From high oleic vegetable oils to hydrophobic starch derivatives: I. Development and structural studies

Novel Starch/Chitosan/Aloe Vera Composites as Promising Biopackaging Materials

“…Analogous difficulties concern the spectral region between 900 and 1200 cm −1 where intense absorption bands are present due to the C-O-C stretching vibration of polysaccharide in Aloe vera gel but also in starch. This moiety, called "saccharide band", is sensitive to some conformational changes and is directly related to the crystal and amorphous phase in samples [4]. It is reported that the band at ~ 991 cm −1 , assigned to C-O stretching vibration in the C-O-C anhydroglucose ring and intramolecular hydrogen bonding of OH groups at C-6, is attributed to Absorbance the amorphous structure in starch, whereas peaks at 1083 and 1158 cm -1 are associated with C-O and C-OH bending vibration and determine the proportion of the crystalline phase [27].…”

“…Thus, a suitable physico-chemical modification of native starch is aimed at modifying its properties according to industrial requirements and applicability [4][5][6]. It concerns improving the starch processing methods but it is also intended to obtain a material preventing biocompatible or antimicrobial properties.…”

The Importance of Ionic Liquids in the Modification of Starch and Processing of Starch-Based Materials

“…Thus, the authors presented a highly efficient and environmentally friendly method of obtaining hydrophobic and thermoplastic starch derivatives in the presence of ILs. In 2019, Żarski et al again used immobilized lipase from T. lanuginosus and [BMIM]Cl to esterify potato starch [ 85 ]. This time, hydrolysates of high-oleic vegetable oils (pure and waste rapeseed oil) were used as esterifying agents.…”

“…It was proven by using SEM and X-ray methods that a reduced pressure of >20 hPa and temperature of 60 °C for 30 minutes allows for successfully obtaining up to 30% starch gel [ 85 ]. Potato starch esters obtained in ILs by Zarski et al [ 85 ] have been structurally, physico-chemically [ 85 ], and functionally [ 86 ] characterized. Films extruded from them exhibited increased hydrophobicity and improved mechanical properties while retaining biodegradability and non-phytotoxicity.…”

Morphological, Structural, and Functional Evaluation of Rice Starch Acylated in a System Catalyzed by the B‐Lipase of Candida antarctica

“…[3] The introduction of different functional groups into the structure of native starch through etherification, esterification, reticulation, and oxidation reactions, among different modifying agents and hydroxyl groups of the polysaccharide, allows widening the range of its applications to different fields. [3,5] Among the known chemical modifications, acylation reactions have been outstanding, given that they modify the hydrophilic nature of the treated polymer and significantly changeits mechanical and thermal properties; the polymer becomes potentialized owing to the wide array of acyl donors that are used, conferring a great variety of features on the modified starch. [5] In recent decades, biocatalysts have become an alternative to catalytically efficient processes; [6,7] although conventional catalysis is faster compared with the enzymatic one, the latter proceeds under softer reaction conditions, without aggressive solvents, and generates a few or no sub-products, considering the regio-and enantioselectivity of the enzymes' presence, making it more advantageous compared with chemical catalysis.…”