NIPPON GOMU KYOKAISHI
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Volume 88, Issue 11
Displaying 1-7 of 7 articles from this issue
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Special Issue for General Reviews “Dispersion Techniques for Nano-fibers”
Introductory Remarks
General Reviews
  • [title in Japanese]
    [in Japanese], [in Japanese]
    2015 Volume 88 Issue 11 Pages 432
    Published: 2015
    Released on J-STAGE: February 17, 2016
    DOIhttps://doi.org/10.2324/gomu.88.432
    JOURNAL FREE ACCESS
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  • Wet Atomizing Technology of Carbon Nanotube and Cellulose Nanofiber
    Kota OGURA
    2015 Volume 88 Issue 11 Pages 433-437
    Published: 2015
    Released on J-STAGE: February 17, 2016
    DOIhttps://doi.org/10.2324/gomu.88.433
    JOURNAL FREE ACCESS
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    The water jet is a method widely used for the washing and deburring, cutting, milling of various parts. Star Burst System (SBS) developed by Sugino Machine Limited is atomization machine that uses a water jet. SBS is capable to pressurize slurry containing raw material up to 245 MPa. Slurries are ejected from two opposed nozzles and collide in the chamber. Raw material in the slurry is atomized and becomes very small.
    In this paper, the results of wet jet treatment by SBS for carbon nanotube and cellulose are introduced. Carbon nanotube treated by water jet was homogeneously dispersed in water, and median size was about 2 orders of magnitude smaller than untreated sample. Cellulose treated alike was gel-like form, and became nanofiber having diameters ranging from 20 to 50 nm.
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  • Materials Design of Conductive Pressure-sensitive Adhesives with Carbon Nanotubes
    Toshio SUGIZAKI, Syo OHTAKA
    2015 Volume 88 Issue 11 Pages 438-442
    Published: 2015
    Released on J-STAGE: February 17, 2016
    DOIhttps://doi.org/10.2324/gomu.88.438
    JOURNAL FREE ACCESS
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    Pressure-sensitive adhesives (PSAs) are known as a type of adhesives that typically has properties of e.g. ease to attach/peel off and stable adhesion, which is utilized in labels, tapes etc. Some of the important characteristics of PSAs are their low glass transition temperature (Tg) , and modulus on the order of 104—107 Pa at room temperature.
    Carbon nanotubes (CNTs) are conductive materials that can realize high electrical conductivity with low concentration in hybrids. Recently, CNT-polymer nanocomposites attracts great attentions because of their ability to form conducting networks, which is attributed to their high aspect ratios.
    Here, urethane- or acrylate-based PSA or acrylic emulsion PSA composites incorporating with multi-walled CNTs (MWCNTs) or single-walled CNTs (SWCNTs) are reported where the hybridization was achieved by simply mixing and casting of the mixed solutions. The relationship between dispersion states of MWCNT in the polymer matrix, conductivity of the composites, and the surface free energies are also investigated. Finally large contribution of the surface free energies of the polymers both on the MWCNT dispersion states and the conductivity of the composite, the particle size of the emulsions on the conductivity of the composite in where SWCNTs are well-dispersed.
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  • Interface Control of Wood-Derived Nanocelluloses by Using Novel Polymer Dispersant toward High Performance Resin Nanocomposite Materials
    Keita SAKAKIBARA, Yoshinobu TSUJII, Tetsuya HARADA
    2015 Volume 88 Issue 11 Pages 443-446
    Published: 2015
    Released on J-STAGE: February 17, 2016
    DOIhttps://doi.org/10.2324/gomu.88.443
    JOURNAL FREE ACCESS
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    For mechanically strong and lightweight materials, nanocelluloses (NCs) have a range of promising properties leading to fiber-reinforced thermoplastic nanocomposites. Herein, we propose a practical approach for the preparation of cellulose nanofiber-reinforced high-density polyethylene (HDPE) nanocomposite materials with the assist of polymer dispersants via the Simultaneous nano-Fibrillation Compounding (SFC) Process.
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  • Dispersion and Functionalization of Boron Nitride Nanotubes in Aqueous Solution
    Toshiki SAWADA, Yoshio BANDO, Dmitri GOLBERG, Takeshi SERIZAWA
    2015 Volume 88 Issue 11 Pages 447-453
    Published: 2015
    Released on J-STAGE: February 17, 2016
    DOIhttps://doi.org/10.2324/gomu.88.447
    JOURNAL FREE ACCESS
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    One-dimensional inorganic nanomaterials such as carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs) are of intense scientific and technological interest due to their excellent physiochemical properties and potential applications. Because of strong van der Waals interactions and hydrophobic effects between sidewalls of the nanotubes, pristine nanotubes generally form bundled structures. This makes inorganic nanotubes difficult to incorporate into materials where individual nanotubes are required without damaging their properties. Inspired by recent successful isolation followed by functionalization of CNTs through various methods, dispersion of BNNTs towards applications has been developed via covalent and noncovalent approaches. Especially, wrapping of BNNTs by water-soluble synthetic polymers and biomolecules through weak interactions resulted in well dispersed BNNTs in aqueous solution without any changes in original physicochemical properties for biomedical applications. The nanohybrids composed of BNNTs and the polymers/biomolecules will open attractive opportunities for nanoscience and nanotechnology for next-generation hybrid materials.
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Technical Note
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