Cellulose nanofibers from bamboo and their nanocomposites with polyvinyl alcohol: Preparation and characterization

2016 ◽  
Vol 39 (8) ◽  
pp. 2611-2619 ◽  
Author(s):  
Shenjie Han ◽  
Qiufang Yao ◽  
Chunde Jin ◽  
Bitao Fan ◽  
Huanhuan Zheng ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Cellulose Nanofibers

scholarly journals Green Nanocomposites Made With Polyvinyl Alcohol And Cellulose Nanofibers Isolated From Recycled Paper

2019 ◽  
Vol 7 (7) ◽  
pp. 621-629 ◽  
Author(s):  
Le Van Hai ◽  
Lindong Zhai ◽  
Hyun Chan Kim ◽  
Jung Woong Kim ◽  
Jaehwan Kim
Keyword(s):  
Polyvinyl Alcohol ◽  
Cellulose Nanofibers ◽  
Recycled Paper

scholarly journals Anisotropic Cellulose Nanofibers/Polyvinyl Alcohol/Graphene Aerogels Fabricated by Directional Freeze-drying as Effective Oil Adsorbents

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 712 ◽  
Author(s):  
Lijie Zhou ◽  
Shengcheng Zhai ◽  
Yiming Chen ◽  
Zhaoyang Xu
Keyword(s):  
Polyvinyl Alcohol ◽  
Freeze Drying ◽  
High Efficiency ◽  
Cellulose Nanofibers ◽  
High Strength ◽  
Dip Coating ◽  
High Porosity ◽  
Water Contact ◽  
Water Separation ◽  
Composite Aerogel

Under the current situation of frequent oil spills, the development of green and recyclable high-efficiency oil-absorbing aerogel materials has attracted wide attention from researchers. In this study, we report a high-strength, three-dimensional hydrophobic cellulose nanofiber (CNF)/polyvinyl alcohol (PVA)/graphene oxide (GO) composite aerogel with an anisotropic porous structure, which was fabricated by directional freeze-drying technology using anisotropically grown ice crystals as a template, followed by hydrophobic treatment with a simple dip coating process. The prepared composite aerogel presented anisotropic multi-level pore microstructures, low density (17.95 mg/cm3) and high porosity (98.8%), good hydrophobicity (water contact angle of 142°) and great adsorption capacity (oil absorption reaching 96 times its own weight). More importantly, the oriented aerogel had high strength, whose compressive stress at 80% strain reached 0.22 MPa and could bear more than 22,123 times its own weight without deformation. Therefore, the CNF/PVA/GO composite aerogel prepared by a simple and easy-to-operate directional freeze-drying method is a promising absorbent for oil-water separation.

scholarly journals Novel Cellulose Nanofibers/Polyvinyl Alcohol/Polyethyleneimine Nanoparticle for Cu2+ Removal in Water

2021 ◽  
Author(s):  
Rongrong Si ◽  
Chaojun Wu ◽  
Dongmei Yu ◽  
Qijun Ding ◽  
Ronggang Li
Keyword(s):  
Polyvinyl Alcohol ◽  
Freeze Drying ◽  
Removal Rate ◽  
Cellulose Nanofibers ◽  
Drying Method ◽  
Order Model ◽  
Bending Vibration ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Structurally Stable

Abstract In this study, environmentally friendly CNF/PVA/PEI nanoparticle was obtained by assembling PEI (polyethyleneimine) into CNF/PVA aerogels, which were prepared by freeze-drying method with the help of glutaraldehyde. FTIR results showed that PEI likely assembled into the CNF/PVA aerogel due to appearances of bending vibration of the CNF/PVA/PEI nanoparticle at 1615cm− 1. BET results further demonstrated that PEI have successfully assembled into aerogel since the specific surface area (22.93m2/g) of CNF/PVA/PEI nanoparticle was lower than that (56.37m2/g) of CNF/PVA aerogel. SEM results also showed that PEI could obviously regulate the morphology of CNF/PVA aerogel. TGA indicated that CNF/PVA/PEI nanoparticle was structurally stable at 216.4°C. The adsorption kinetics of the CNF/PVA/PEI nanoparticle for Cu2+ removal presented good correlations with the Pseudo-second-order model. The adsorption and desorption results showed that the removal rate of 2g/L CNF/PVA/PEI nanoparticle for Cu2+in water could reach more than 93% when the concentration of Cu2+ ranged from 20 to 80mg/L in one hour, and it could still retain more than 80% after 3 cycles.

