scholarly journals Surface Modification of Cellulose Nanocrystals with Lactone Monomers via Plasma-Induced Polymerization and Their Application in ABS Nanocomposites

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2699
Author(s):  
Ramón Díaz de León ◽  
Ediberto Guzmán ◽  
Ricardo López González ◽  
Alejandro Díaz Elizondo ◽  
Ilse Magaña ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Yield Stress ◽  
Cellulose Nanocrystals ◽  
Polymeric Materials ◽  
Environmental Problems ◽  
Plasma Power ◽  
Polymeric Matrices ◽  
Promising Application ◽  
Modified Cellulose

The growing concern for environmental problems has motivated the use of materials obtained from bio-based resources such as cellulose nanocrystals which have a promising application acting as fillers or reinforcements of polymeric materials. In this context, in this article, plasma-induced polymerization is proposed as a strategy to modify nanocrystals at different plasma power intensities using ε-caprolactone and δ-decalactone to improve their compatibility with polymeric matrices. The characterization was carried out using techniques such as FTIR, TGA, XRD, XPS, and AFM, with which a successful functionalization was demonstrated without altering the inherent properties of the nanocrystals. The preparation of ABS nanocomposites was carried out with the modified nanoparticles and the evaluation of the mechanical properties indicates an increase in Young’s modulus and yield stress under certain concentrations of modified cellulose nanocrystals.

scholarly journals Mechanical and Optical Properties of Polylactic Acid Films Containing Surfactant-Modified Cellulose Nanocrystals

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Jose Luis Orellana ◽  
Derek Wichhart ◽  
Christopher L. Kitchens
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Optical Properties ◽  
Polylactic Acid ◽  
Cellulose Nanocrystals ◽  
Cetyltrimethylammonium Bromide ◽  
Polymeric Matrices ◽  
Nanoscale Structure ◽  
Surface Modified ◽  
Modified Cellulose

The addition of surface-modified cellulose nanocrystals (CNCs) to polymeric matrices can lead to an enhancement of the mechanical and optical properties of host polymers. The use of surfactants can provide an easy and effective way to change the CNC functionality and to evaluate the effects of surface chemistry in the reinforcement mechanisms. In this work, CNCs were solution blended with polylactic acid (PLA) and melt extruded into films. The PLA toughness increased from 1.70 MJ/m3to 2.74 MJ/m3, a 61% increase, with the addition of 1% of decylamine-modified CNCs without a decrease of the tensile strength or modulus. In this work, we investigated the use of two surfactants, decylamine and cetyltrimethylammonium bromide, to enhance CNC compatibility with the hydrophobic PLA matrix. Decylamine at 1.0 wt.% with respect to CNC loading was found to significantly enhance CNC compatibility and property enhancement. The low concentration of surfactant is notable, as other works typically use significantly higher loadings for CNC incorporation and property enhancement. At high CNC concentrations, mechanical properties decreased but the aligned assembly of the CNCs provided intricate colors to the films when observed between crossed polars. The alignment and nanoscale structure of CNCs within the films play an important role in the properties obtained.

Properties Enhancement of Polymer/Ceramic Nanocomposites

2017 ◽  
pp. 99-121
Author(s):  
Noureddine Ramdani ◽  
Mehdi Azibi
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Scientific Literature ◽  
Thermal And Mechanical Properties ◽  
Polymeric Matrices ◽  
Ceramic Nanoparticles ◽  
Optical And Mechanical Properties ◽  
Ceramic Nanocomposites

This chapter reviews the various properties enhancement of polymer/ceramic nanocomposites. Ceramics nanofillers have attracted both academic and industrial interest as they can produce a significant improvement in the properties of polymers even at lower filler loadings. Recently, numerous kinds of polymeric matrices reinforced with ceramic nanoparticles have been reported. The surface-modification of ceramic nanoparticles was reported to provide extra-improvements in the thermal and mechanical properties of these materials. In addition, the type of the used ceramic nanofillers agent determines the final properties of the nanocomposites. Herein, the various effects of adding ceramic nanoparticles on the thermal, electrical, optical, and mechanical properties of polymer/ceramic nanocomposites as well as the reinforcing mechanism are discussed in general along with detailed examples drawn from the scientific literature.

