Tensile strength and disintegration of tableted silicified microcrystalline cellulose: Influences of interparticle bonding

2003 ◽  
Vol 92 (7) ◽  
pp. 1489-1501 ◽  
Author(s):  
Kyriakos Kachrimanis ◽  
Ioannis Nikolakakis ◽  
Stavros Malamataris
Keyword(s):  
Tensile Strength ◽  
Microcrystalline Cellulose ◽  
Interparticle Bonding

Effect of Microcrystalline Cellulose from Banana Stem Fiber on Mechanical Properties and Crystallinity of PLA Composite Films

2011 ◽  
Vol 695 ◽  
pp. 170-173 ◽  
Author(s):  
Voravadee Suchaiya ◽  
Duangdao Aht-Ong
Keyword(s):  
Tensile Strength ◽  
Young’S Modulus ◽  
Microcrystalline Cellulose ◽  
Young's Modulus ◽  
Agricultural Waste ◽  
Composite Films ◽  
Sem Image ◽  
Biocomposite Films ◽  
Twin Screw ◽  
Banana Stem

This work focused on the preparation of the biocomposite films of polylactic acid (PLA) reinforced with microcrystalline cellulose (MCC) prepared from agricultural waste, banana stem fiber, and commercial microcrystalline cellulose, Avicel PH 101. Banana stem microcrystalline cellulose (BS MCC) was prepared by three steps, delignification, bleaching, and acid hydrolysis. PLA and two types of MCC were processed using twin screw extruder and fabricated into film by a compression molding. The mechanical and crystalline behaviors of the biocomopsite films were investigated as a function of type and amount of MCC. The tensile strength and Young’s modulus of PLA composites were increased when concentration of MCC increased. Particularly, banana stem (BS MCC) can enhance tensile strength and Young’s modulus of PLA composites than the commercial MCC (Avicel PH 101) because BS MCC had better dispersion in PLA matrix than Avicel PH 101. This result was confirmed by SEM image of fractured surface of PLA composites. In addition, XRD patterns of BS MCC/PLA composites exhibited higher crystalline peak than that of Avicel PH 101/PLA composites

scholarly journals COMPACTION CHARACTERISTICS OF THE POWDER FROM THE SEED COAT OF TINGUI (Magonia pubescens)

2007 ◽  
Vol 29 (68/69) ◽  
Author(s):  
Antonio Zenon Antunes Teixeira
Keyword(s):  
Tensile Strength ◽  
Microcrystalline Cellulose ◽  
Seed Coat ◽  
Brittle Material ◽  
Hydroxypropyl Methylcellulose ◽  
Mechanical Parameters ◽  
Compaction Characteristics ◽  
Strength And Deformation

The aim of this work was to examine the compaction characteristics of the powder from the seed coat of Tingui (Magonia Pubescens) comparing to the materials commonly used in pellet industries. The materials evaluated as comparison included Microcrystalline cellulose (MCC), Silicified microcrystalline cellulose (SMCC), Hydroxypropyl methylcellulose (HPMC), Polyvinil pirrolidone (PVP) and lactose. The mechanical parameters observed were hardness, tensile strength and deformation. The results confirmed that the powder from the seed coat of Tingui were quietly close to lactose as a soft brittle material.

Reinforcing potential of wood pulp-derived microfibres in a PVA matrix

Holzforschung ◽  
2006 ◽  
Vol 60 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Ayan Chakraborty ◽  
Mohin Sain ◽  
Mark Kortschot
Keyword(s):  
Tensile Strength ◽  
Aspect Ratio ◽  
Polyvinyl Alcohol ◽  
Microcrystalline Cellulose ◽  
Comparative Studies ◽  
Kraft Pulp ◽  
Fold Increase ◽  
Minimum Length ◽  
Reinforcing Agent ◽  
Softwood Kraft Pulp

Abstract In this study, the reinforcing potential of cellulose “microfibres” obtained from bleached softwood kraft pulp was demonstrated in a matrix of polyvinyl alcohol (PVA). Microfibres are defined as fibres of cellulose of 0.1–1 μm in diameter, with a corresponding minimum length of 5–50 μm. Films cast with these microfibres in PVA showed a doubling of tensile strength and a 2.5-fold increase in stiffness with 5% microfibre loading. The theoretical stiffness of a microfibre was calculated as 69 GPa. The study also demonstrated that the strength of the composite was greater at 5% microfibre loading compared to 10% loading. Comparative studies with microcrystalline cellulose showed that the minimum aspect ratio of the reinforcing agent is more criticalthan its crystallinity in providing reinforcement in the composite.