scholarly journals Effect of Cellulose Nanofibers (CNF) as Reinforcement in Polyvinyl Alcohol/CNF Biocomposite

2021 ◽  
Vol 2129 (1) ◽  
pp. 012057
Author(s):  
Rathesh Kumaran Ulaganathan ◽  
Nur Aiman Mohamad Senusi ◽  
An’Amt Mohamed Noor ◽  
Wan Nazwanie Wan Abdullah ◽  
Mohamad Asyraf Mohd Amin ◽  
...  
Keyword(s):  
Thin Film ◽  
Polyvinyl Alcohol ◽  
Physical Properties ◽  
Food Packaging ◽  
Cellulose Nanofibers ◽  
Packaging Material ◽  
Suitable Candidate ◽  
Tyndall Effect ◽  
Mechanical And Physical Properties ◽  
Milling Method

Abstract This research was targeted to use the planetary ball milling method to extract cellulose nanofibers (CNFs) from commercial microcrystalline cellulose and also to utilize the obtained extracted cellulose nanofibers (CNFs) as reinforcement in polyvinyl alcohol (PVA) thin film. The effect of cellulose nanofibers (CNFs) on the mechanical and physical properties of polyvinyl alcohol (PVA) thin films was investigated. As a result of the study, we found that the thin film’s tensile strength is good, and the surface morphology of the CNFs suspension enhances the bonding between the PVA and the reinforcement. Tyndall effect was accurate with the visible light scattering through CNF suspension, and the CNF/PVA thin film exhibited transparent thin film. In contrast, the CNF/PVA composite’s mechanical and physical properties are good due to the excellent dispersion and absence of agglomeration of CNFs. The prepared PVA/CNF biocomposite would be a suitable candidate to be implemented as biodegradable food packaging material.

scholarly journals Production of cellulose nanofibers from Alfa grass and application as reinforcement for polyvinyl alcohol

2018 ◽  
Vol 47 (7) ◽  
pp. 297-305 ◽  
Author(s):  
Salma Ben Cheikh ◽  
Ridha Ben Cheikh ◽  
Eunice Cunha ◽  
Paulo E. Lopes ◽  
Maria C. Paiva
Keyword(s):  
Polyvinyl Alcohol ◽  
Cellulose Nanofibers

scholarly journals Mechanical, Thermal, and Morphological Properties of Nanocomposites Based on Polyvinyl Alcohol and Cellulose Nanofiber fromAloe veraRind

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Adel Ramezani Kakroodi ◽  
Shuna Cheng ◽  
Mohini Sain ◽  
Abdullah Asiri
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Alcohol ◽  
Elevated Temperatures ◽  
Aqueous Suspension ◽  
Cellulose Nanofibers ◽  
Aloe Vera ◽  
Tensile Modulus ◽  
Mechanical Analysis ◽  
Cellulose Nanofiber ◽  
Morphological Properties

This work was devoted to reinforcement of polyvinyl alcohol (PVA) using cellulose nanofibers fromAloe verarind. Nanofibers were isolated fromAloe verarind in the form of an aqueous suspension using chemimechanical technique. Mechanical characterizations showed that incorporation of even small amounts of nanofibers (as low as 2% by weight) had significant effects on both the modulus and strength of PVA. Tensile modulus and strength of PVA increased, 32 and 63%, respectively, after adding 2% of cellulose nanofiber fromAloe verarind. Samples with higher concentrations of nanofibers also showed improved mechanical properties due to a high level of interfacial adhesion and also dispersion of fibers. The results showed that inclusion of nanofibers decreased deformability of PVA significantly. Dynamic mechanical analysis revealed that, at elevated temperatures, improvement of mechanical properties due to the presence of nanofibers was even more noticeable. Addition of nanofibers resulted in increased thermal stability of PVA in thermogravimetric analysis due to the reduction in mobility of matrix molecules. Morphological observations showed no signs of agglomeration of fibers even in composites with high cellulose nanofiber contents. Inclusion of nanofibers was shown to increase the density of composites.

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