Kaneka Americas Holding Inc.

College Station, TX, United States

Kaneka Americas Holding Inc.

College Station, TX, United States
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A composition including a medium and surfactant-free nanoparticles (SFNPs) at different dispersion state or aggregation form. The composition includes: (a) a composition of a medium and surfactant-free nanoparticles in primary form, wherein the dielectric constant value (DE value) of the medium is equal to or larger than the intrinsic dielectric constant value (IDE) of the SFNPs and smaller than about 1.5 times of the IDE of the SFNPs; (b) a composition of a medium and reaction-limited aggregation form of SFNPs, wherein the DE value of the medium is much larger than the IDE of the surfactant-free nanoparticles; (c) a composition of a medium and diffusion-limited aggregation form of SFNPs, wherein the DE value of the medium is smaller than the IDE of the surfactant-free nanoparticles; and (d) a composition comprising redispersible aggregation form of surfactant-free nanoparticles, wherein the surfactant-free nanoparticles are induced to aggregate in the diffusion-limited fashion in a medium with a DE value that is smaller than the IDE of the surfactant-free nanoparticles.


Maeda K.,Kyoto Institute of Technology | Ohsara C.,Shinshu University | Yamada K.,Osaka Municipal Technical Research Institute | Fujiwara M.,Japan Polypropylene Corporation | And 4 more authors.
Annual Technical Conference - ANTEC, Conference Proceedings | Year: 2016

In this research, rubber with two different molecular weights was added to thin-wall injection molded polypropylene (PP). The effect of rubber addition on structure and property distribution of these thin-wall injection molded polypropylene (PP) samples was investigated using Polarized Optical Microscopy (POM), Differential Scanning Calorimetry (DSC), Wide Angle X-ray Diffraction (WAXD), a high speed tensile test, and a micro-cutting method. The thin-wall injection molded PP with high molecular weight with rubber exhibited the higher crystalline orientation and β-crystalline fraction as compared to other samples. Micro cutting method results revealed that the addition of rubber to PP samples led to lower shear strength. The relationship between structure and property distribution of thin-wall injection molded PP is discussed on the basis of these results.


Mantaranon N.,Chulalongkorn University | Kotaki M.,Kaneka Americas Holding Inc. | Kotaki M.,Kyoto Institute of Technology | Lim C.T.,National University of Singapore | Chirachanchai S.,Chulalongkorn University
RSC Advances | Year: 2016

Polyoxymethylene (POM) is an engineering plastic which tends to release formaldehyde under a melt-mixing process. The present work proposes a simple way to control the formaldehyde generation by a reactive blending with bisphenol-A and amine to form in situ benzoxazines via the Mannich reaction. Further thermal treatment leads to partial conversion of benzoxazines (BA-a) to polybenzoxazines (poly(BA-a)) and the POM-poly(BA-a) obtained is under a semi-interpenetrating network. At that time, the BA-a and poly(BA-a) reached the amorphous phase to induce an increase in elongation at break. When POM blends were electrospun, the molecular orientation of POM was induced and this synergistically functions with the poly(BA-a) network, resulting in an increase in tensile strength which never occurs in the bulk material. The present work shows, for the first time, not only reactive blending as a way to control the formaldehyde generation of POM but also an in situ semi-interpenetrating network as an approach to fine tune the properties of POM. © 2016 The Royal Society of Chemistry.


PubMed | Jilin University, Kaneka Americas Holding Inc. and CAS Institute of Chemistry
Type: Journal Article | Journal: Angewandte Chemie (International ed. in English) | Year: 2016

The design and preparation of metal-free organic materials that exhibit room-temperature phosphorescence (RTP) is a very attractive topic owing to potential applications in organic optoelectronic devices. Herein, we present a facile approach to efficient and long-lived organic RTP involving the doping of N-phenylnaphthalen-2-amine (PNA) or its derivatives into a crystalline 4,4-dibromobiphenyl (DBBP) matrix. The resulting materials showed strong and persistent RTP emission with a quantum efficiency of approximately 20% and a lifetime of a few to more than 100 milliseconds. Bright white dual emission containing blue fluorescence and yellowish-green RTP from the PNA-doped DBBP crystals was also confirmed by Commission Internationale de lEclairage (CIE) coordinates of (x=0.29-0.31, y=0.38-0.41).


Li P.,Texas A&M University | Huang T.-C.,Texas A&M University | White K.L.,Texas A&M University | Hawkins S.,Texas A&M University | And 3 more authors.
RSC Advances | Year: 2015

Epoxy nanocomposite spray-coatings containing large aspect ratio modified graphene (MG) were successfully prepared in a facile manner. The individually exfoliated MG nanosheets form liquid crystalline mesophases in the epoxy precursor at low loadings. The epoxy/MG nanocomposite films exhibit significantly improved gas barrier properties even in humid conditions. The spray-coating method allows for the preparation of high MG content nanocomposites in large scale without compromising processability. Implication of the present finding for fabrication of high-performance graphene-based packaging films with multi-functionality is discussed. © 2015 The Royal Society of Chemistry.


