Cyclic extrusion of recycled high density polyethylene/banana fiber/fly ash cenosphere biocomposites : thermal and mechanical retention properties / Sukanya Satapathy in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXIV, N° 1 (03/2019) . - p. 47-58 Titre : Cyclic extrusion of recycled high density polyethylene/banana fiber/fly ash cenosphere biocomposites : thermal and mechanical retention properties Type de document : texte imprimé Auteurs : Sukanya Satapathy, Auteur Année de publication : 2019 Article en page(s) : p. 47-58 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anhydride maléique Cendres volantes Cénosphères Composites -- Analyse Composites à fibres végétales -- Propriétés mécaniques Composites à fibres végétales -- Propriétés thermiques Copolymères greffés Fibres de banane Fibres végétales Matières plastiques -- Extrusion Morphologie (matériaux) Polyéthylène haute densité Produits et matériaux recyclés Réaction de couplage Index. décimale : 668.4 Plastiques, vinyles Résumé : Disposal of composite materials used vastly in structural applications raises the need to study the reprocessability of these systems for environmental benefits. In this paper, composites of recycled high density polyethylene (R) containing 30 wt.% banana fiber (BF)/7.5 wt.% fly ash cenospheres (FACS) were prepared with 3 wt.% maleic anhydride grafted high density polyethylene (MA-g-HDPE) as a coupling agent using twin screw extrusion followed by injection molding. The effects of thermal cycles (two times extrusion followed by injection molding) were studied on R and its composites. The samples were characterized by using tensile, flexural, izod impact tests, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry (TGA) and dynamic mechanical analysis (DMA). The tensile and flexural properties were improved by addition of both BF/FACS into the R matrix. The percentage retention in tensile properties of R/BF/FACS(E2) biocomposites (i.e. two times extrusion followed by injection molding) is more than 80 %, while that for flexural properties is more than 90 %. This indicates that R/BF/FACS composites exhibit good retention ability in mechanical properties after subjecting to two times twin-screw extrusion followed by injection molding. DSC results revealed that repeated extrusion improved the crystallization temperature and crystallinity of the composites with a slight reduction in melting temperature. From the TGA results, it was observed that the thermal stability (e.g. Tonset) of R was reduced by the addition of BF/FACS. However, repeated extrusion showed an improvement in thermal stability of the composites. Note de contenu : - EXPERIMENTAL : Materials - Preparation of RBF and RBFFACS biocomposites - Characterization of R and RBF, RBFFACS biocomposites - RESULTS AND DISCUSSION : Mechanical properties of R and RBF, RBFFACS biocomposites - Morphology of RBF and RBFFACS biocomposites - Thermal properties of R and RBF, RBFFACS biocomposites DOI : 10.3139/217.3597 En ligne : https://drive.google.com/file/d/1a0hdbsxsRk6VKPg921YRKRDY_MDwn4UA/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31911 [article]

