Eco‐friendly thermal insulation material from cellulose nanofibre

Abstract

Nano cellulose is a material of current interest that has attracted considerable attention from researchers due to its interesting properties such as low toxicity, availability, natural abundance, biodegradability, and flexible surface chemistry. Cellulose fiber, usually derived from wood, plant walls or cotton is an eco-friendly thermal insulation material. The cellulose nanofibers (CNFs) described in this work were derived from cotton via sulfuric acid hydrolysis followed by ultrasonication. The formation of CNF and its morphology were analyzed using Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The thermooptic parameters of the prepared sample, which to the author's knowledge has not been reported so far, were studied by the dual beam mode-matched thermal lens technique. Thermal diffusivity (2.61 × 10 −8 m 2 /s) and thermal conductivity (0.108 W/mK) values of the prepared CNFs clearly point to the application potential of the material.

Effect of temperature and frequency on the dielectric properties of cellulose nanofibers from cotton

“…It is fragrance-free, decomposable, less toxic, hydrophilic, and can be extracted in nanofibrous form from plants, animals, or bacteria [3][4][5]. The term nanocellulose, in general, refers to the extracts of cellulose or processed materials, possessing nano-scale structural aspects [6]. It can be categorized based on aspects such as shape, size, or structure.…”

“…Classification of nanocellulose leads to three types: (i) microfibrillated cellulose (CMF) or nanofibrillated cellulose (CNF); (ii) nanocrystalline cellulose (NCC) or cellulose nanocrystal (CNC); and (iii) bacterially produced cellulose or bacterial cellulose (BC) [7,8]. Amongst these categories, CNF has gained considerable attention due to its low thermal conductivity (0.108 W/mK), low thermal expansion coefficient (12-28.5 ppm K -1 ), high mechanical strength (200-400 MPa), Young's modulus (7.4-14 GPa), a semi-crystalline structure composed of extended cellulose chains, large flexibility, ability to synchronize with cellulosic fibers over hydrogen bonding, and its tendency to form strong networks [1,6]. Set to be one of the most promising green ingredients of recent eras due to renewability and abundance, CNF could be used as a substitute and eco-friendly medium for dielectric materials, optical devices, sensors, flexible paper batteries, supercapacitors, and transistors [9][10][11][12][13][14].…”

Development of Co–Nb–CeO2 Catalyst for Hydrogen Production from Waste-Derived Synthesis Gas Using Techno-Economic and Environmental Assessment

“…Among the prepared catalysts, Co–NC exhibited the largest BET surface area. A higher BET surface area improves the mass transfer rate of reactants and products . Therefore, it is expected that Co–NC and Cu–NC catalysts show a higher performance than Fe–NC and Zn–NC catalysts.…”

“…The Co–NC–CP catalyst showed the highest BET surface area. It is expected that this catalyst has improved mass transfer . The Co–NC–SG catalysts showed a very low BET surface area.…”

“…22,61,99 Catalytic Properties of Co−NC Catalysts. 79 The Co−NC−SG catalysts showed a very low BET surface area. It is reported that the SG method using citrate yields a low BET surface area.…”