Investigation of Moisture Sorption Properties of Gelatin/Poly (Aniline)/Films

Bajpai, S. K.; Awasthi, Seema; Utiye, Ajay Singh; Mishra, Bharat

doi:10.15226/sojmse.2017.00147

Cited by 5 publications

(2 citation statements)

References 29 publications

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“…Saturated salt solutions NaBr, NaCl, KCl, and K 2 SO 4 (EM Science) were prepared and placed in vacuum desiccators (100 mm, VWR) to produce atmospheres with relative humidity (RH) values of 57%, 75%, 84%, and 97%, respectively. This range is commonly used for moisture experiments on fresh spinach (Bajpai et al., 2017; Chen et al., 2018; Volpe et al., 2018).…”

Section: Methodsmentioning

confidence: 99%

“…Moisture absorption Saturated salt solutions NaBr, NaCl, KCl, and K 2 SO 4 (EM Science) were prepared and placed in vacuum desiccators (100 mm, VWR) to produce atmospheres with relative humidity (RH) values of 57%, 75%, 84%, and 97%, respectively. This range is commonly used for moisture experiments on fresh spinach (Bajpai et al, 2017;Chen et al, 2018;Volpe et al, 2018). The films were cut into 1 cm × 1.5 cm rectangular pieces and dried in a convection oven for 48 h at 37 • C. The dried samples were weighed on a precision balance to the nearest 0.1 mg (Sartorius AC 210 S MC 1), and placed into the desiccators containing saturated salt solutions at 25 • C. Sample weights were recorded every 24 h. Equilibrium was achieved when the difference between two consecutive sample weights was < 0.2 mg per gram of dry solid (Su et al, 2010).…”

Section: 24mentioning

confidence: 99%

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Properties of poly (vinyl alcohol) films with embedded zeolitic imidazolate framework (ZIF‐8) nanoparticles for food packaging applications

Hara

Castell‐Perez

Moreira

2023

Journal of Food Science

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This study evaluated the physical, mechanical, barrier properties, and transition temperatures of poly (vinyl alcohol) (PVA) films with embedded zeolitic imidazolate framework-8 (ZIF-8) nanoparticles carrying a natural antimicrobial, trans-cinnamaldehyde (TC). The ZIF-8 nanoparticles were synthesized using a sonochemical method and incorporated into polymeric matrices at mass ratio concentrations of 0% (control film) to 5% weight of ZIF-8@TC to PVA. Solutions were mixed, cast onto Petri dishes and dried for 12 h at 37 • C in a ventilated oven. The film samples were stored in airtight containers at room temperature and used within 1 week. The engineering properties of the PVA/ZIF-8@TC films were compared with those of low-density polyethylene (LDPE) film commonly used for packaging of spinach leaves. The glass transition, melting, and crystallization temperatures of PVA compositive films all increased (p < 0.05) with ZIF-8@TC concentration. When exposed to high relative humidity environments, the PVA/ZIF-8@TC films had lower equilibrium moisture content (p < 0.05) than the LDPE film. Although the composite films have different tensile properties from the LDPE film, embedding ZIF-8@TC into PVA films improved the tensile strength by 17%, making the PVA/ZIF-8@TC films suitable for low load-bearing applications such as food packaging. The gas barrier properties of PVA-based films differed only slightly with added ZIF-8@TC (p < 0.05).

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Section: Methodsmentioning

confidence: 99%