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Hydration and dehyd...
Hydration and dehydration induced changes in porosity of starch microspheres
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- Digaitis, Ramūnas, PhD (författare)
- Malmö universitet,Biofilms Research Center for Biointerfaces,Institutionen för biomedicinsk vetenskap (BMV)
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- Falkman, Peter (författare)
- Malmö universitet,Institutionen för biomedicinsk vetenskap (BMV),Biofilms Research Center for Biointerfaces
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- Oltner, Viveca (författare)
- Magle Chemoswed AB, Malmö, Sweden
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- Briggner, Lars-Erik (författare)
- Magle Chemoswed AB, Malmö, Sweden; Adroit Science AB, Lund, Sweden
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- Kocherbitov, Vitaly (författare)
- Malmö universitet,Institutionen för biomedicinsk vetenskap (BMV),Biofilms Research Center for Biointerfaces
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(creator_code:org_t)
- Elsevier, 2022
- 2022
- Engelska.
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Ingår i: Carbohydrate Polymers. - : Elsevier. - 0144-8617 .- 1879-1344. ; 291, s. 119542-119542
- Relaterad länk:
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https://doi.org/10.1...
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https://mau.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Characterization and tuning of the porosity of amorphous starch materials are important for many applications, including controlled release of encapsulated proteins. The porosities of these materials in dry and hydrated states can have different physicochemical origins and properties. Here, porosities of dry cross-linked starch microspheres and their hydration-induced transformations were characterized by small angle X-ray scattering, scanning electron and optical microscopies, thermogravimetric analysis, sorption calorimetry, nitrogen sorption, and helium-pycnometry. The analyses revealed that dry microspheres consist of porous cores with pore diameters below 100 nm and shells which appeared to be denser but contained wider pores (100–300 nm). The outer crust of the microspheres shell is non-porous, which restricts diffusion of nitrogen, water, and ethanol. Partial hydration triggered an irreversible collapse of dry porosity at 12 wt% water. Further hydration resulted in interfacial changes and promoted wet porosity, related to characteristic distances between polymer chains.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
Nyckelord
- Degradable starch microspheres
- Cross-linking
- Dry porosity
- Wet porosity
- Water sorption
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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