scholarly journals Graphene-based polymeric nano-composites: an introspection into functionalization, processing techniques and biomedical applications

2019 ◽  
Vol 9 (3) ◽  
pp. 3926-3933 ◽  
Keyword(s):  
Mechanical Properties ◽  
Biomedical Applications ◽  
Scientific Community ◽  
Polymeric Materials ◽  
Biomedical Domain ◽  
Polymeric Nanocomposites ◽  
Polymeric Matrices ◽  
Functional Capabilities ◽  
Superior Mechanical Properties ◽  
Processing Techniques

Although, there have been numerous efforts in synthesis of polymers, their mechanical properties have limited their applications. Graphene has been investigated for excellent properties such as superior mechanical properties, high thermal conductivity that has attracted the attention of scientific community to employ graphene as a filler material in polymeric matrices to form composites with multi-functional capabilities. The excellent properties possessed by Graphene has motivated users to fabricate flexible nanocomposites that can be used for applications requiring superior mechanical, chemical and thermal performances. Characteristics of both the components if explored synergistically through proper structural and interfacial organization. The investigation in this direction has resulted into combination of graphene with variety of polymeric materials and hence the development of different graphene-based nanocomposites. The present work reviews the application of graphene-based nanocomposites in the biomedical domain. With this objective, the polymeric matrices suitable for biomedical applications as well as the techniques of producing graphene polymeric nanocomposites have been discussed. Finally the application particularly in biosensing, wound healing and drug delivery system has been discussed.

scholarly journals Cellulose Nanocrystals: Production, Functionalization and Advanced Applications

2019 ◽  
Vol 58 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Lachlan Thompson ◽  
Jalal Azadmanjiri ◽  
Mostafa Nikzad ◽  
Igor Sbarski ◽  
James Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Composite Materials ◽  
Cellulose Nanocrystals ◽  
Recent Progress ◽  
Review Paper ◽  
Hydrophobic Polymer ◽  
Reinforcing Agent ◽  
Different Sources ◽  
Advanced Applications

Abstract Cellulose nanocrystals (CNC) are a class of nanoscale biopolymers produced from cellulose sources. CNC materials have gained growing interests which can be attributed to their excellent properties such as excellent biocompatibility, good mechanical properties and high aspect ratio whilst also being an inexpensive material that can be produced from green and renewable sources. Due to the abundant hydroxyl functional groups, the surface of CNC materials are ready to be tuned and functionalized via chemical reactions allowing for many different applications, such as being a reinforcing agent to be incorporated into a hydrophobic polymer matrix. In this review paper,we firstly introduce the general methods for producing CNC from different sources. Different strategies used for surface modification ofCNCare then discussed. Finally, the recent progress on the applications of CNC and CNC composite materials are described in detail.

Properties Enhancement of Polymer/Ceramic Nanocomposites

2021 ◽  
pp. 613-635
Author(s):  
Noureddine Ramdani ◽  
Mehdi Azibi
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Scientific Literature ◽  
Thermal And Mechanical Properties ◽  
Polymeric Matrices ◽  
Ceramic Nanoparticles ◽  
Optical And Mechanical Properties ◽  
Ceramic Nanocomposites

This chapter reviews the various properties enhancement of polymer/ceramic nanocomposites. Ceramics nanofillers have attracted both academic and industrial interest as they can produce a significant improvement in the properties of polymers even at lower filler loadings. Recently, numerous kinds of polymeric matrices reinforced with ceramic nanoparticles have been reported. The surface-modification of ceramic nanoparticles was reported to provide extra-improvements in the thermal and mechanical properties of these materials. In addition, the type of the used ceramic nanofillers agent determines the final properties of the nanocomposites. Herein, the various effects of adding ceramic nanoparticles on the thermal, electrical, optical, and mechanical properties of polymer/ceramic nanocomposites as well as the reinforcing mechanism are discussed in general along with detailed examples drawn from the scientific literature.

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