Microfluidizer Technique for Improving Microfiber Properties Incorporated Into Edible and Biodegradable Films

Moura, Márcia R. de; Azeredo, Henriette Monteiro Cordeiro de; Mattoso, L. H. C.

doi:10.5772/38922

Cited by 6 publications

(3 citation statements)

References 61 publications

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“…CS films are promising candidates for future bio‐based materials, because they are made up off or come from naturally abundant bioentities that are readily biodegradable. However, promising such as CS films and the use of edible and biodegradable polymers has been limited because of the problems associated with their performance such as brittleness, poor gas, and moisture barrier properties [ 8]. At this point, it is important to point out that nanocomposite technology has already proven to be a good way to improve these properties significantly.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of chitosan/montmorillonite‐K10 nanocomposites films for food packaging applications

2012

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Chitosan (CS)/montmorillonite‐K10 (MMTK‐10) clay composite films with different amounts of the clay MMTK‐10 (0.5, 1, 2.5, and 5%) were prepared using a solution‐casting method, and their properties were determined. The objective of this study is to prepare CS/clay nanocomposites and then to investigate the effects of clay content on mechanical, barrier, and thermal properties of these nanocomposites. The prepared films were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction analysis, transmission electron microscopy, and scanning electron microscopy. Barrier properties (oxygen and water permeability), mechanical properties (tensile strength and elongation), and thermal behaviors (thermogravimetric analysis) were investigated and compared. The water vapor and gas permeability values of the composite films decreased significantly with increasing filler concentration. Tensile strength of the composites increased significantly with the addition of clay, and elongation at break decreased with increasing clay concentration. The tensile strength of nanocomposites is up to 34.82 MPa for 5 wt% clay content, and the tensile modulus shows a 74.63% higher value than that of neat CS. The resulting films had an opaque appearance, which depended on the amount of MMTK‐10 added. The oxygen permeability decreased with the increase in MMTK‐10. The minimum oxygen permeability (1.54 cm3/m2 day atm) was recorded for film with 5% MMTK‐10. The water permeability of the composite films decreased significantly between 13 and 22% when clay was added. The dispersed clay improves the thermal stability and enhances the hardness and elastic modulus of the matrix systematically with the increased loading of clay. POLYM. COMPOS., 33:1874–1882, 2012. © 2012 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of chitosan/montmorillonite‐K10 nanocomposites films for food packaging applications

2012

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“…Nowadays, the high-pressure microfluidizer approach is incessantly being applied to various technologies for miniaturization from macrostructure to nano-dimensions [75,76]. HPM is categorized into (a) two-step single-channel microfluidization and (b) one-step dual-channel microfluidization [77].…”

Section: High-pressure Microfluidizer (Hpm)mentioning

confidence: 99%

Recent Advances in Cellulose Nanofibers Preparation through Energy-Efficient Approaches: A Review

et al. 2021

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Cellulose nanofibers (CNFs) and their applications have recently gained significant attention due to the attractive and unique combination of their properties including excellent mechanical properties, surface chemistry, biocompatibility, and most importantly, their abundance from sustainable and renewable resources. Although there are some commercial production plants, mostly in developed countries, the optimum CNF production is still restricted due to the expensive initial investment, high mechanical energy demand, and high relevant production cost. This paper discusses the development of the current trend and most applied methods to introduce energy-efficient approaches for the preparation of CNFs. The production of cost-effective CNFs represents a critical step for introducing bio-based materials to industrial markets and provides a platform for the development of novel high value applications. The key factor remains within the process and feedstock optimization of the production conditions to achieve high yields and quality with consistent production aimed at cost effective CNFs from different feedstock.

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“…Such disintegration results from remarkably high shear and impact forces, because the suspension stream passes at high speed within the walls of microchannels and collides with itself. 13 Although this strategy has already been reported by our group, 11,14 this article aims at an in-depth investigation of the real effect of high-pressure microfluidization on the molecular aspects of cellulose fibers. This systematic study sheds light on the real role played by these fillers on the properties of allcellulose composites and also uses a surface response methodology to elucidate the optimum microfluidization conditions from the mechanical performance standpoint.…”

Section: ■ Introductionmentioning

confidence: 99%

High-Pressure Microfluidization as a Green Tool for Optimizing the Mechanical Performance of All-Cellulose Composites

Otoni

Carvalho²,

Cardoso

et al. 2018

ACS Sustainable Chem. Eng.

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We herein report the production of environmentally inspired all-cellulose composites in response to the ever-growing concern on the extensive usage of nonbiodegradable materials derived from nonrenewable resources. Hydroxypropyl methylcellulose (HPMC) was used as a film-forming matrix, while microcrystalline cellulose (MCC) was added as a reinforcement filler. Because the efficiency of fillers in transferring mechanical strength to polymer matrixes relies upon the dispersion level of the former within the latter, this contribution set out to improve the homogeneity of the composite films through a green, solvent-free approach. Indeed, as-received MCC actually decreased the tensile strength, Young’s modulus, and elongation at break of HPMC films in ca. 80%, 33%, and 90%, respectively. High-pressure microfluidization was demonstrated to break MCC particles down, not to play a role on cellulose crystallinity, and to expose surface groups and/or create mechanoradicals, as suggested by a combination of spectroscopic, structural, morphological, and rheological techniques, capable of interacting with HPMC and increasing MCC colloidal stability, thus lessening particle aggregation and improving its dispersion within film matrix. A central composite design guided the optimization of the filler–matrix interaction, which presented a quadratic behavior; that is, overprocessing led to impaired mechanical properties. Seven cycles was the most cost-effective processing condition leading to the strongest, stiffest composites. This study sheds light on the effect of high-pressure microfluidization on cellulosic particles and on the impact of these in all-cellulose composites.

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Microfluidizer Technique for Improving Microfiber Properties Incorporated Into Edible and Biodegradable Films

Cited by 6 publications

References 61 publications

Preparation and characterization of chitosan/montmorillonite‐K10 nanocomposites films for food packaging applications

Preparation and characterization of chitosan/montmorillonite‐K10 nanocomposites films for food packaging applications

Recent Advances in Cellulose Nanofibers Preparation through Energy-Efficient Approaches: A Review

High-Pressure Microfluidization as a Green Tool for Optimizing the Mechanical Performance of All-Cellulose Composites

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