Synthesis of SiO₂ nanoparticle from bamboo leaf and its incorporation in PDMS membrane to enhance its separation properties

Abstract

<jats:title>Abstract</jats:title> <jats:p>A low-cost indigenous silica powder at nano-scale was synthesized by thermal combustion and alkaline extraction technique from bamboo leaf ash. The bamboo leaf ash was prepared by heating the bamboo leaf at 750°C for 5 h. The amorphous SiO<jats:sub>2</jats:sub> nanoparticle with an average particle size of 20 nm was used for the industrial application. The synthesized nanoparticle as a filler was mixed with polydimethylsiloxane (PDMS) polymer solution to synthesize a nanocomposite membrane by a solution casting method. The morphological study was done using high-resolution scanning electron microscopy (HRSEM) with an energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and the chemical structure was studied using Fourier-transform infrared spectrometry (FTIR). Thermogravimetric analysis (TGA) analyzed the thermal stability of the membranes, and the hydrophobicity was measured using contact angle analyzer. Separation of the acetic-water mixture was carried out by nano-composite PDMS membrane to study the effect of silica loading on the PDMS membrane. It was observed that the presence of SiO<jats:sub>2</jats:sub> nanoparticles significantly improves the pervaporation flux as well as the thermal stability.</jats:p>

The Effect of Physiological Incubation on the Properties of Elastic Magnetic Composites for Soft Biomedical Sensors

“…Results presented by Nair et al shows that the PDMS decomposition was completed at about 590 • C, leaving no residue [53]. Sethy et al presents TG analysis for PDMS, where the decomposition process is similar to the one obtained in our study [55]. Moreover, the authors show that the additives enhance the thermal stability of the PDMS matrix, as observed in this experiment as well.…”

Silica nanoparticles as novel sustainable approach for plant growth and crop protection

“…plant as source for Si. (Sethy et al, 2019) used bamboo leaf ash to prepare SiNPs and integrated them into a poly di-methyl siloxane (PDMS) membrane to increase their separation characteristics. The majority of the literature has utilized extracts of plant tissues as a support for the preparation of SiNPs in the alkaline hydrolysis step.…”

PDMS‐silica composite gas separation membranes by direct ink writing

“…38,39 Incorporating SiO 2 particles into the PDMS matrix improved the resulting mixture's thermal stability 40 by absorbing heat, thereby increasing the temperature at which the thermal degradation of the NPDMS commences. 41 Furthermore, the hydrogen bonding between SiO 2 and PDMS facilitates the increase in thermal stability of the membrane. 42 However, such beneficial effects were not significantly observed since the amount of SiO 2 on the DIW-printable NPDMS inks was very low (Figure 4b).…”