Porous nano-structured micro-granules from silica-milk bi-colloidal suspension: Synthesis and characterization

Biswas, Priyanka; Sen, Debasis; Mazumder, S.; Melo, Jose Savio; Basak, C.B.; Dasgupta, Kinshuk

doi:10.1016/j.colsurfb.2017.03.048

Cited by 12 publications

(4 citation statements)

References 58 publications

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“…One way to extract the structural information from the scattering data is to perform model-dependent data analysis, where one tries to fit the scattering profile with standard equilibrium structure-factor models (such as that corresponding to hard sphere or sticky hard sphere potential) and obtain the associated parameters by the χ 2 minimization approach. In this direction, earlier most of the data from the spray-dried microgranules was fitted and reported in the literature. , However, employing the sticky hard sphere and hard sphere models for such highly dense and nonequilibrium systems is not a very reliable approach since these models are based on equilibrium liquid models. We can see from Figure S3 (Supporting Information) that by using these models we cannot obtain double-headed correlation peaks as in the present case.…”

Section: Resultsmentioning

confidence: 99%

“…In this direction, earlier most of the data from the spray-dried microgranules was fitted and reported in the literature. 68,69 However, employing the sticky hard sphere and hard sphere models for such highly dense and nonequilibrium systems is not a very reliable approach since these models are based on equilibrium liquid models. We can see from Figure S3 (Supporting Information) that by using these models we cannot obtain double-headed correlation peaks as in the present case.…”

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confidence: 99%

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Evidence of Size Stratification in Colloidal Glass Microgranules Realized by Rapid Evaporative Assembly

Tiwari,

Sen,

Das

et al. 2023

Langmuir

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Evaporation is a ubiquitous phenomenon. Rapid evaporation of the continuous phase from micrometric colloidal droplets can be used to realize nanostructured microgranules, constituting the assembled nanoparticles. One of the important aspects of such nonequilibrium assembly is the nature of the packing of nanoparticles in the microgranules. The present work demonstrates the evidence of size stratification of the nanoparticles in such far-from-equilibrium configurations. Small-angle X-ray scattering, in combination with particle packing simulation, reveals the "large on top"-type stratification in such assembled microgranules, where the larger particles get concentrated at the outer shell of the granules while the smaller particles reside in the core region. It also reveals the presence of local clusters in such a rapid evaporative assembly in aerosolized colloidal droplets.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Evidence of Size Stratification in Colloidal Glass Microgranules Realized by Rapid Evaporative Assembly

Tiwari,

Sen,

Das

et al. 2023

Langmuir

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“…The transportation of the metabolites and nutrients of the cells is improved with the increased of the porosity, which is beneficial to the migration and proliferation of the cells. But as the porosity increased, the strength of the scaffold will be weakened accordingly (Biswas et al 2017;Kang et al 2017). The porosity rate of the GP group was higher than that of the other three groups.…”

Section: Discussionmentioning

confidence: 99%

Decellularized nerve extracellular matrix/chitosan crosslinked by genipin to prepare a moldable nerve repair material

Zhang

et al. 2021

Cell Tissue Bank

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Decellularized nerve extracellular matrix (NECM) composited with chitosan are moldable materials suitable for spinal cord repair. But the rapid biodegradation of the materials may interrupt neural tissue reconstruction in vivo. To improve the stability of the materials, the materials produced by NECM and chitosan hydrogels were crosslinked by genipine, glutaraldehyde or ultraviolet ray. Physicochemical property, degradation and biocompatibility of materials crosslinked by genipin, glutaraldehyde or ultraviolet ray were evaluated. The scaffold crosslinked by genipin possessed a porous structure, and the porosity ratio was 89.07 ? 4.90%, the average diameter of pore was 85.32 ? 5.34 lm. The crosslinked degree of the scaffold crosslinked by genipin and glutaraldehyde was 75.13 ± 4.87%, 71.25 ± 5.06% respectively; Uncrosslinked scaffold disintegrated when immerged in distilled water while the scaffold crosslinked by genipin and glutaraldehyde group retained their integrity. The scaffold crosslinked by genipin has better water absorption, water retention and anti-enzymatic hydrolysis ability than the other three groups. Cell cytotoxicity showed that the cytotoxicity of scaffold crosslinked by genipin was lower than that crosslinked by glutaraldehyde. The histocompatibility of scaffold crosslinked by genipin was also better than glutaraldehyde group. More cells grew well in the scaffold crosslinked by genipin when co-cultured with L929 cells. The decellularized nerve extracellular matrix/chitosan scaffold crosslinked by Fangsong Zhang, Naili Zhang, Qing Xu, and Luping Zhang have contributed to this work equally and should be considered as co-first authors.

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“…Such nano/mesoscopic voids make the granules porous [44]. Additionally, porosity can be enhanced by incorporating templates or porous nanotubes to colloidal solution during drying [45,46]. It should be mentioned that it has already been shown earlier that such spray-dried silica granules contain significant amount (10-15 wt%) of confined water [25].…”

Section: Introductionmentioning

confidence: 99%

Confinement driven anomalous freezing in nano porous spray dried microspheres

Biswas¹,

Sen²,

Prasher³

et al. 2021

Nanotechnology

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One-step evaporative jamming of colloidal silica particles in contact-free spray droplets resulted in well-defined powder micro-granules with interstitial nanopores. This paper reports the anomalous freezing behaviour of confined water in the microspheres synthesized using spray drying. It has been revealed that the freezing point of water in these microspheres gets significantly lowered (∼−45 °C) owing to the confinement effect. Thermoporometry results are corroborated with the structural details obtained using complementary techniques of gas adsorption measurements and small-angle x-ray scattering.

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Porous nano-structured micro-granules from silica-milk bi-colloidal suspension: Synthesis and characterization

Cited by 12 publications

References 58 publications

Evidence of Size Stratification in Colloidal Glass Microgranules Realized by Rapid Evaporative Assembly

Evidence of Size Stratification in Colloidal Glass Microgranules Realized by Rapid Evaporative Assembly

Decellularized nerve extracellular matrix/chitosan crosslinked by genipin to prepare a moldable nerve repair material

Confinement driven anomalous freezing in nano porous spray dried microspheres

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