Preparation, characterization of nano ZnO-blended cellulose acetate-polyurethane membrane for photocatalytic degradation of dyes from water

Rajeswari, A.; Vismaiya, S.; Pius, Anitha

doi:10.1016/j.cej.2016.10.124

Cited by 170 publications

(54 citation statements)

References 28 publications

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“…The introduction of nanomaterials is a broad modification method that can significantly improve the performance of WPU . Nanocellulose as a renewable, biodegradable, biocompatible, organic‐based nanomaterial with a wide range of sources, a series of studies have been carried out in the field of modified polymers .…”

Section: Introductionmentioning

confidence: 99%

Modified cellulose nanocrystals enhancement to mechanical properties and water resistance of vegetable oil‐based waterborne polyurethane

Zhang

Fan

et al. 2019

J of Applied Polymer Sci

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Environmentally friendly and lightweight silylated cellulose nanocrystal (SCNCs)/waterborne polyurethane (WPU) composite films that exhibit excellent mechanical properties and water resistance were prepared. The cellulose nanocrystals (CNCs) of the filamentous structure were surface-modified by γ-aminopropyltriethoxysilane (APTES) and then introduced into a castor oil-based aqueous polyurethane (WPU) matrix by in situ polymerization. The morphology and silylation degree of CNCs were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Fourier infrared transform spectroscopy at different APTES concentrations. The results showed that the surface of the nanocellulose crystal has the best silylation morphology and thermal stability with incorporation of 6 wt % APTES. The thermal stability, mechanical properties, surface morphology, and water resistance of the nanocomposites were investigated by TGA, tensile test, SEM and optical contact angle, water absorption test, and mechanical property test after immersed in water. It was found that the effective introduction of modified CNCs resulted in a significant increase in tensile strength at high levels, and the thermal stability and hydrophobicity of the material were improved simultaneously, reaching the percolation threshold at a 0.50 wt % SCNCs as determined theoretically. This study provided an approach to the design and development of surface-modified CNCs/vegetable oil-based polymer composites by using an appropriate concentration of silane coupling agent to modify CNCs and improve the compatibility between nanocellulose and vegetable oil-based polymer matrices.

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Section: Introductionmentioning

confidence: 99%

Modified cellulose nanocrystals enhancement to mechanical properties and water resistance of vegetable oil‐based waterborne polyurethane

Zhang

Fan

et al. 2019

J of Applied Polymer Sci

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“…Image in SEM is produced due to combination of in elastically scattered secondary electrons and elastically backscattered electrons. Due to deep penetration of electron beam (backscattered electrons) gives valuable information about composition of specimen whereas secondary electrons being sensitive to topographic areas give information about membrane surface [212]. To get information about top layer and cross sectional parts (for membrane thickness), analysis of membrane is done through secondary and back scattered electrons.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Zahid¹,

Rashid²,

Akram³

et al. 2018

J Membr Sci Technol

188

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During last few decades, membrane technology has emerged as an efficient technique over conventional methods due to its high removal capacity, ease in operation and cost effectiveness for wastewater treatment and production of clean water. Membrane based separations are commonly based on polymeric membranes because of their higher flexibility, easily pore forming mechanism, low cost and smaller space for installation as compared to inorganic membranes. Commonly employed membrane fabrication phase inversion method has been shortly reviewed in this article. Major limitation of membrane based separations is fouling and polymeric membranes being hydrophobic in nature are more prone to fouling. Fouling is a deposition of various colloidal particles, macromolecules (polysaccharides, proteins), salts etc. on membrane surface and within pores thus impedes membrane performance, reduces flux and results in high cost. Modification of polymeric membranes due to its tailoring ability with nanomaterials such as metal based and carbon based results in polymeric nano-composite membranes with high antifouling characteristics. Nanomaterials impart high selectivity, permeability, hydrophilicity, thermal stability, mechanical strength, and antibacterial properties to polymeric membranes via blending, coating etc. modification methods. Characterization techniques has also discussed in later section for studying morphological properties and performance of polymer nano-composite membranes. Graphical Abstract

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“…These characteristics make the compounds become more stable and can remain in the environment for an extended period which is difficult to degrade. Besides that, it also increases the chemical oxygen demand (COD) concentration, a large amount of the suspended solid, fluctuating of the pH, strong colour, toxic and high temperature that harm the aquatic life which have been proven in many research studies [2].…”

Section: Introductionmentioning

confidence: 99%

Preparation of activated carbon from tamarind seeds and Methylene blue (MB) removal

Jamion¹,

Hashim²

2018

J. Fundam and Appl Sci.

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In this study, thedye treatment which is methylene blue ascertained with the activated carbon that prepared from the tamarind seed (Tamarindusindica). The conditions used to prepare activated carbon, using phosphoric acid as an activating agent at temperature 500 conditions may be attributed to enhance the surface area and pores development of TSC.Single point BET surface area (S and FESEM analysis showed that the pores development and formation were mostly in circle and oval pattern. The best conditions for TSC sample to adsorb MB effectively were at 50 mL of MB with concentration 120 ppm at temperature, 323 K by u maximum adsorption capacity for MB dye solution was 102.77 mg g In this study, thedye treatment which is methylene blue (MB) as water pollutants the activated carbon that prepared from the tamarind seed ). The conditions used to prepare activated carbon, (TSC) were activat using phosphoric acid as an activating agent at temperature 500 o C for four hours. These conditions may be attributed to enhance the surface area and pores development of TSC.Single point BET surface area (S BET ) analysis gave the surface area of TSC was and FESEM analysis showed that the pores development and formation were mostly in circle and oval pattern. The best conditions for TSC sample to adsorb MB effectively were at 50 mL of MB with concentration 120 ppm at temperature, 323 K by using 0.04 g of TSC. The maximum adsorption capacity for MB dye solution was 102.77 mg g -1 .; methylene blue; adsorption; phosphoric acid.

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Preparation, characterization of nano ZnO-blended cellulose acetate-polyurethane membrane for photocatalytic degradation of dyes from water

Cited by 170 publications

References 28 publications

Modified cellulose nanocrystals enhancement to mechanical properties and water resistance of vegetable oil‐based waterborne polyurethane

Modified cellulose nanocrystals enhancement to mechanical properties and water resistance of vegetable oil‐based waterborne polyurethane

A Comprehensive Review on Polymeric Nano-Composite Membranes for Water Treatment

Preparation of activated carbon from tamarind seeds and Methylene blue (MB) removal

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