than the AG hydrogel. To improve the mechanical strength of the AG-UPy hydrogel, we impregnated poly(ethylene glycol)poly(urethane)/cloisite nanohybrid (PEG-PU/C) to prepare the AG-UPy/PEG-PU/C hydrogel. The incorporation of PEG-PU/C resulted in a 20-fold increase in the compression strength compared to that of the AG-UPy hydrogel. The AG-UPy/PEG-PU/C hydrogels also showed rapid self-healing. Incorporating the nanohybrid improved the cell proliferation by 2-and 1.25-fold compared to that of the AG and AG-UPy hydrogels, respectively. Therefore, PEG-PU/C combined with the UPy-functionalized polymer could be used to modulate mechanical strength and self-healing and enhance cell proliferation.

show abstract

Section: Synthesis and Characterization Of Polymersmentioning

confidence: 99%

Nanohybrid-Reinforced Gelatin-Ureidopyrimidinone-Based Self-healing Injectable Hydrogels for Tissue Engineering Applications

Balavigneswaran

Muthuvijayan

2021

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

show abstract

“…S1 †), indicating the formation of high-molecular-weight (HMW) SMPs by UPy dimerization in THF solution. 37,38 This HMW shoulder in the GPC curve may also be resulted by the possible reaction of excess NCO groups with urethane groups, which can form the allophanate crosslinked or branched structure.…”

Section: Preparation Of Alternating Multiblock Smpsmentioning

confidence: 99%

Alternating poly(lactic acid)/poly(ethylene-co-butylene) supramolecular multiblock copolymers with tunable shape memory and self-healing properties

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Interestingly, UPy-NCO had a strong absorption peak at 2250 cm −1 , which corresponded to the characteristic peak of the -NCO group [19]. While the peak disappeared in the spectrum of NCC-UPy, a new absorption peak appeared at 1702 cm −1 , corresponding to the absorption peak of the carbonyl group (-C=O) in the -OOCNH-group [20,21]. Such a phenomenon indicated that UPy-NCO had a chemical reaction with -OH in nanocellulose to form a urethane bond (-OOCNH-).…”

Section: Ftir Analysismentioning

confidence: 97%

One-Pot Synthesis of UPy-Functionalized Nanocellulose under Mechanochemical Synergy for High-Performance Epoxy Nanocomposites

Wang

Huang

et al. 2022

Polymers

View full text Add to dashboard Cite

The high strength, high specific surface area, excellent biocompatibility, and degradability of nanocellulose (NCC) make it a potential reinforcing phase for composite materials. However, the polyhydroxyl property of NCC renders it prone to self-aggregation and it has weak interfacial compatibility with non-polar substrates, limiting its enhancement performance for composite materials. Therefore, based on the high reactivity of NCC, the chemical modification of NCC to introduce functional groups is the basis for effectively reducing its self-aggregation, improving its interfacial compatibility with the polymer matrix, and creating nanocellulose-based functional materials. The existing functional modifications of NCC have limitations; they require cumbersome steps, generate low yields, and are environmentally unfriendly. Herein, ureido-pyrimidinone (UPy) was introduced to NCC through a sustainable and high-efficiency avenue formed by the mechanochemical synergy of microwaves and ultrasonication. The obtained UPy-modified nanocellulose (NCC-UPy) exhibited a rod-like shape, with a length of 200–300 nm and a width of 20–30 nm, which presented oriented and stable dispersion in an aqueous medium, and the zeta potential reached −40 mV. Moreover, NCC-UPy had good thermostability (>350 °C) and high crystallinity (82.5%) within the crystal type of cellulose I. Using the as-prepared NCC-UPy as a molecular bridge, it was organically combined with epoxy resin through multiple hydrogen bonds to construct a nanocomposite membrane with superior mechanical strength and thermal stability. The results revealed that NCC-UPy dispersed uniformly in the epoxy matrix without aggregating and that the interfacial compatibility was good, leading to an 87% increase in the tensile strength of the formed nanocomposite membrane when 0.5 wt.% NCC-UPy was loaded. It was proved that NCC-UPy had remarkable reinforcing potential and effective stress transfer capacity for composites. Consequently, this study may open the door to the development of a one-pot green approach for undertaking the functional modification of NCC, and it is of great significance for the development of NCC-based nanocomposites.

show abstract

Micellar-cluster association of ureidopyrimidone functionalized monochelic polybutadiene

Cited by 17 publications

References 54 publications

Nanohybrid-Reinforced Gelatin-Ureidopyrimidinone-Based Self-healing Injectable Hydrogels for Tissue Engineering Applications

Nanohybrid-Reinforced Gelatin-Ureidopyrimidinone-Based Self-healing Injectable Hydrogels for Tissue Engineering Applications

Alternating poly(lactic acid)/poly(ethylene-co-butylene) supramolecular multiblock copolymers with tunable shape memory and self-healing properties

One-Pot Synthesis of UPy-Functionalized Nanocellulose under Mechanochemical Synergy for High-Performance Epoxy Nanocomposites

Contact Info

Product

Resources

About