scholarly journals Focus on Gradientwise Control of the Surface Acetylation of Cellulose Nanocrystals to Optimize Mechanical Reinforcement for Hydrophobic Polyester-Based Nanocomposites

ACS Omega ◽  
2017 ◽  
Vol 2 (8) ◽  
pp. 4725-4736 ◽  
Author(s):  
Lin Gan ◽  
Jinglu Liao ◽  
Ning Lin ◽  
Chenglong Hu ◽  
Hualin Wang ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Mechanical Reinforcement ◽  
Surface Acetylation

Preparation and Viscoelastic Properties of Waterborne Polyurethane/Cellulose Nanocrystals Composites

2013 ◽  
Vol 771 ◽  
pp. 105-108 ◽  
Author(s):  
Qun Zhao ◽  
Ke Lu Yan
Keyword(s):  
Cellulose Nanocrystals ◽  
Viscoelastic Properties ◽  
Loss Modulus ◽  
Casting Process ◽  
Waterborne Polyurethane ◽  
Mechanical Analysis ◽  
Nanocomposite Films ◽  
Ultrasonic Dispersion ◽  
Mechanical Reinforcement ◽  
Power Law Equation

The objective of this work is to study the viscoelastic properties by which nanofillers produce mechanical reinforcement in polymers using dynamic mechanical analysis (DMA). To this purpose, waterborne polyurethane (WBPU) and cellulose nanocrystals (CNCs) composites films with various filler contents were prepared by ultrasonic dispersion followed by emulsion casting process. In frequency sweep tests, the storage modulus and loss modulus were recorded and modeled by the Power Law equation. CNCs precipitation significantly increased the steady state viscous properties of cellulose nanocoposite films but decreased the dynamic viscoelastic properties and frequency sensitivity of nanocomposite films.

scholarly journals Plasma surface-modification of cellulose nanocrystals: a green alternative towards mechanical reinforcement of ABS

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17417-17424 ◽  
Author(s):  
Andrés Alanis ◽  
Josué Hernández Valdés ◽  
Neira-Velázquez María Guadalupe ◽  
Ricardo Lopez ◽  
Ricardo Mendoza ◽  
...  
Keyword(s):  
Surface Modification ◽  
Cellulose Nanocrystals ◽  
Mechanical Reinforcement ◽  
Plasma Surface Modification ◽  
Plasma Surface

This article deals with the plasma-surface modification of cellulose nanocrystals and their employment as reinforcement additive of ABS.

Tuning the Magnetic Alignment of Cellulose Nanocrystals from Perpendicular to Parallel Using Lepidocrocite Nanoparticles

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Sugam Kumar ◽  
Yulia Trushkina ◽  
Gergely Nagy ◽  
Christina Schütz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cellulose Nanocrystals ◽  
Small Angle Neutron Scattering ◽  
Lower Amount ◽  
Magnetic Alignment ◽  
Polarized Optical Microscopy ◽  
Parallel Orientation ◽  
Weak Magnetic Fields

The magnetic alignment of cellulose nanocrystals (CNC) and lepidocrocite nanorods (LpN), pristine and in hybrid suspensions has been investigated using contrast-matched small-angle neutron scattering (SANS) under in situ magnetic fields (0 – 6.8 T) and polarized optical microscopy. The pristine CNC (diamagnetic) and pristine LpN (paramagnetic) align perpendicular and parallel to the direction of field, respectively. The alignment of both the nanoparticles in their hybrid suspensions depends on the relative amount of the two components (CNC and LpN) and strength of the applied magnetic field. In the presence of 10 wt% LpN and fields < 1.0 T, the CNC align parallel to the field. In the hybrid containing lower amount of LpN (1 wt%), the ordering of CNC is partially frustrated in all range of magnetic field. At the same time, the LpN shows both perpendicular and parallel orientation, in the presence of CNC. This study highlights that the natural perpendicular ordering of CNC can be switched to parallel by weak magnetic fields and the incorporation of paramagnetic nanoparticle as LpN, as well it gives a method to influence the orientation of LpN.<br>

Applications of Cellulose Nanocrystals: A Review

2018 ◽  
Author(s):  
Shaoqu Xie ◽  
◽  
Xiao Zhang ◽  
Michael P. Walcott ◽  
Hongfei Lin ◽  
...  
Keyword(s):  
Cellulose Nanocrystals
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