Tensile properties of bacterial cellulose nanofibers - polyester composites

Abral, Hairul; Mahardika, Melbi

doi:10.1088/1757-899x/137/1/012019

Cited by 8 publications

(4 citation statements)

References 7 publications

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“…Comparing obtained results with other researches [15,24,25] it was confirmed that strong and resilient to mechanical impact dry bacterial cellulose biomaterial can be produced from Kombucha.…”

Section: Fig 4 Typical Tensile Strengthextension Curves Obtained Fosupporting

confidence: 79%

“…This is confirmed by the recording of higher sample thickness values as well. The surface shrinkage might appear due to more rapid water evaporation at higher drying temperature that as was described in research [25] causes a closer contact between nanofibers and agglomeration. Change of biomaterial hardness was estimated -BC material dried at lower temperature obtains more soft structure (Shore A value 41 for BC25) as samples dried at higher temperatures derive medium soft (Shore A value 46 for BC50) and medium hard (Shore A value 61 for BC75) nature.…”

Section: The Influence Of Drying On Size Parameters and Hardnessmentioning

confidence: 87%

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Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

Sederavičiūtė¹,

Domskienė²,

Baltiņa³

2019

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The article presents an experimental study of mechanical properties of cellulose biofilm produced by bacterial fermentation process. Naturally derived biomaterial has great current and potential applications therefore the conditions of material preparation as well as control and prediction of mechanical properties is still a relevant issue. Bacterial cellulose was obtained as a secondary product from Kombucha drink. Presented technique for material preparation and drying is particularly simple and easy to access. The influence of drying temperature (25 °C, 50 °C and 75 °C) on the sample size (thickness and planar dimensions) and mechanical properties (tensile and bursting strength) of cellulose biofilm has been evaluated. It was estimated that during drying biofilm specimens lost up to 92 % of weight and up to 87 % of thickness therefore planar specimen dimensions varied insignificantly. The study showed that the drying temperature is important for optimum strength properties of bacterial cellulose biofilm. The maximum tensile strength (27.91 MPa) was recorded for the samples dried at temperature of 25 °C, when the moisture from the biomaterial is removed gradually and good deformation properties are ensured (respectively tensile extension 18.8 %). Under higher drying temperature biomaterial shows lower values of tensile strength and higher values of bursting strength. The maximum bursting strength (57.2 MPa) was recorded for samples dried at 75 °C when punch displacement changes were insignificant for all tested samples (from 17.8 mm to 21.7 mm). DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20764

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Section: Fig 4 Typical Tensile Strengthextension Curves Obtained Fosupporting

confidence: 79%

Section: The Influence Of Drying On Size Parameters and Hardnessmentioning

confidence: 87%

Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

Sederavičiūtė¹,

Domskienė²,

Baltiņa³

2019

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“…These include water hyacinth [10][11][12], oil palm empty fruit bunch (OPEFB) [13], banana (pseudo stem), jute (stem) and pineapple leaf fiber [2], arecanut husk fiber [14], kenaf bast (Hibiscus cannabinus) [15], coconut husk [16], Helicteres isora plant [17] and bacterial cellulose [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Production of Nanocellulose from Pineapple Leaf Fibers via High-Shear Homogenization and Ultrasonication

