Polyion Complex Fiber and Capsule Formed by Self-Assembly of Chitosan and Poly(α,L-glutamic acid) at Solution Interfaces

Ohkawa, Kousaku; Takahashi, Yae; Yamada, Masanori; Yamamoto, Hiroyuki

doi:10.1002/1439-2054(20010301)286:3<168::aid-mame168>3.0.co;2-7

Cited by 41 publications

(24 citation statements)

References 21 publications

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“…This leads us to suggest, in accordance with most previous works, that at the interface of the two components forms a load-bearing strong skin that prevents diffusion of the polycation deep into the filament, resulting in a core-shell strucutre. 42,48,[57][58][59][60] The majority solid component was interpreted to be TOCN based on the color of the wet filament (see Figure 1c) when using dyed TOCN dispersion (blue) and polycation solution (pink, PDADMAC).…”

Section: Resultsmentioning

confidence: 99%

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Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

et al. 2017

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ABSTRACT. Fiber spinning of anionic TEMPO-oxidized cellulose (TOCN) nanofibrils with polycations by interfacial polyelectrolyte complexation is demonstrated. The formed fibers were mostly composed of cellulose nanofibrils and the polycations were a minor constituent, leading to yield and ultimate strengths of ca. 100 MPa and ca. 200 MPa, and Young's modulus of ca. 15 GPa.Stretching of the as-formed wet filaments of TOCN/polycation by 20 % increased the Young's modulus, yield strength, and ultimate tensile strength by approximately 45, 36 and 26 %, respectively. Importantly, feasibility of compartmentalized wound bicomponent fibers by simultaneous spinning of two fibers of different compositions and entwining them together was shown. This possibility was further exploited to demonstrate reversible shape change of a bicomponent fiber directly by humidity change, and indirectly by temperature changes based on thermally dependent humidity absorption.The demonstrated route for TOCN-based fiber preparation is expected to open up new avenues in the application of nanocelluloses in advanced fibrous materials, crimping, and responsive smart textiles.

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Section: Resultsmentioning

confidence: 99%

“…[44][45][46][47] As an additional benefit, large scale high throughput IPC spinning has been demonstrated to be feasible. [48][49][50] While IPC spinning of colloidal materials such as carbon nanotubes and protein amyloids into strong fibers has been shown, [49][50][51] IPC spinning of CNF-based fibers remains yet to be demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

et al. 2017

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“…The properties of the PIC materials have been reported in our earlier articles. [23,[26][27][28][29] In the case of chitosan-gellan capsules, the preliminary results have also been reported as illustratively drawn in Figure 1.…”

Section: Resultsmentioning

confidence: 99%

“…[23] The chitosan-gellan capsule has potential to versatile and practiced applications for closely native or physiological condition. Later, we reported the preparative methods and partial characterization of composite capsules using other biological polymers, such as poly(L-lysine)-gellan, [26] poly(L-glutamic acid)-chitosan, [27,28] poly-(L-lysine)-poly(L-glutamic acid) [29] (reviewed in ref. [30,31] ).…”

Section: Full Papermentioning

confidence: 99%

Preparation and Characterization of Chitosan‐Gellan Hybrid Capsules Formed by Self‐Assembly at an Aqueous Solution Interface

Ohkawa

Kitagawa

Yamamoto

2004

Macro Materials & Eng

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Summary: True spherical capsules are formed by electrostatic polysaccharide interaction between chitosan and gellan gum via polyion complex (PIC) formation in aqueous solutions. Dropwise addition of a chitosan solution into the gellan solution gave spherical capsules whose outside surface was gellan and whose inside was chitosan (chitosanin‐gellanout capsule). Conversely, the addition of gellan into chitosan yields chitosanout‐gellanin capsules. SEM observation revealed a fibrous network spreading along the capsule membrane of the chitosanin‐gellanout capsule. The releasing properties of the capsules were examined using low molecular weight substances and high molecular weight proteins. For low molecular weight substances, the releasing kinetics were affected by the attractive and repulsive interactions between the substances and the inside component of the capsule. The molecular weight of the encapsulated substances also affects the releasing kinetics. These results, together with a simple preparation procedure, indicate the applicability of chitosan‐gellan capsules as drug‐carrier materials having a controlling release mechanism. As an application example, preparation of an actually eatable artificial roe was also described.Illustrative drawing of PIC capsule formation.magnified imageIllustrative drawing of PIC capsule formation.

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“…The three PIC fibers thus created were the chitosan-gellan fiber, [4] the poly(a,l-lysine) (PLL)-gellan fiber [5] and the poly(a,l-glutamic acid) (PLG)-chitosan fiber. [6] The characteristic features of the three PIC fibers are i) a simple operation for spinning, ii) low-cost media (water, acetic acid and methanol), iii) enhanced tensile and knot strengths by cross-linking agents, iv) dyeing with many colors, and v) good biodegradability. [7] Nowadays, the widespread use of chemical compounds around the world has led to the serious problem of environmental pollution.…”

Section: Introductionmentioning

confidence: 88%

Adsorption of Endocrine Disruptors and Related Compounds Using Natural Polymer Composite Fibers Formed by Polyion Complexes

Takahashi

Ohkawa

Andô

et al. 2001

Macromol. Mater. Eng.

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Polyion Complex Fiber and Capsule Formed by Self-Assembly of Chitosan and Poly(α,L-glutamic acid) at Solution Interfaces

Cited by 41 publications

References 21 publications

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

Interfacial Polyelectrolyte Complex Spinning of Cellulose Nanofibrils for Advanced Bicomponent Fibers

Preparation and Characterization of Chitosan‐Gellan Hybrid Capsules Formed by Self‐Assembly at an Aqueous Solution Interface

Adsorption of Endocrine Disruptors and Related Compounds Using Natural Polymer Composite Fibers Formed by Polyion Complexes

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