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Effect of hexamethylene diisocyanate as compatibilizer on the mechanical properties of banana fiber/poly(butylene succinate) composites / Tetsuto Kajiyama in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 1 (03/2013)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXVIII, N° 1 (03/2013) . - p. 58-63 Titre : Effect of hexamethylene diisocyanate as compatibilizer on the mechanical properties of banana fiber/poly(butylene succinate) composites Type de document : texte imprimé Auteurs : Tetsuto Kajiyama, Auteur ; T. Yasuda, Auteur ; S. Mimoto, Auteur ; K. Shimizu, Auteur ; K. Hayashi, Auteur ; T. Yamanaka, Auteur ; M. Murakami, Auteur Année de publication : 2013 Article en page(s) : p. 58-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres -- Moulage par injection Composites à fibres végétales -- Propriétés mécaniques Diisocyanate d'hexaméthylène Fibres de banane Fibres végétales Hydroxyde de sodium L'hydroxyde de sodium, appelé également soude caustique7, est un corps chimique composé minéral de formule chimique NaOH, qui est à température ambiante un solide ionique. Fusible vers 318 °C, il se présente généralement sous forme de pastilles, de paillettes ou de billes blanches ou d'aspect translucide, corrosives et très hygroscopiques. Il est très soluble dans l'eau et légèrement soluble dans l'éthanol. La solution d'hydroxyde de sodium, souvent appelée soude, est une solution aqueuse transparente. Concentrée, elle est corrosive et souvent appelée lessive de soude. Les propriétés chimiques de l'hydroxyde de sodium sont surtout liées à l'ion hydroxyde HO- qui est une base forte. En outre, l'hydroxyde de sodium réagit avec le dioxyde de carbone (CO2) de l'air et se carbonate. La solubilité de la soude caustique dans l'eau augmente avec la température, à pression constante ou ambiante. Mélange Polybutylène succinate Résistance au chocs Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : We prepared banana fiber (BF)/poly(butylene succinate) (PBS) composites using hexamethylene diisocyanate (HDI) as a compatibilizer. BF was treated with NaOH aqueous solution (BF-A). Both BF/PBS/HDI and BF-A/PBS/HDI composites were made by applying a batch type twin-kneader at 130 °C. Dumbbell specimens were prepared by an injection molding machine at 130 °C. Effect of concentration of NaOH aq on tensile strength and impact strength, effect of amount of HDI on tensile strength and Izod impact strength, and effect of mixing time on tensile strength and Izod impact strength of BF/PBS/HDI and BF-A/PBS/HDI composites were studied. When contents of HDI in composites were increased, tensile strength increased. In addition, when mixing times were increased, tensile strength increased. Although the mechanical properties of PBS were first degraded with the addition of BF, alkaline treatment to BF and the addition of HDI improved the mechanical properties. This probably due to the promotion of the adhesion between BF and PBS. The surface morphology of the fracture surfaces of the composites were observed with a scanning electron microscope (SEM). It shows that higher mechanical properties can be expected from compatibilized composites based on BF-As with aliphatic polyesters. Note de contenu : - EXPERIMENTS : Materials - Alkaline treatment of banana fiber - Mixing of materials - Molding of composites - Mechanical test of composites - SEM observation - RESULTS AND DISCUSSION : Effect of concentration of NaOH Aq on tensile properties and izod impact strength - Effect of amount of HID on tensile properties and izod impact strength - Effect of mixing time on the strength of PB/PBS/HDI DOI : 10.3139/217.2661 En ligne : https://drive.google.com/file/d/1t2_US46qJUEJIfiGIvRl5RP6cNfg9mzE/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17765 [article]

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Investigation on mechanical, thermal and water absorption properties of banana/coir reinforced polypropylene hybrid composites / Bujjibabu Gunturu in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 3-4 (08/2020)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 30, N° 3-4 (08/2020) . - p. 123-131 Titre : Investigation on mechanical, thermal and water absorption properties of banana/coir reinforced polypropylene hybrid composites Type de document : texte imprimé Auteurs : Bujjibabu Gunturu, Auteur ; Chittaranjandas Vemulapalli, Auteur ; Ramakrishna Malkapuram, Auteur ; Nagarjuna Konduru, Auteur Année de publication : 2020 Article en page(s) : p. 123-131 Note générale : Bibliogr. Langues : Français (fre) Catégories : Composites à fibres végétales -- Propriétés mécaniques Composites à fibres végétales -- Propriétés thermiques Diffractométrie de rayons X Fibres de banane Fibres de coco Flexion (mécanique) Fourier, Spectroscopie infrarouge à transformée de Humidité -- Absorption:Eau -- Absorption Polypropylène Résistance au chocs Thermogravimétrie Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : This study explores the merits of B/C fibers reinforced polypropylene to developed high mechanical performance, cost effective and light weight hybrid composite. B/C fibers reinforced polypropylene hybrid composites were prepared with different proportions. Variation in Banana, Coir and B/C fibers in hybrid composites, reveal the tensile, flexural, impact strength and water absorption. The PP and Banana, Coir fibers reinforced Composites were prepared by the twin screw extrusion of PP 80% with B-20, C-20 and B/C 15/5, 10/10 and 5/15 wt%. After extrusion, the extraction strands cut into pallets and injection molded machine make the test specimens. It was found that maximum tensile strength, the flexural strength and the impact strength at 20% of banana fiber. Tensile, flexural and impact strengths marginally have been decreased when decrease the banana fiber in the B/C fiber reinforced polypropylene hybrid composites. Also observed water absorption of same composites for 24 hrs., 48 hrs. and 72 hrs. Thermogravimetry analysis (TGA), fourier transform infrared spectroscopy (FTIR) and XRD (X ray diffraction) was examined. Note de contenu : - MATERIALS AND METHODS : Materials - Manufacturing of composites - Mechanical testing - Water absorption - Thermal properties - FTIR - XRD (X-ray diffraction) - RESULTS AND DISCUSSION : Tensile properties - Flexural properties - Impact strength - Water absorption - TGA &DTG - FTIR - XRD analysis - Table 1 : Mechanical properties of B/C reinforced polypropylene hybrid composites - Table 2 : Percentage of water absorption of B/C fiber reinforced polypropylene hybrid composite - Table 3 : Functional groups of hybrid composites DOI : https://doi.org/10.18280/rcma.303-402 En ligne : https://www.iieta.org/download/file/fid/39662 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37638 [article]

