Properties of Polymer Composites with Cellulose Microfibrils

Panaitescu, Denis Mihaela; Vuluga, Dumitru Mircea; Paven, Horia; Iorga, Michaela; Ghiurea, Marius; Matasaru, Ileana; Nechita, Petronela

doi:10.1080/15421400801903502

Cited by 37 publications

(33 citation statements)

References 16 publications

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“…This strength is contributed by the crystallinity, surface area, and active interfaces of the nanometer size fibers (Panaitescu et al 2008). Crystalline cellulose nanofibers are typically known as nanowhiskers, with an elastic modulus range of 120 to 150 GPa (Šturcová et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Polyvinyl Alcohol-Based Composite Reinforced with Nanocellulose and Nanosilica

et al. 2015

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This work reported the thermomechanical and morphological properties of polyvinyl alcohol (PVA) nanocomposites reinforced with nanosilica and oil palm empty fruit bunches derived nanocellulose. The nanocomposites were characterized by mechanical, thermal, XRD, optical, and morphological studies. Uniformity dispersion of the nanofillers at a 3 wt% concentration has been shown by scanning electron microscopy, whereas the changes in crystallinity were demonstrated by X-ray diffraction analysis. Addition of nanosilica resulted in increased thermal stability of PVA/nanocellulose composites due to the reduction in mobility of the matrix molecules. Visible light transmission showed that the addition of 0.5 wt% nanosilica only slightly reduced the light transmission of PVA/nanocellulose composites with 3 wt% nanocellulose. The addition of a small concentration of nanosilica successfully improved the tensile and modulus properties of PVA/nanocellulose composite films. The increases in tensile strength and thermal stability were evidence of a nanosilica contribution in PVA/nanocellulose composites, inducing reinforcement, as detected by the thermomechanical properties.

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Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Polyvinyl Alcohol-Based Composite Reinforced with Nanocellulose and Nanosilica

et al. 2015

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“…They are also renewable, recyclable, and biodegradable, and demonstrate excellent mechanical characteristics like flexibility, high specific strength, and high specific modulus [17,18]. For example, wood-derived cellulose can be used for toughening epoxy and other polymers [19][20][21][22], and bamboo fibres improve the flexural strength of concrete [23]; the same desirable effect has been observed in wood fibre reinforced concrete [24]. Cotton fabrics also enhance the strength and toughness of geopolymer [25], and wool and flax fibres have been successfully used to reinforce geopolymer composites, with improvements in mechanical and fracture properties [26,27].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of mechanical and thermal properties in flax fabric reinforced geopolymer composites

et al. 2015

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This paper presents the mechanical and thermal properties of flax fabric reinforced fly ash based geopolymer composites. Geopolymer composites reinforced with 2.4, 3.0 and 4.1 wt% woven flax fabric in various layers were fabricated using a hand lay-up technique and tested for mechanical properties such as flexural strength, flexural modulus, compressive strength, hardness, and fracture toughness. All mechanical properties were improved by increasing the flax fibre contents, and showed superior mechanical properties over a pure geopolymer matrix. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) studies were carried out to evaluate the composition and fracture surfaces of geopolymer and geopolymer/flax composites. The thermal behaviour of composites was studied by thermogravimetric analysis (TGA) and the results showed significant degradation of flax fibres at 300 ℃.

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“…마이크로피브릴은 리파이닝 (refining)이나 호모게나이징(homogenizing)과 같은 기계적 처리를 통해 식물 세포벽으로부터 분리하여 나노크기의 마 이크로피브릴화 셀룰로스(microfibrillated cellulose, MFC) 의 형태로 제조하거나, 정제과정을 거쳐 미세결정셀룰로스 (microcrystalline cellulose, MCC)의 형태로 제조할 수 있 다 [9][10][11]. 특히 최근의 극세화와 경량화 제품개발 경향에 따라 나노소재에 대한 관심이 매우 높아졌고, 섬유복합재 료의 보강재로 MCC나 MFC를 통해 나노크기를 갖도록 제 조된 셀룰로스 나노섬유(cellulose nanofiber, CNF)가 적용 되고 있다 [12]. 폴리우레탄(polyurethane, PU)과 MCC의 복 합재료에 대한 선행연구 [13] …”

Section: 서 론unclassified

Structure and Mechanical Properties of Thermoplastic Composites Using Microcrystalline Cellulose Nanofibers

Lee¹,

Yoon²,

Kim³

et al. 2013

Textile Science and Engineering

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In this study, cellulose nanofibers (CNFs), that is, nanosized cellulose fibers, are manufactured from microcrystalline cellulose (MCC) by using a high-pressure homogenizer. The CNFs are used as reinforcing materials for thermoplastic composites. Polyamide (PA6) and polylactic acid (PLA) fibers are employed as the matrix in the thermoplastic composites. With an increase in the operation pass number and pressure of the homogenizer, the specific surface area (SSA) of the CNFs increases and the crystalline index (CI) decreases. After 30 passes of MCC through the homogenizer, the SSA increases from 257.2 m 2 /g to 787.1 m 2 /g, and the CI decreases from 0.78 to 0.70. The tensile strength of the CNF/PA6 composite is higher than that of the CNF/PLA composite. On the other hand, the modulus of the CNF/PLA composite is higher than that of the CNF/PA6 composite. As the CNF content in the composite increases, the total thickness of composite decreases but the tensile strength increases. The CNF/PA6 (3:7) composite has the maximum tensile strength (21.5 MPa) among the samples considered in this study.

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Properties of Polymer Composites with Cellulose Microfibrils

Cited by 37 publications

References 16 publications

Preparation and Characterization of Polyvinyl Alcohol-Based Composite Reinforced with Nanocellulose and Nanosilica

Preparation and Characterization of Polyvinyl Alcohol-Based Composite Reinforced with Nanocellulose and Nanosilica

Characterisation of mechanical and thermal properties in flax fabric reinforced geopolymer composites

Structure and Mechanical Properties of Thermoplastic Composites Using Microcrystalline Cellulose Nanofibers

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