Thermogelling polysaccharides for aqueous gelcasting—part I: a comparative study of gelling additives

Millán, Arnaldo; Moreno, Rodrigo; Nieto, Ma I.

doi:10.1016/s0955-2219(01)00532-5

Cited by 71 publications

(60 citation statements)

References 17 publications

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“…In Figure 6(a), typical viscosity curve performed on heating and further cooling of an agar solution is presented, showing the hysteresis cycle and the characteristic temperatures. [51] When comparing the different polysaccharides the highest hysteresis value is observed for agar (40-60°C depending on the seawood type), and it is lower for k-carrageenan (10-27°C), and much lower for i-carrageenan (2-5°C), which has the highest content of ester-sulphate. Table 3 shows the experimental values obtained by Mill an et al [51] for carrageenan, agar, and agarose solutions at different concentrations.…”

Section: Polysaccharides That Gel On Coolingmentioning

confidence: 95%

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

2014

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The application of the gelling properties of some polysaccharides in the consolidation of ceramics (gel casting) allows the forming of dense complex-shape samples through colloidal routes. A description of those polysaccharides, their gelling mechanisms (chemical and thermal), and their synergistic interaction with non gelling polysaccharides is revised, as well as their application in the shaping of 3D (bulk) and 2D (substrates, coatings, and laminates) ceramics. The materials obtained by this methodology show both homogeneous microstructures and high green mechanical strengths, which make possible the machining in the green state, with the corresponding costs reduction.

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Section: Polysaccharides That Gel On Coolingmentioning

confidence: 95%

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

2014

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“…These compounds can interact in solution to form gels by different mechanisms, such as interpenetration of flexible coils, the weak association of rigid rod-like structures or the formation of inter-chain tertiary structures. 44) The most studied polysaccharides for gelcasting are carrageenan, 21), 22) agar, agarose 45) and chitosan. 46) Gelation processes with polysaccharides normally include a step of heating up the suspension to dissolve the monomers, then the suspension is poured into the mold where it would gel upon cooling.…”

Section: Polysaccharides and Proteinsmentioning

confidence: 99%

Recent trends in shape forming from colloidal processing: A review

Tallón

Franks

2011

J. Ceram. Soc. Japan

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Shaping ceramic materials is a research area which has continuing innovation and excellence. Dry processing routes gave way to colloidal techniques enabling the preparation of more complex shapes for a wide and growing field of applications. Both dense and porous ceramics with improved properties can be produced. The development of colloidal processing led to the creation of the near-net-shaping concept, performed through slip casting, gelcasting and freeze casting. Even though these concepts have been used for the last few decades, different trends and combinations of these techniques are refreshing the processing strategies in recent years. New chemistries and concepts continue to emerge. This paper creates an overview of the recent trends in near-net-shaping routes, having a deeper look into gelcasting and freeze casting, since both processes are used in the preparation of tailored and custom dense and porous ceramics.

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“…The gelling properties of κ -carrageenan are higher than the other types, whereas its viscosity is lower [6]. Gel efficiency could be increased in the presence of K + ions at neutral or basic pH [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Transport of Indomethacin from Kappa-Carrageenan based Nanogel

Singh¹,

Thakur²,

Avadhani³

2016

J Bioengineer & Biomedical Sci

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An effort has been made to prepare gel matrices using different concentrations of Carrageenan whose particle sizes could be exploited in the nanoscale. The Single emulsion technique has been employed for gel formulation. After formulation, gels were characterized for their particle size and zeta potential. Fourier Transform Infrared Spectroscopy (FTIR) was used in the analysis of nanogels, scanning electron microscopy (SEM) to envision the surface microstructures was also performed. It was found that average particle size was in the range of 2000-4000 nm after drug entrapment and the particles were found to be spherical in shape. The entrapment efficiency of the model drug (Indomethacin) in gel matrix was found to be nearly 40%. Finally, the in vitro release profiles of indomethacin from the nanogel matrices were evaluated spectrophotometrically at 266 nm. Drug release from nanogel consisting of 4% carrageenan was found to be 68% for up to 24 h. Finally, the results have indicated that the Carrageenan nanogel carriers could be used for drug delivery applications.

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Thermogelling polysaccharides for aqueous gelcasting—part I: a comparative study of gelling additives

Cited by 71 publications

References 17 publications

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

Shaping of Dense Advanced Ceramics and Coatings by Gelation of Polysaccharides

Recent trends in shape forming from colloidal processing: A review

Transport of Indomethacin from Kappa-Carrageenan based Nanogel

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