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Nonwovens made from blends of banana-polypropylene fibers / N. B. Timble in CHEMICAL FIBERS INTERNATIONAL, Vol. 71, N° 4 (12/2021)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > Vol. 71, N° 4 (12/2021) . - p. 185-186 Titre : Nonwovens made from blends of banana-polypropylene fibers Type de document : texte imprimé Auteurs : N. B. Timble, Auteur Année de publication : 2021 Article en page(s) : p. 185-186 Langues : Anglais (eng) Catégories : Aiguilletage L'aiguilletage consiste en la consolidation d'un non-tissé déjà formé par une étape de cardage voie nappée. Il a pour but de créer des ponts de fibres verticaux entre les différentes nappes afin de les maintenir ensembles. Pour cette raison, l'aiguilletage ne peut s'appliquer qu'aux fibres ayant une longueur supérieure à 40mm. Il est à noter qu'un aiguilletage réussi engendre une rétraction en largeur du non-tissé. Bananes et constituants Fibres de banane Géotextiles Liage Nontissés Polypropylène Index. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : In this paper the manufacturing of nonwovens made from blends of polypropylene (PP) and banana fibers is reported using needlepunching and thermal bonding (calendar) nonwovens technologies and also finally concluded that they are used for avoiding landslide near river. This is because the nonwovens properties tested satisfied customers using these to avoid landslide near river. The fabric properties tested were weight, thickness, air permeability and tensile strength. Also normalized tensile strength was calculated dividing tensile strength by weight. In this project banana pseudostems taken from the banana fiber plantation farm were fed into the banana fiber extractor machine purchased from ecogreen unit and banana fibers were extracted. Since the yield was low the banana fibers were directly ordered from the banana fiber supplier and taken to NIRJAFT (National Institute of Research on Jute and Allied Fibre Technology), Calcutta/India, and converted into nonwovens using needlepunching and thermal bonding. These nonwovens can be marketed for usage in to avoid landslide near river since they meet fabric properties required for usage in to avoid land slide near river. Note de contenu : - Material - Fiber softening - Fiber conditioning - Needlepunching - Material testing - Table : Properties of needle punched/thermal bonded nonwovens made from banana/PP blend En ligne : https://drive.google.com/file/d/1o3yIDUaCst9uJvlxtyeBI3EuY67fA85l/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36963 [article]

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Nonwovens made from blends of banana/polypropylene fibers / N. B. Timble in CHEMICAL FIBERS INTERNATIONAL, (10/2022)  

[article]  inCHEMICAL FIBERS INTERNATIONAL > (10/2022) . - p. 58-59 Titre : Nonwovens made from blends of banana/polypropylene fibers Type de document : texte imprimé Auteurs : N. B. Timble, Auteur Année de publication : 2022 Article en page(s) : p. 58-59 Langues : Anglais (eng) Catégories : Fibres de banane Géotextiles Mélanges de fibres Nontissés Nontissés -- Propriétés mécaniques Polypropylène Index. décimale : 677.6 Tissus obtenus par des procédés spéciaux, quelle que soit leur composition : jacquard, feutres tissés et non tissés, tapisseries, tissus ajourés Résumé : In this paper the manufacturing of nonwovens made from blends of polypropylene (PP) and banana fibers is reported using needlepunching and thermal bonding (calendar) nonwovens technologies and also finally concluded that they are used for avoiding landslide near river. This is because the nonwovens properties tested satisfied customers using these to avoid landslide near river. The fabric properties tested were weight, thickness, air permeability and tensile strength. Also normalized tensile strength was calculated dividing tensile strength by weight. In this project banana pseudostems taken from the banana fiber plantation farm were fed into the banana fiber extractor machine purchased from ecogreen unit and banana fibers were extracted. Since the yield was low the banana fibers were directly ordered from the banana fiber supplier and taken to NIRJAFT (National Institute of Research on Jute and Allied Fibre Technology), Calcutta/India, and converted into nonwovens using needlepunching and thermal bonding. These nonwovens can be marketed for usage in to avoid landslide near river since they meet fabric properties required for usage in to avoid land slide near river. Note de contenu : - Material - Fiber softening - Fiber conditioning - Needlepunching - Material testing - Table : Properties of needle punched/thermal bonded nonwovens made from banana/PP blend En ligne : https://drive.google.com/file/d/1yEmcwYrjgchTtswqy0H_uo_7EQJzpzzH/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38410 [article]

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