Li P.,Texas A&M University | Wong M.,Texas A&M University | Zhang X.,Kaneka Americas Holding Inc. | Yao H.,Texas A&M University | And 5 more authors.
ACS Photonics | Year: 2014

A direct colloidal self-assembly approach was utilized to prepare photonic crystals based on exfoliated graphene oxide (GO) in aqueous solution. The GO sheets form ordered photonic structure spontaneously without the need for multiple processing steps. The wavelength of light reflected by the GO photonic crystal dispersion can be controlled over the entire visible light spectrum simply by varying the GO concentration. The aspect ratio of the GO sheets and mediation of the intersheet forces are found to be the key factors influencing the stability of photonic crystal formation. The usefulness and limitations of the GO photonic crystals prepared in this study are discussed. (Graph Presented). © 2013 American Chemical Society.


Li P.,Texas A&M University | Yao H.,Texas A&M University | Wong M.,Texas A&M University | Sugiyama H.,Kaneka Corporation | And 2 more authors.
Journal of Materials Science | Year: 2014

Thermally stable and highly conductive films have been prepared based on thermally reduced graphene oxide and exfoliated α-zirconium phosphate nanoplatelet (ZrP) hybrids. Exfoliated ZrP and graphene oxide (GO) were first mixed in aqueous solution to form a stable dispersion and then cast into free-standing films through flow-directed assembly. Upon annealing at 750 °C in Argon atmosphere, significant amounts of oxidized species were removed from the GO and a noticeable recovery of sp2 structure of the reduced GO sheets was observed. With the incorporation of the inorganic nanoplatelets, the thermal stability and structural integrity of the hybrid films were greatly improved, while the good electrical conductivity of the reduced GO was maintained. Potential applications for graphene-based hybrid films based on the current approach are discussed. © 2013 Springer Science+Business Media New York.


Itoh H.,Kyoto Institute of Technology | Li Y.,Kyoto Institute of Technology | Chan K.H.K.,Kyoto Institute of Technology | Kotaki M.,Kaneka Americas Holding Inc. | Kotaki M.,Kyoto Institute of Technology
Polymer Bulletin | Year: 2016

Electrospinning has been recognized as a simple and straightforward technique for the production of nanometer and micron-scaled polymer fibers. The technique utilizes electrical forces to stretch and thin fine polymer solution jet drawn from the orifice of a nozzle. Due to the electrical nature of the spinning process, the electrical and ionic conductivity of the polymer solution was proposed to play an important influence on both the process and fiber morphology. This study aims to increase mechanical properties and control nanofiber morphology using a mass production electrospinning technique known as free surface electrospinning. It is found that development of ribbon-shaped fibers was due to thick polymer jets ejected from Taylor cones on the electrode of free surface electrospinning and fast solvent evaporation rate caused by high solution conductivity. Tensile testing of the nanofiber mats indicated higher tensile strength for nanofiber mat spun with solution of enhanced solvent conductivity. Correlating with internal structure characterized in terms of thermally properties and d-spacing, the increased mechanical properties of nanofibers from high conductivity solution were proposed to be attributed to the presence of ribbon-shaped fibers. © 2016 Springer-Verlag Berlin Heidelberg


Chivatanasoontorn V.,Kyoto Institute of Technology | Yamada K.,Osaka Municipal Technical Research Institute | Kotaki M.,Kyoto Institute of Technology | Kotaki M.,Kaneka Americas Holding Inc.
Polymer (United Kingdom) | Year: 2015

Abstract Raman spectroscopy and wide-angle X-ray diffraction (WAXD) were used to evaluate microstructures, i.e. molecular orientation, crystalline orientation and the relative amount of β-phase crystal (K), near the surface of injection molded polypropylene (PP). It was found that highly ordered structure near the surface (0-30 μm) was formed when ultra-high injection speed (1000 mm/s or γ = 1670 s-1) was utilized. Subsequently, increase of relative amount of β-phase crystal near the surface was achieved. The relationship between the microstructures and surface mechanical properties measured by micro-cutting method and progressive load scratch tests was investigated. The highly oriented PP showed higher surface mechanical properties due to the increase in degree of molecular and crystalline orientation. The increased scratch properties were considered to be also affected by higher β-phase crystal content. © 2015 Elsevier Ltd.


Patent
Texas A&M University and Kaneka Americas Holding Inc. | Date: 2014-07-09

A method of manufacturing a nanocomposite having a continuous organic phase and oligomer-modified nanoplatelet that form mesomorphic structures, wherein the oligomer has a molecular weight of at least 100 g/mol.

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