Bound water restrained by nanocellulose fibres

Hatakeyama, Tatsuko; Inui, Yasuyuki; Iijima, Masaki; Hatakeyama, Hyōe

doi:10.1007/s10973-012-2823-3

Cited by 38 publications

(31 citation statements)

References 22 publications

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“…Similarly as in the case of other hydrophilic cellulosebased polymers (cellulose, chitosan, schizophyllan, hyaluronan, CMC) [14], HPC-water interactions are believed to be related to hydrogen bonding, which can lead to formation of new stable structures [15]. These entities are particularly interesting due to their ability to drastically change their mechanical and physicochemical properties.…”

Section: Introductionmentioning

confidence: 98%

“…The existing techniques that can be applied in the research of bound water include, among the others, nuclear magnetic resonance (NMR) [19,20], magnetic resonance imaging (MRI) [21], time domain reflectometry (TDR) [18] and differential scanning calorimetry (DSC) [14,15,[22][23][24][25]. However, the melting/freezing experiments using DSC seem to be the most suitable to investigate and quantify the NFW.…”

Section: Introductionmentioning

confidence: 99%

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The DSC approach to study non-freezing water contents of hydrated hydroxypropylcellulose (HPC)

Talik

Hubicka

2017

J Therm Anal Calorim

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The research consisted of investigation of non-freezable bound water (NFW) contents of raw hydroxypropylcellulose (HPC) Klucel Ò Pharm HF, MF, and LF by differential scanning calorimetry. Polymers (HF, MF and LF) used in the research differed significantly in their molecular mass and viscosity. Mixtures of HPC and low soluble salicylic acid or highly soluble sodium salicylate were used to examine the effect of counter-ions presence and drug solubility on NFW contents. The dependencies of determined enthalpies of melting (DH) and respective contents of water W c (water fraction in the dry mass of HPC or HPC mixture) DH = f(W c ) were linear. The sought values of non-freezing water were calculated (by extrapolation) as the concentration at which DH = 0. It was found that the viscosity and molecular mass of the raw HPCs did not affect the contents of non-freezing water, which ranged between 0.54 and 0.51 g g -1 for all types LF, MF, HF. Poorly soluble salicylic acid (SA) reduced the non-freezing water content to 0.19-0.17 g g -1 . On the other hand, matrices composed of highly soluble sodium salicylate (NaSA) showed variable decrease of NFW content-0.44 g g -1 for HF and 0.54-0.51 g g -1 for LF and MF. It was also found that the maximum temperature T max of melting was strongly influenced by the solubility of the drug. Highly soluble NaSA shifted T max toward the lower negative values, while SA toward the higher positive values. Assessing NFW contents in hydrated HPC matrices may contribute to a better understanding of the drug release and dissolution mechanisms of tablet formulations.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

The DSC approach to study non-freezing water contents of hydrated hydroxypropylcellulose (HPC)

Talik

Hubicka

2017

J Therm Anal Calorim

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“…It was also shown that the pigment particles affect the elastic structure of the sample. Clay-containing coatings exhibit an extended LVE as compared to pure carbonate coatings because of a stronger elasticity of the structure built up by CMC and kaolin [26,78,79]. Also, regardless of the pigment type a different thickening mechanism was observed when nanocellulose as a gel-phase system is part of the co-binder system, which has a significant effect on both static and dynamic dewatering [18,19,24].…”

Section: Coating Colours With Cmc Partially Substituted By Mnfcmentioning

confidence: 99%

“…Defining and evaluating the rheological properties of these materials, such as shear viscosity, elongational viscosity, and elasticity recovery (e.g. flow under the metering blade and the recovery stage after metering) is playing an important role in developing MNFC-containing formulations for coating processes [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…Isolating this bimodality in the data first of a mixed system of pigment, binder and polymer thickener is necessary, as thickening polymer, such as carboxymethyl cellulose (CMC), is known also to flocculate pigment and binder particles, to enable analysis of the pigment and latex binder flocculation in isolation from any later added MNFC [26,55]. The nanofibrillated MNFC material will then expose its rheological properties when dispersed by CMC as a separable function independent of the flocculation-induced bimodality.…”

Section: Introductionmentioning

confidence: 99%

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From colloidal spheres to nanofibrils: Extensional flow properties of mineral pigment and mixtures with micro and nanofibrils under progressive double layer suppression

Dimić-Mišić

Hummel

Paltakari

et al. 2015

Journal of Colloid and Interface Science

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Plant Nanomaterials and Inspiration from Nature: Water Interactions and Hierarchically Structured Hydrogels

et al. 2020

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Recent developments in the area of plant‐based hydrogels are introduced, especially those derived from wood as a widely available, multiscale, and hierarchical source of nanomaterials, as well as other cell wall elements. With water being fundamental in a hydrogel, water interactions, hydration, and swelling, all critically important in designing, processing, and achieving the desired properties of sustainable and functional hydrogels, are highlighted. A plant, by itself, is a form of a hydrogel, at least at given states of development, and for this reason phenomena such as fluid transport, diffusion, capillarity, and ionic effects are examined. These aspects are highly relevant not only to plants, especially lignified tissues, but also to the porous structures produced after removal of water (foams, sponges, cryogels, xerogels, and aerogels). Thus, a useful source of critical and comprehensive information is provided regarding the synthesis of hydrogels from plant materials (and especially wood nanostructures), and about the role of water, not only for processing but for developing hydrogel properties and uses.

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Bound water restrained by nanocellulose fibres

Cited by 38 publications

References 22 publications

The DSC approach to study non-freezing water contents of hydrated hydroxypropylcellulose (HPC)

The DSC approach to study non-freezing water contents of hydrated hydroxypropylcellulose (HPC)

From colloidal spheres to nanofibrils: Extensional flow properties of mineral pigment and mixtures with micro and nanofibrils under progressive double layer suppression

Plant Nanomaterials and Inspiration from Nature: Water Interactions and Hierarchically Structured Hydrogels

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