Blended Film from PVA and Sansevieria trifasciata Dichloromethane Fraction for Reducing Heat Radiation from Smartphones

Ilmiawati, Auliya; Pujiyati, Pujiyati; Hidayat, Asep; Sugita, Purwantiningsih; Irfana, Luthfan; arifin, budi

doi:10.7454/mss.v23i2.11046

Cited by 1 publication

(2 citation statements)

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“…However, there are reports of Rubber magnets based on NBR and lithium ferrite that can absorb electromagnetic radiation [35]. However, based on our previous research, the fraction has the potential to be identified as steroid compound [24]. Moreover, the literature reports that the C-O, C=O, and C-OH functional groups are common functional groups contained in electromagnetic radiation-absorbing materials and work with a dipolar polarization mechanism [36].…”

Section: Identification Of Compoundmentioning

confidence: 99%

“…The film from a combination of polyvinyl alcohol (PVA) and 0.02% dichloromethane (DCM) fraction succeeded in reducing thermal radiation by 4.4 °C in the first minute and was stable for up to 20 min. This composite film was more effective than commercial casing used as controls [24]. That research only tested heat radiation on smartphones, even though electromagnetic radiation from smartphones is also dangerous.…”

Section: ■ Introductionmentioning

confidence: 99%

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Films from PVA and <i>Sansevieria trifasciata</i> Leaves Extracts as a Smartphone Protector with Radiation Reducing Property and Its LC-MS Analysis

Ilmiawati,

Falestin,

Maddu

et al. 2023

Indones. J. Chem.

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Sansevieria trifasciata (mother-in-law's tongue), an ornamental plant widely found in Indonesia, can absorb electromagnetic radiation in various electronic devices. This study aims to find the best S. trifasciata extract as an electromagnetic and thermal radiation reducer emitted from a smartphone. S. trifasciata leaves were macerated using ethanol, acetone, and dichloromethane. The extract was mixed with PVA as a film and tested for electromagnetic radiation using a radiation measuring device type GM-3120. Thermal radiation was tested using a temperature sensor (PASCO CI-6505B) connected to a PASCO 550 Universal Interface. All smartphone protective films decreased radiation from the smartphone, and the acetone extract caused the most significant radiation decrease, with the best results at a concentration of 5%. An S. trifasciata extract contained alkaloids, saponins, steroids, phenolics, and tannins based on the phytochemical tests. Based on LC-MS data, the dominant compounds identified from the three extracts of S. trifasciata is a group of alkaloids, fatty acid, and steroid. The functional groups that are thought to play a role in reducing radiation are the C-O, C=O, and C-OH functional groups. A compound that is thought to contribute to the reduction in radiation is neuroscogenin, a steroid group.

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Section: Identification Of Compoundmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%