研究者詳細 - 安藤　義人

論文 - 安藤　義人

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Surface modification for nano‐lignocellulose fiber through vapor‐phase‐assisted surface polymerization 招待有り査読有り国際誌

Kubra Eksiler, Yoshito Andou, Hidayah Ariffin, Yoshihito Shirai.

J. Polym. Sci., Part A: Polym. Chem. ( Wiley ) 57 ( 24 ) 2575 - 2580 2019年10月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

This study addresses the inherent issues surrounding surface modification methods of nanofibers and proposes an environmentally friendly and less toxic strategy for the surface modification of hydrophilic nanofiber. From the continuation of our previous work, which discussed the easy production of nanofiber (average size: 127 nm) from oil palm mesocarp fiber (OPMF), in this work, the surface of nanofibers (M-IL-OPMF) were modified through vapor-phase-assisted surface polymerization (VASP) to improve the affinity of interface between the polymer grafted M-IL-OPMF and non-polar matrix. VASP of ε-caprolactone was successfully proceeded from the [M-IL-OPMF] at 70 °C for 24 h and 72 h, and compositions were estimated to be 35.7% fiber/64.3% polymer and 27.8% fiber/72.2% polymer. To confirm the grafting of PCL, size-exclusion chromatography (SEC) and Fourier transform infrared (FT-IR) spectroscopy, thermogravimetry (TG), and dispersibility test in hydrophobic solvent were carried out. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2575–2580.

DOI： 10.1002/pola.29532

Scopus

CiNii Research

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Implication of Molecular Weight on Optical and Charge Transport Anisotropy in PQT-C12 Films Fabricated by Dynamic FTM 査読有り国際誌

Tripathi A.S.M., Sadakata S., Gupta R.K., Nagamatsu S., Ando Y., Pandey S.S.

ACS Appl. Mater. Interfaces ( American Chemical Society ) 11 ( 31 ) 28088 - 28095 2019年08月

記述言語：英語掲載種別：研究論文（学術雑誌）

Large area (>20 cm × 2 cm)-oriented thin films of PQT-C12 with varying molecular weight and polydispersity index (PDI) were fabricated by the ribbon-shaped floating film transfer method aiming toward their application as an active semiconductor element of organic field effect transistors (OFETs). Investigation on the influence of the molecular weight and PDI upon the extent of molecular alignment and anisotropic charge transport was systematically carried out. It has been demonstrated that high molecular weight in combination with low PDI not only leads to a very high optical anisotropy >10 but also high charge carrier anisotropy with a hole mobility of about 0.07 cm2/V·s for OFETs using parallel-oriented PQT-C12 thin films. Such a structure-property correlation is highly beneficial for the development of high performance organic electronic devices by synergistic and amicable tuning of the optoelectronic anisotropies and polymer synthetic variables.

DOI： 10.1021/acsami.9b06568

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Biological pretreatment of oil palm empty fruit bunch by Schizophyllum commune ENN1 without washing and nutrient addition 査読有り国際誌

Arbaain E.N.N., Bahrin E.K., Ibrahim M.F., Ando Y., Abd-Aziz S.

Processes 7 ( 7 ) 2019年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

Washing and drying are common steps for oil palm empty fruit bunch (OPEFB) preparation prior to pretreatment. However, the mass balance of OPEFB preparation proved a major loss of OPEFB during the washing and drying steps. An indigenous fungus, Schizophyllum commune ENN1 was used for delignification of unwashed OPEFB in biological pretreatment without nutrient addition. S. commune ENN1 achieved a maximum lignin removal of 53.8% after 14 days of biological pretreatment of unwashed OPEFB. S. commune ENN1 was able to grow on unwashed OPEFB during biological pretreatment at 55% of moisture content and 5% of oil residue. The highest amount of reducing sugars obtained from OPEFB pretreated by S. commune ENN1 was 230.4 ± 0.19 mg/g with 54% of hydrolysis yield at 96 h. In comparison, the sugar yield of OPEFB pretreated by Phanerochaete chrysosporium was 101.2 ± 0.04 mg/g. This study showed that S. commune ENN1 was feasible to remove lignin of OPEFB through biological pretreatment for enzymatic saccharification without washing and addition of nutrients.