Mechanical Properties, Morphology, Thermal Performance, Crystallization Behavior, and Kinetics of PP/Microcrystal Cellulose Composites Compatibilized by Two Different Compatibilizers

2011 ◽  
Vol 24 (6) ◽  
pp. 735-754 ◽  
Author(s):  
Z. Xiuju ◽  
S. Juncai ◽  
Y. Huajun ◽  
L. Zhidan ◽  
T. Shaozao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Flexural Strength ◽  
Crystallization Kinetics ◽  
Thermal Performance ◽  
Microcrystalline Cellulose ◽  
Heterogeneous Nucleation ◽  
Crystallization Temperature ◽  
Nonisothermal Crystallization

Polypropylene (PP)/microcrystalline cellulose (MCC) composites and PP/MCC composites modified by maleic anhydride grafted PP (PP-g-MA) and methyl acrylic acid glycidyl ester grafted PP (PP-g-GMA) respectively were prepared in a twin-screw extruder. The mechanical properties, morphology, and thermal performance were investigated. The nonisothermal crystallization, melting behavior, and nonisothermal crystallization kinetics were investigated by DSC. The results indicated that the addition of MCC had led to the increase of the tensile strength, impact strength, and flexural strength of PP. PP-g-GMA modification was more conducive to the improvement in tensile strength, impact strength, and flexural strength. The three types of PP/MCC composites have higher thermal decomposition temperatures, Vicat softening temperatures, and dimensional stability. Nonisothermal crystallizations of PP/MCC composites were in accordance with tridimensional growth with heterogeneous nucleation. Meanwhile, MCC was acted as the nucleating agent in PP matrix, which increased the crystallization temperature. PP-g-GMA further increased the crystallization temperature while PP-g-MA weakened the heterogeneous nucleation effect of MCC. Avrami equation and Mo method give a satisfactory description of the crystallization kinetics process. The activation energy of crystallization, nucleation constant, and fold surface free energy of PP were markedly reduced in PP/MCC composites and its compatibilized composites. The value of F( T) systematically increased with increasing relative degree of crystallinity. The addition of microcrystalline cellulose has greatly reduced the spherulitic size of PP.

scholarly journals Particle size, compaction characteristic and tablet strength of spray-dried fermented jackfruit pulp - microcrystalline cellulose binary powder mixture

Food Research ◽  
2021 ◽  
Vol 5 (S1) ◽  
pp. 8-13
Author(s):  
N.A. Azman ◽  
S.P. Koh ◽  
F.W. Ahmad Hamidi ◽  
M.S. Anuar ◽  
S.M. Tahir
Keyword(s):  
Particle Size ◽  
Tensile Strength ◽  
Microcrystalline Cellulose ◽  
Powder Mixture ◽  
Powder Mixtures ◽  
Tablet Form ◽  
Tablet Strength ◽  
Binary Powder Mixtures ◽  
Compaction Characteristic ◽  
Spray Dried

The tableting properties for fermented spray dried jackfruit (FJP) and microcrystalline cellulose (MCC) powders were studied. 25% FJP + 75% MCC, 50% FJP + 50% MCC and 75% FJP + 25% MCC binary powder mixtures were compacted into tablet form at various compaction pressures ranging from 15.1 to 73.8 MPa. The properties were compared to pure FJP and MCC tablets. The addition of MCC resulted in a higher particle size and the increased in the plastic work of the tablet. The best ratio of FJP-MCC binary tablet was found to be at 25% FJP + 75% MCC where the tablet showed the highest tensile strength. In conclusion, the addition of MCC to FJP improved the compaction characteristics and the tablet mechanical strength.

scholarly journals Modifications of microcrystalline cellulose (MCC), nanofibrillated cellulose (NFC), and nanocrystalline cellulose (NCC) for antimicrobial and wound healing applications

e-Polymers ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 103-119 ◽  
Author(s):  
Mehran Alavi
Keyword(s):  
Wound Healing ◽  
Tensile Strength ◽  
Microcrystalline Cellulose ◽  
Nanofibrillated Cellulose ◽  
Nanocrystalline Cellulose ◽  
Nano Composites ◽  
Natural Polymer ◽  
Natural Sources ◽  
Nano Cellulose ◽  
Medicinal Properties

AbstractRecently, great attention has been paid to nano-composites of cellulose, due to their unique structure as a most abundant natural polymer with having exceptional properties such as renewable, biodegradable and high specific tensile strength, aspect ratio, and Young’s modulus. Prominent cellulose is naturally present in plant lignocellulosic biomass as a biocomposite made of cellulose, hemi-celluloses, lignin, etc. In addition, it can be extracted from other natural sources including bacteria, algae, and sea animals. Microcrystalline cellulose (MCC), nanocrystalline cellulose (NCC), and nanofibrillated cellulose (NFC) is an emerging renewable nanomaterial that has various applications, such as food, paper production, industrial and pharmaceutical biomaterials. The surface modification on NCC can improves its disperse ability in different solvents and its utilization in protein immobilization, tissue engineering, drug delivery, and inorganic reaction template. Therefore, based on recent studies, this review illustrated considerable progresses with addressing medicinal properties involving antimicrobial and biocompatibility of nano-cellulose (NC) in the case of wound healing.

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