Production of potential antioxidant and antimicrobial active films of poly (vinyl alcohol) incorporated with cashew tree extract

Abstract

Traditional packaging was developed to act as a protective barrier against the external environment. It was also designed to interact as little as possible with the packaged food (Khaneghah et al., 2018).However, these characteristics are no longer sufficient for new consumers, increasingly concerned and demanding environmentally friendly, healthy, sophisticated products that provide greater food security (Bhargava et al., 2020). Over the years, the need for new materials that extend the shelf life of food has emerged (Bhargava et al., 2020;Khaneghah et al., 2018). As a result, a new packaging concept emerged as active packaging.

Fabricating of poly(vinyl alcohol)/halloysite nanotubes/gelatin composite sponges with enhanced mechanical properties and rapid water absorption speed

“…The absorption peaks of the pure PVA sponge at ν = 2900 cm −1 correspond to the stretching vibration of CH in PVA 51 . The band at ν = 1045 cm −1 is attributed to the COH stretching vibration in fatty alcohols 55 . The multiple absorption peaks observed in the range of ν = 1000–1240 cm −1 correspond to the CO and COC bands produced by the crosslinking reaction of PVA with formaldehyde 56 .…”

“…51 The band at ν = 1045 cm À1 is attributed to the C O H stretching vibration in fatty alcohols. 55 The multiple absorption peaks observed in the range of ν = 1000-1240 cm À1 correspond to the C O and C O C bands produced by the crosslinking reaction of PVA with formaldehyde. 56 There are new peaks in the infrared spectrum of the composite sponges, which indicate the inclusion of gelatin and HNTs in PVA matrix.…”