DOI： 10.3390/pr7070402

Scopus

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Biological Pretreatment of Oil Palm Empty Fruit Bunch by Schizophyllum commune ENN1 without Washing and Nutrient Addition 査読有り

Enis Natasha Noor Arbaain, Ezyana Kamal Bahrin, Mohamad Faizal Ibrahim, Yoshito Ando, Suraini Abd-Aziz.

Processes 7 402 2019年07月

Effect of glucose and ascorbic acid on total phenolic content estimation of green tea and commercial fruit juices by using Folin Ciocalteu and fast blue BB assays 査読有り

Roslan A.S., Ando Y., Azlan A., Ismail A.

Pertanika Journal of Tropical Agricultural Science - 545-556 2019年05月

Development of Organo-Dispersible Graphene Oxide via Pseudo-Surface Modification for Thermally Conductive Green Polymer Composites 査読有り国際誌

Sim S., Andou Y., Bashid H.A.A., Lim H., Altarawneh M., Jiang Z., Eksiler K., Iikubo S.

ACS Omega 2018年12月

Synthesis and characterization of lithium titanate (Li4Ti5O12) nanopowder for battery applications 査読有り国際誌

Selvamurugan M., Natarajan C., Andou Y., Karuppuchamy S.

Journal of Materials Science: Materials in Electronics 29 ( 20 ) 17826 - 17826-17833 2018年10月

記述言語：英語掲載種別：研究論文（学術雑誌）

Nanostructured lithium titanate (Li4Ti5O12) nanopowder was successfully synthesized by simple peroxide route using titanium oxysulphate and lithium hydroxide. The structural properties of the as-prepared and sintered powders were characterized by using powder X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy. Surface morphological property was studied by scanning electron microscope. Compositional analysis was studied using X-ray photo electron spectroscopy. The thermal degradation behavior of the as-synthesized materials was analyzed by thermo gravimetric analysis (TG–DTA). The electrochemical properties of the Li4Ti5O12 nanopowders were examined using galvanostatic charge/discharge test. The effect of sintering temperature on its various physical properties and the electrochemical performances of Li4Ti5O12 was investigated. The storage capacity value obtained for Li4Ti5O12 and Li4Ti5O12/graphite composite anode was 83.52 and 91.33 mAhg−1 in 1 M LiPF6 at 0.1 mA.

DOI： 10.1007/s10854-018-9895-1

Scopus

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Natural fiber for green technology in automotive industry: A brief review 査読有り国際誌

Ramli N., Mazlan N., Ando Y., Leman Z., Abdan K., Aziz A.A., Sairy N.A.

IOP Conference Series: Materials Science and Engineering 368 ( 1 ) 2018年07月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Fiber reinforced polymeric composites have been known and widely used because of their high specific strength and modulus compared to metals. In the last few years, biomaterials listed as a demand technology to be exploring by researchers especially in industrial purpose. This is push by environmental awareness and the over use of petrol resources lead to the development of new materials, called biocomposites, which will maintain a better future. This paper will be discussing about a brief review of natural fibers, use in automotive industry to achieve a green technology target in manufacturing of cars specifically. It's a fact that, related to weight reduction, the automotive industry can take advantages of using these materials, not only because of extinction of oil reserve, but because of high ability and importance of these materials itself in automobiles. Currently, most composites in the market are focused with long-term durability design while using nondegradable polymeric resins such as epoxies and high-strength fiber such as glass. All these materials prove to be a good characteristic of composite but still lack in environmental concern. This polymer and fiber are derived from petroleum, a nonreplenishable commodity. The momentum is to use biocomposites in common plastics to improve performance. Since the main purpose of this paper is to show a bio-composite which is suitable to replace the existing interior of automotive design, the work has focused on obtaining that bio-composite, taking account into the raw-materials cost reduction and the maintenance of the manufacturing process based on current scenario. The automotive industry is in their way to expand green technology in composites because the need is greatest. But producing the composites is energy intensive and polluting, while the durability of conventional composites, often seen as an advantage, is also their biggest challenge. Current fibers use in industry right now is difficult to dispose. They do not degrade naturally and could linger for generations.

