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Role of Hydrogen Bo...
Role of Hydrogen Bonding in Wheat Gluten Protein Systems Plasticized with Glycerol and Water
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- Özeren, Hüsamettin Deniz (författare)
- KTH,Polymera material,KTH, Polymera material
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- Wei, Xin-Feng (författare)
- KTH,Fiber- och polymerteknologi,KTH, Fiber- och polymerteknologi
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- Nilsson, Fritjof, Docent, 1978- (författare)
- KTH,Polymera material,KTH, Polymera material
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- Olsson, Richard (författare)
- KTH,Polymera material,KTH, Polymera material
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- Hedenqvist, Mikael S. (författare)
- KTH,Polymera material,KTH, Polymera material
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(creator_code:org_t)
- Elsevier BV, 2021
- 2021
- Engelska.
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Ingår i: Polymer. - : Elsevier BV. - 0032-3861 .- 1873-2291. ; 232, s. 124149-
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://www.scienced...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Many biopolymers are stiff and brittle and require plasticizers. To optimize the choice and amount of plasticizer, the mechanisms behind plasticization need to be understood. For polar biopolymers, such as polysaccharides and proteins, plasticization depends to a large extent on the hydrogen bond network. In this study, glycerol-plasticized protein systems based on wheat gluten were investigated, in combination with the effects of water. The methodology was based on a combination of mechanical tests and molecular dynamics simulations (MD). The simulations accurately predicted the glycerol content where the experimental depression in glass transition temperature (Tg) occurred (between 20 and 30 wt.% plasticizer). They also predicted the strong water-induced depression in Tg. Detailed analysis revealed that in the dry system, the main effect of glycerol was to break protein-protein hydrogen bonds. In the moist system, glycerol was partly outcompeted by water in forming hydrogen bonds with the protein, making the glycerol plasticizer less effective than in dry conditions. These results show that MD can successfully predict the plasticizer concentration at which the onset of efficient plasticization occurs. MD can therefore be an important tool for understanding plasticizer mechanisms, even in a complex system, on a level of detail that is impossible with experiments.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Plasticization
- Protein
- Simulations
- Gluten
- Glycerol
- Water
- Hydrogen bonds
- Fiber- och polymervetenskap
- Fibre and Polymer Science
- Kemi
- Chemistry
- Material and Nano Physics
- Material- och nanofysik
Publikations- och innehållstyp
- vet (ämneskategori)
- art (ämneskategori)
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