Red mud reinforced polyvinyl alcohol composite films: synthesis, chemical, mechanical and thermal properties

Abstract

Nowadays biodegradable polymer draws much attention to the researcher compared to the petroleum-based nonbiodegradable polymer due to the environmental and energy crisis. Aluminum industry waste red mud (RM) reinforced with polyvinyl alcohol (PVA) organic-inorganic composite film was synthesized by sol-gel method. The effects of sodium lauryl sulfate (SLS) as a compatibilizer on the composite were investigated. The composites were characterized by UV absorption, Fourier transforms infrared spectrophotometer (FTIR), X-ray diffraction, scanning electron microscopy (SEM), EDX. Chemical, mechanical and thermal properties of the composites were investigated with different amount of red mud-PVA and also the comparison between them without and with SLS addition. Physical and chemical bonding in the PVA, PVA-RM, and PVA-RM-SLS were shown through FTIR spectra. SEM images exhibit excellent compatibility between PVA and RM in the composite. Degree of swelling and tensile strength were increased by 71.48% and 194.88% respectively, and again percentage of elongation at break and solubility were decreased by 98.07% and 78.07% respectively for the PVA-RM-SLS composite compared to virgin PVA. TGA thermogram reveals that PVA-RM-SLS system had more thermal stability than pure PVA. All the results showed excellent adhesion between PVA and red mud and established the effect of RM as filler and SLS as compatibilizer. This composite is suitable as packaging materials.

Poly(vinyl alcohol)/Melamine Composite Containing LATP Nanocrystals as a High-Performing Nanofibrous Membrane Separator for High-Power, High-Voltage Lithium-Ion Batteries

“…The second-stage weight loss in the temperature range of ∼100–380 °C is due to the dehydration reaction on the polymer chains and formation of volatile products. The third-stage weight loss observed in the temperature range of 380–500 °C is due to the degradation or decomposition PVA polymer. , As seen, the PVAM composite membrane exhibits better thermal stability over the pure PVAM nanofiber membrane.…”

“…The third-stage weight loss observed in the temperature range of 380−500 °C is due to the degradation or decomposition PVA polymer. 40,41 As seen, the PVAM composite membrane exhibits better thermal stability over the pure PVAM nanofiber membrane. 1f, the PVAM composite membrane shows a uniform thin nanofiber with a larger number of micropores than the PE separator (Figure 1c).…”

Polyvinyl Alcohol-Based Gel Electrolytes with High Water Content for Flexible Zinc-Air Batteries with High Rate Capability

“…150 °C-160 °C. 35,36 Accordingly, the gels prepared from the precursor solutions with 10% PVA, 15% PVA and 25% PVA contain 90, 88 and 80 wt% water, respectively. After a plateau (between 150 and 250 °C), all samples display the second weight loss from ca.…”

A critical review on tribological properties, thermal behavior, and different applications of industrial waste reinforcement for composites

“…The weight percentage at 600°C was maximum for RM-reinforced composite as compared to others. 106 Recently, the RM was reinforced with CNT for preparing the composite using chemical deposition method and was characterized by thermal analysis. The TGA reports that the degradation of RM-CNT starts at 400–500°C with confirmed large peaks depicting the formation of carbon with amorphous structure thus minimizing the degradation at higher temperature ranges.…”