DOI： 10.1088/1757-899X/368/1/012012

Scopus

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Characteristics of cellulose from oil palm mesocarp fibres extracted by multi-step pretreatment methods 査読有り国際誌

Megashah L.N., Ariffin H., Zakaria M.R., Ando Y.

IOP Conference Series: Materials Science and Engineering 2018年07月

Simple Manufacture of Surface-Modified Nanolignocellulose Fiber via Vapor-Phase-Assisted Surface Polymerization 査読有り国際誌

Eksiler K., Andou Y., Shirai Y.

ACS Omega 3 ( 4 ) 4545 - 4550 2018年04月

記述言語：英語掲載種別：研究論文（学術雑誌）

This work tackles the disadvantages in the production of functionalized nanofibers from biomass and offers a new methodology to nanofiber-reinforced composite manufacturing. A vapor-phase-assisted surface polymerization (VASP) method has been used to develop surface-modified lignocellulosic nanofibers. Through the vaporized monomers during polymerization, the polymer chains can be introduced deep within oil palm mesocarp fibers (OPMFs) due to their unique porous structure. After OPMFs are modified with polymer chains, the simple Mortar grinder mill-ionic liquid (M-IL) method provides fibrillation from the macro- to nanoscale, retaining the grafted polymer chains. This approach for the functionalization of biomass could lead to the large-scale fabrication of surface-modified nanofibers for reinforced materials and promote innovative implementations of the renewable biomass resource.

DOI： 10.1021/acsomega.8b00338

Scopus

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Simple Manufacture of Surface-Modified Nanolignocellulose Fiber via Vapor-Phase-Assisted Surface Polymerization 査読有り国際誌

Yoshito Ando, Kubra Eksiler, Yoshihito Shirai

ACS OMEGA ( American Chemical Society ) 2018年04月

Effects of Deposition Parameters on the Electrochemical Behaviour of ZnO Thin Film 査読有り国際誌

A.L.T. Zheng, Y. Andou, R.M. Zawawi,

Journal of Advanced Chemical Sciences 3 ( 4 ) 521 - 524 2018年01月

Voltammetric Determination of Dopamine Mediated By Nanoparticle WO3/MWCNT Modified Glassy Carbon Electrode 査読有り国際誌

ALT Zheng, Y Ando, RM Zawawi

International Journal of Applied Chemistry ( Research India Publications ) 13 ( 4 ) 899 - 912 2017年12月

Green polymer blends compatibilized with biomass derived-agents 査読有り国際誌

Kubra Eksiler, Yoshito Andou, Yoshihito Shirai

Academia Journal of Environmental Science ( Academia Publishing ) 5 ( 11 ) 193 - 199 2017年11月

Design of biodegradable PCL/PI films as a joining tape for grafting plant 査読有り

Eksiler K., Andou Y., Nakayama N., Yoshinaga K., Shirai Y.

Environmental Technology (United Kingdom) 38 ( 18 ) 2362 - 2372 2017年09月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

In this study, novel eco-friendly blends based on environmental-friendly polymers and compatibilizers, such as poly(ϵ-caprolactone) (PCL), cis-1,4-polyisoprene (PI), soybean lecithin (SOLE) and acrylated-epoxidized soybean oil (AESO), have been prepared in order to suggest a biodegradable joining tool used for plant grafting in agriculture, which will be competitive from the environment and economic points of view against conventional nonbiodegradable tools. PCL/PI blends, in which the portion of PCL was 75 and 50, were mixed with a compatibilizer by a melt-blending technique. The resulting blends were investigated by thermogravimetric analysis, differential scanning calorimetry and scanning electron microscopy and also their mechanical properties were determined. Afterwards, the blend films were buried in the soil. Remarkable level of weight loss was achieved in 6 weeks, ∼46%. The results showed that the addition of SOLE helped to improve the compatibility between PCL and PI due to its amphipathic property, and, besides, accelerated the weight loss of the films in soil, increasing microorganism growth on the film.

