Bhawal, Poushali; Ganguly, Sayan; Das, Tushar Kanti; Mondal, Subhadip; Das, N. C.
Mechanically robust conductive carbon clusters confined ethylene methyl acrylate–based flexible composites for superior shielding effectiveness
Arresting of conducting carbon black into polymeric matrix to develop flexible and light weight composite has been a widely practiced platform. Extensive development of telecommunication creates a major vexations regarding radiation pollution. Thereafter, we have been motivated to develop low-cost, flexible composites of specialty carbon black VXC (Vulcan XC 72)–filled…
Mechano-switchable, luminescent gels derived from salts of a long-chained, fatty-acid gelator
Zhang, Mohan; Weiss, Richard G.
Stimulus-responsive molecular gel systems, based on metal salts of a luminescent gelator, 9,10-dioxooctadecanoic acid (DODA), are reported. These salts are structurally the simplest metallo-gelators of which we are aware that exhibit controllable mechano-responsive and luminescent properties. Aggregation is more favored by the metal salts than for DODA itself. However, gelation…
Mechanism of Particle Formation in Silver/Epoxy Nanocomposites Obtained through a Visible-Light-Assisted in Situ Synthesis
dell’Erba, Ignacio E.; Martínez, Francisco D.; Hoppe, Cristina E.; Eliçabe, Guillermo E.; Ceolín, Marcelo; Zucchi, Ileana A.; Schroeder, Walter F.
A detailed understanding of the processes taking place during the in situ synthesis of metal/polymer nanocomposites is crucial to manipulate the shape and size of nanoparticles (NPs) with a high level of control. In this paper, we report an in-depth time-resolved analysis of the particle formation process in silver/epoxy nanocomposites…
Melt Crystallization Behavior and Spherulitic Morphology of Poly(Trimethylene Terephthalate)/Poly(Propylene Glycol) Copolymers with Different Poly(Propylene Glycol) Molecular Weights
Li, Peng; Yao, Chenguang; Yang, Guisheng
Poly(trimethylene terephthalate)/poly(propylene glycol) (PTT/PPG) copolymers with different PPG molecular weights (400–4,000 g /mol) were successfully synthesized and characterized. Double melting endotherms during isothermal melt crystallization were observed by differential scanning calorimetry. Middle-temperature melting endotherms in all copolymers were stronger than that in PTT homopolymer…
Mesochanneled Hierarchically Porous Aluminosiloxane Aerogel Microspheres as a Stable Support for pH-Responsive Controlled Drug Release
Vazhayal, Linsha; Talasila, Sindhoor; Abdul Azeez, Peer Mohamed; Solaiappan, Ananthakumar
The molecular-scale self-assembly of a 3D aluminosiloxane (Al–O–Si) hybrid gel network was successfully performed via the cocondensation of hydrolyzed alumina (AlOOH) and (3-aminopropyl)trimethoxysilane (APS). It was transformed into a microspherical aerogel framework of Al–O–Si containing mesochannels with tunable hierarchically bimodal meso/macroporosities by a subcritical drying technique.…
Mesoporous Silica Coated Polydopamine Functionalized Reduced Graphene Oxide for Synergistic Targeted Chemo-Photothermal Therapy
Shao, Leihou; Zhang, Ruirui; Lu, Jianqing; Zhao, Caiyan; Deng, Xiongwei; Wu, Yan
The integration of different therapies into a single nanoplatform has shown great promise for synergistic tumor treatment. Herein, mesoporous silica (MS) coated polydopamine functionalized reduced graphene oxide (pRGO) further modified with hyaluronic acid (HA) (pRGO@MS-HA) has been utilized as a versatile nanoplatform for synergistic targeted chemo-photothermal therapy against cancer. A…
Micellization in vegetable oils: A structural characterisation
Fadel, Ophélie; Girard, Luc; Gomes Rodrigues, Donatien; Bauduin, Pierre; Le Goff, Xavier; Rossignol-Castera, Anne; L’Hermitte, Annabelle; Diat, Olivier
The solubilisation of polar and polyphenol antioxidant in vegetable oils was studied. It was shown that the use of a polyglyceryl-3-diisostearate (PG3DS), a bio-sourced emulsifier well known in cosmetics, increases the yield of solubilisation thanks to some aggregation properties analysed using x-ray scattering technique. We show indeed that PG3DS forms…
Microstructure of Pharmaceutical Semicrystalline Dispersions: The Significance of Polymer Conformation
Van Duong, Tu; Goderis, Bart; Van Humbeeck, Jan; Van den Mooter, Guy
The microstructure of pharmaceutical semicrystalline solid dispersions has attracted extensive attention due to its complexity that might result in the diversity in physical stability, dissolution behavior, and pharmaceutical performance of the systems. Numerous factors have been reported that dictate the microstructure of semicrystalline dispersions. Nevertheless, the importance of the…
Mind the Microgap in Iridescent Cellulose Nanocrystal Films
Fernandes, Susete N.; Almeida, Pedro L.; Monge, Nuno; Aguirre, Luis E.; Reis, Dennys; Oliveira, Cristiano L. P. de; Neto, António M. F.; Pieranski, Pawel; Godinho, Maria H.
A new photonic structure is produced from cellulose nanocrystal iridescent films reflecting both right and left circularly polarized light. Micrometer-scale planar gaps perpendicular to the films' cross-section between two different left-handed films' cholesteric domains are impregnated with a nematic liquid crystal. This photonic feature is reversibly tuned by the application…
Molecular Weight Dependency of Surface Free Energy of Native and Stabilized Crystallites in Isotactic Polypropylene
Lu, Ying; Wang, Yaotao; Jiang, Zhiyong; Men, Yongfeng
Two isotactic polypropylene samples were investigated to study the influence of molecular weight on the crystallization and meting behaviors via temperature- dependent small-angle X-ray scattering techniques. In a phase diagram of inverse lamellar thickness and temperature, the crystallization and melting behaviors can be described by two linear dependencies of different…