scholarly journals Shear melting and recovery of crosslinkable cellulose nanocrystal–polymer gels

Soft Matter ◽  
2019 ◽  
Vol 15 (21) ◽  
pp. 4401-4412 ◽  
Author(s):  
Abhinav Rao ◽  
Thibaut Divoux ◽  
Gareth H. McKinley ◽  
A. John Hart
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Polymer Gels ◽  
Cellulose Nanocrystal ◽  
Flow Conditions ◽  
Chemical Additives ◽  
Distinctive Features ◽  
Composite Gels ◽  
Colloidal Glasses ◽  
Processing Of Composites

Cellulose nanocrystals (CNC) are naturally-derived nanostructures of growing importance for the production of composites having attractive mechanical properties, and improved sustainability. Polymer–CNC composite gels display a number of the distinctive features of colloidal glasses and their response to the flow conditions encountered during processing of composites can be tuned by chemical additives.

Biomimicking the structure of silk fibers via cellulose nanocrystal as β-sheet crystallite

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 14304-14313 ◽  
Author(s):  
Lin Liu ◽  
Xiaogang Yang ◽  
Houyong Yu ◽  
Chao Ma ◽  
Juming Yao
Keyword(s):  
Mechanical Properties ◽  
Silk Fibroin ◽  
Cellulose Nanocrystals ◽  
Cellulose Nanocrystal ◽  
Ordered Structure ◽  
Thermal And Mechanical Properties ◽  
Silk Fibers ◽  
Natural Silk ◽  
Hydrogen Bonding Interactions ◽  
Β Sheet

Biomimic silk fibers with refined crystalline structure were produced via incorporating cellulose nanocrystals into silk fibroin matrix to mimic the β-sheet crystallites in natural silk. The fibers exhibit excellent thermal and mechanical properties, attributed to the strong hydrogen bonding interactions between cellulose nanocrystals and silk fibroin as well as cellulose nanocrystal-induced ordered structure.

Effects of particle sizes, wood to cement ratio and chemical additives on the properties of sesendok (Endospermum Diadenum) cement-bonded particleboard

2010 ◽  
Vol 7 (2) ◽  
pp. 57
Author(s):  
Jamaludin Kasim ◽  
Shaikh Abdul Karim Yamani ◽  
Ahmad Firdaus Mat Hedzir ◽  
Ahmad Syafiq Badrul Hisham ◽  
Mohd Arif Fikri Mohamad Adnan
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Cement Content ◽  
Particle Sizes ◽  
Thickness Swelling ◽  
Chemical Additives ◽  
Board Density ◽  
Cement Ratio ◽  
Aluminium Silicate ◽  
Cement Board

An experimental investigation was performed to evaluate the properties of cement-bonded particleboard made from Sesendok wood. The target board density was set at a standard 1200 kg m". The effect offarticle size, wood to cement ratio and the addition ofsodium silicate and aluminium silicate on the wood cement board properties has been evaluated. A change ofparticle size from 1.0 mm to 2.0 mm has a significant effect on the mechanical properties, however the physical properties deteriorate. Increasing the wood to cement ratio from 1:2.25 to 1:3 decreases the modulus ofrupture (MOR) by 11% and the addition ofsodium silicate improves valuesfurther by about 28% compared to the addition ofaluminum silicate. The modulus ofelasticity (MOE) in general increases with increasing cement content, but is not significantly affected by the addition ofsodium silicate or aluminium silicate, although the addition of their mixture (sodium silicate andaluminium silicate) consistentlyyields greater MOE values. Water absorption and thickness swelling is significantly affected by the inclusion ofadditives and better values are attained using higher wood to cement ratios.

scholarly journals Concentric chiral nematic polymeric fibers from cellulose nanocrystals

2021 ◽  
Author(s):  
Arash Momeni ◽  
Christopher M. Walters ◽  
Yi-Tao Xu ◽  
Wadood Y. Hamad ◽  
Mark J. MacLachlan
Keyword(s):  
Cellulose Nanocrystals ◽  
Liquid Crystalline ◽  
Capillary Tube ◽  
Single Domain ◽  
Cellulose Nanocrystal ◽  
Polymeric Fibers ◽  
Chiral Nematic ◽  
Chiral Nematic Structure ◽  
Crystalline Suspension

A cellulose nanocrystal liquid crystalline suspension was mixed with monomers and confined to a capillary tube. After photopolymerization, a fiber with a single-domain concentric chiral nematic structure throughout the length of the fiber was obtained.

scholarly journals Mechanical properties and degradation studies of poly(mannitol sebacate)/cellulose nanocrystals nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 55879-55891 ◽  
Author(s):  
Águeda Sonseca ◽  
Oscar Sahuquillo ◽  
E. Johan Foster ◽  
Enrique Giménez
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Sebacic Acid ◽  
Temperature Profiles ◽  
Degradation Studies

Two pre-polymers with ad-mannitol : sebacic acid 1 : 1 and 1 : 2 ratios respectively were combined with cellulose nanocrystals (CNCs) and crosslinked applying different time–temperature profiles to obtain PMS/CNC nanocomposites with different properties.

The effect of hydration on the material and mechanical properties of cellulose nanocrystal-alginate composites

2018 ◽  
Vol 179 ◽  
pp. 186-195 ◽  
Author(s):  
Megan Smyth ◽  
Marie-Stella M’Bengue ◽  
Maxime Terrien ◽  
Catherine Picart ◽  
Julien Bras ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystal

scholarly journals MACHINABILITY ANALYSIS OF AN AL-1,2% Pb ALLOY SOLIDIFIED IN A HORIZONTAL DIRECTIONAL DEVICE

2019 ◽  
Vol 16 (31) ◽  
pp. 860-874
Author(s):  
Jacson Malcher NASCIMENTO ◽  
Regiane Socorro BARROS ◽  
Camila Yuri KONNO ◽  
Adrina Paixão SILVA ◽  
Otávio ROCHA ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tool Wear ◽  
Tribological Behavior ◽  
Structural Parameters ◽  
Cutting Temperature ◽  
Industrial Processes ◽  
Unsteady State ◽  
Flow Conditions ◽  
Monotectic Alloy ◽  
Machinability Analysis

In general, the binary monotectic alloys are characterized by the limited solubility in the liquid state, which gives them a benefited tribological behavior such as wear resistance. Researches regarding the development of monotectic alloy microstructures during the unsteady-state heat flow conditions are fundamental, as it encompasses most of the solidification industrial processes. However, the microstructural relationship between the mechanical properties of monotectic alloys is little explored and practically nil. In this context, the present study consists of investigating and correlating solidification thermal variables and structural parameters such as microhardness and machinability (cutting temperatures and tool wear) of Al-1.2wt% Pb alloy, in a horizontal directional device. It was observed that the cutting temperature and tool wear results complement each other when correlated with position and interphase spacing, indicating that for smaller interphase spacings the addition of lead harms machinability.

Rheological and Thermo-Mechanical Properties of Poly(lactic acid)/Lignin-Coated Cellulose Nanocrystal Composites

2017 ◽  
Vol 5 (2) ◽  
pp. 1711-1720 ◽  
Author(s):  
Anju Gupta ◽  
William Simmons ◽  
Gregory T. Schueneman ◽  
Donald Hylton ◽  
Eric A. Mintz
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Cellulose Nanocrystal ◽  
Poly Lactic Acid
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