title: Structure of starch aerogel as affected by crosslinking and feasibility assessment of the aerogel for an anti-fungal volatile release.
abstract: Starch suspensions were crosslinked with trisodium citrate for either 0 or 17h, gelled and then freeze-dried to corresponding aerogels. The aerogel from the 17h-crosslinked suspension was loaded with the antifungal compound, trans-2-hexenal, and coated with the surfactant, sorbitan monooleate. Aerogel hardness was increased by the citrate-mediated crosslinking, whereas its adhesiveness decreased. Starch gelation decreased the crystallinity index (CrI) from 59% to ≈23%; however, the pre-gelation crosslinking resulted in a higher CrI value (i.e. ≈38%) for the aerogel. The voids at the internal microstructure of the 17h-crosslinked aerogel were more uniform and coating with surfactant closed the surface openings. The latter accordingly resulted in a more sustained release of the volatile, trans-2-hexenal, from the crosslinked starch aerogel and led to slower lethality of Aspergillus parasiticus cells inoculated on pistachio nuts compared with the non-coated condition.
authors.affiliation: Department of Food Science and Engineering, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
authors.forename: Negar
authors.initials: N
authors.lastname: Abhari
authors.affiliation: Department of Food Science and Engineering, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran. Electronic address: a.madadlou@ut.ac.ir.
authors.forename: Ashkan
authors.initials: A
authors.lastname: Madadlou
authors.affiliation: Pistachio Safety Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Dini
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D000935:Antifungal Agents / Q000737:chemistry* / Q000494:pharmacology; D001230:Aspergillus / Q000737:chemistry / Q000187:drug effects; D002951:Citrates / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D005240:Feasibility Studies; D005506:Food Contamination / Q000517:prevention & control; D005516:Food Microbiology; D005612:Freeze Drying; D005782:Gels / Q000737:chemistry*; D006601:Hexoses / Q000737:chemistry; D050296:Microbial Viability / Q000187:drug effects; D009754:Nuts / Q000382:microbiology; D027927:Pistacia / Q000382:microbiology; D013213:Starch / Q000737:chemistry* / Q000494:pharmacology; D013501:Surface-Active Agents; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D000935:Antifungal Agents; D002951:Citrates; D020099:Coated Materials, Biocompatible; D005782:Gels; D006601:Hexoses; D013501:Surface-Active Agents; D055549:Volatile Organic Compounds; C514290:trisodium citrate; C018665:sorbitan monooleate; C051750:2-hexenal; D013213:Starch
keywords: Antimicrobe; Surfactant; Volatile