Mahardika

Abral

Kasim

et al. 2018

Fibers

187

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Abstract:In this study, the isolation and characterization of nanocellulose from pineapple leaf fibers (PLF) were carried out. Chemical pretreatment included pulping, bleaching, and acid hydrolysis to remove lignin, hemicellulose, and extractive substances were conducted. This was followed by high-shear homogenization and ultrasonication to produce nanocellulose. Morphological changes to the PLF due to treatment were investigated using scanning electron microscopy (SEM). This showed that the PLF had a diameter of 1-10 µm after high-shear homogenizing. Transmission electron microscopy (TEM) indicated that the nanofibers after ultrasonication for 60 min showed 40-70 nm diameters. Particle size analysis (PSA) indicates that the fibers had an average diameter of 68 nm. Crystallinity index was determined by X-ray diffraction (XRD) and had the highest value after acid hydrolysis at 83% but after 60 min ultrasonication, this decreased to 62%. Meanwhile, Fourier transform infrared (FTIR) spectroscopy showed there was no chemical structure change after acid hydrolysis. The most significant finding from thermal gravimetric analysis (TGA) is that the higher degradation temperature of nanofibers indicates superior thermal stability over untreated fiber. These results indicate that PLF waste could become a viable source of commercially valuable nanocellulose.

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“…Penggunaan serat alam (sabut kelapa) sebagai bahan pengisi pada matriks polimer PLA menawarkan beberapa keuntungan karena mudah ditemukan dan tersedia dalam jumlah besar di daerah sekitarnya, murah, dan mudah diolah menjadi bahan pengisi [10,11]. Campuran PLA dan serat sabut komposit benar-benar dapat terdegradasi, lebih ringan dan lebih murah, tetapi kombinasi ini masih memiliki beberapa keterbatasan.…”

Section: Pendahuluanunclassified

PENGARUH SIFAT MATERIAL DAN TERMAL KOMPOSIT PLA (POLY LACTID ACID)/COCONUT FIBER (SABUT KELAPA) DENGAN MODIFIKSI PERENDAMAN NaOH

Ridwan¹,

Rihayat²,

Ilmi³

et al. 2022

J.Scien.Techno.Reaction

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ABSTRAKPLA (Poly Lactid Acid) dengan penambahan serat sabut kelapa (Coir) sebagai pengisi dengan memvariasikan fraksi volume polimer: pengisi yaitu 80% : 20% (XcN1, XcN2) , 70% : 30% (XcN3, XcN4), 60% : 40% (XcN5, XcN6) dan 50% : 50% (XcN7, XcN8). Serat sabut kelapa yang digunakan sebagai bahan pengisi terlebih dahulu dimodifikasi menggunakan NaOH dengan variasi konsentrasi 30% dan 40%. Komposit PLA-sabut dibentuk dengan pencampuran melalui metode peleburan dengan ekstruder dan hot press. Berdasarkan hasil uji termal pada TGA pada sampel XcN8 di dapat kekuatan termal yang baik yaitu 399,17oC, menunjukkan peningkatan suhu degradasi termal pada komposit dengan meningkatnya konsentrasi NaOH. Nilai kuat tarik maksimum terdapat pada komposit PLA-Coir dengan variasi konsentrasi NaOH 40%, fraksi volume 50% : 50% dan waktu tahan selama 25 menit dengan nilai 22,63 MPa. Dari hasil pengujian lentur, kuat lentur komposit juga meningkat dengan bertambahnya konsentrasi NaOH dan jumlah filler yang digunakan. Hasil analisis (FT-IR) terhadap pada sampel XcN8 dapat dilihat bahwa terdapat gugus fungsi –OH. Hal ini dapat dilihat pita serapan 3192,33 cm-1 yang merupakan gugus –OH dari lignin. Kemudian dari pengujian SEM sampel dengan perendaman NaOH 40% memberikan kemampuan homogenitas antara serat dan polimer pada pembuatan komposit memiliki seratnya cukup baik. Kata kunci : Polylactid Acid, Pengisi, Sabut, Komposit, NaOH

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Tensile properties of bacterial cellulose nanofibers - polyester composites

Cited by 8 publications

References 7 publications

Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

Production of Nanocellulose from Pineapple Leaf Fibers via High-Shear Homogenization and Ultrasonication

PENGARUH SIFAT MATERIAL DAN TERMAL KOMPOSIT PLA (POLY LACTID ACID)/COCONUT FIBER (SABUT KELAPA) DENGAN MODIFIKSI PERENDAMAN NaOH

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