DOI： 10.1080/09593330.2016.1261186

Scopus

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金属加工廃棄物を利用した機能性複合材料の特徴

安藤義人, Kubra Eksiler, 西口秀和, 吉廣稔

プラスチックス ( 日本工業出版（株） ) 2017年07月

Functionalized Graphene Oxide-Reinforced Electrospun Carbon Nanofibers as Ultrathin Supercapacitor Electrode（共著）査読有り国際誌

CheeW.K., LimH.N., Y.Andou, Z.Zainal, A.A.B.Hamra, I.Harrison, M.Altarawneh, JiangZ.T., HuangN.M

Journal of Energy Chemistry 26 ( 4 ) 790 - 798 2017年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

Graphene oxide has been used widely as a starting precursor for applications that cater to the needs of tunable graphene. However, the hydrophilic characteristic limits their application, especially in a hydrophobic condition. Herein, a novel non-covalent surface modification approach towards graphene oxide was conducted via a UV-induced photo-polymerization technique that involves two major routes; a UV-sensitive initiator embedded via pi-pi interactions on the graphene planar rings, and the polymerization of hydrophobic polymeric chains along the surface. The functionalized graphene oxide successfully achieved the desired hydrophobicity as it displayed the characteristic of being readily dissolved in organic solvent. Upon its addition into a polymeric solution and subjected to an electrospinning process, non-woven random nanofibers embedded with graphene oxide sheets were obtained. The prepared polymeric nanofibers were subjected to two-step thermal treatments that eventually converted the polymeric chains into a carbon-rich conductive structure. A unique morphology was observed upon the addition of the functionalized graphene oxide, whereby the sheets were embedded and intercalated within the carbon nanofibers and formed a continuous structure. This reinforcement effectively enhanced the electrochemical performance of the carbon nanofibers by recording a specific capacitance of up to 140.10 F/g at the current density of 1 A/g, which was approximately three folds more than that of pristine nanofibers. It also retained the capacitance up to 96.2% after 1000 vigorous charge/discharge cycles. This functionalization technique opens up a new pathway in tuning the solubility nature of graphene oxide towards the synthesis of a graphene oxide-reinforced polymeric structure.

DOI： 10.1016/j.jechem.2017.04.007

Scopus

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Electrospun graphene nanoplatelets-reinforced carbon nanofibers as potential supercapacitor electrode（共著）査読有り国際誌

) Chee, W.K., Lim, H.N., Zainal, Z, Harrison, I., Andou, Y., Huang N.M., Altarawneh, M., Jiang, Z.T.

Materials Letters 199 200 - 203 2017年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

The combination of graphene nanoplatelets and carbon nanofibers were successfully fabricated by utilizing a one-step solution based on the electrospinning technique. A distinctive morphology was observed in which the platelets were suspended between the fibrous structure that significantly improved the specific capacitance of the nanofiber to 86.11 F g−1, twice the increment from its original structure. Furthermore, all of the graphene nanoplatelets-reinforced samples recorded an optimal performance of over 90% capacitive retention after 1000 continuous charge/discharge cycles, regardless of the GnP concentration. These findings indirectly reflect the potential of CNF as the electrode material in the fabrication of high performance supercapacitor devices.

DOI： 10.1016/j.matlet.2017.04.086

Scopus

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Facile synthesis of Co–WO<inf>3</inf>/functionalized carbon nanotube nanocomposites for supercapacitor applications 査読有り

Dhilip Kumar R., Andou Y., Karuppuchamy S.

Journal of Materials Science: Materials in Electronics 28 ( 7 ) 5425 - 5434 2017年04月

記述言語：英語掲載種別：研究論文（学術雑誌）

Co–WO3/functionalized carbon nanotube (f-CNT) nanocomposites have been prepared by solution growth technique. The physico-chemical characterization of the prepared nanocomposites was carried out by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy techniques. The XRD analysis revealed the formation of orthorhombic phase of the prepared nanopowder. The SEM images showed the porous structured morphologies. The electrochemical behavior of the undoped and doped/f-CNT modified electrodes was investigated using electrochemical impedance spectroscopy, cyclic voltammetry and galvanostatic charge–discharge techniques. The specific capacitance of 60.14 F/g was achieved for the Co–WO3/f-CNT nanocomposites.

DOI： 10.1007/s10854-016-6203-9

Scopus

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Facile synthesis of Co-WO3/functionalized carbon nanotube nanocomposites for supercapacitor applications 査読有り

Dhilip Kumar, R., Andou, Y., Karuppuchamy, S.

Journal of Materials Science: Materials in Electronics 2017年04月

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