The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites
In this research, different clays such as laponite and montmorillonite (NaMMT) are used as fillers in the preparation of thermoplastic starch/clay nanocomposites. Thin films are produced by casting and evaporation in a wide composition range, using glycerol as the plasticizer at two different concen...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/21/7627 |
| _version_ | 1797467425169473536 |
|---|---|
| author | Erika Fekete Lilla Angyal Emília Csiszár |
| author_facet | Erika Fekete Lilla Angyal Emília Csiszár |
| author_sort | Erika Fekete |
| collection | DOAJ |
| description | In this research, different clays such as laponite and montmorillonite (NaMMT) are used as fillers in the preparation of thermoplastic starch/clay nanocomposites. Thin films are produced by casting and evaporation in a wide composition range, using glycerol as the plasticizer at two different concentrations. The surface energy of clay fillers is measured by inverse gas chromatography (IGC); X-ray diffraction (XRD) and light transmission measurements (UV-VIS) are carried out to characterize the structure of nanocomposites; and mechanical properties and water vapor permeability are also studied. While all the starch/montmorillonite nanocomposites possess intercalated structures, significant exfoliation can be noted in the starch/laponite nanocomposites, mainly at low clay contents. Due to the larger surface energy of montmorillonite, stronger polymer/clay interactions and better mechanical properties can be assumed in starch/NaMMT composites. The smaller surface energy of laponite, however, can facilitate the delamination of laponite layers. Thus, the specific surface area of laponite can be further increased by exfoliation. Based on the results, the better exfoliation and the much larger specific surface area of laponite lead to higher reinforcement in starch/laponite nanocomposites. |
| first_indexed | 2024-03-09T18:53:27Z |
| format | Article |
| id | doaj.art-0fad388b1a2647ad932fb223b505a682 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:53:27Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-0fad388b1a2647ad932fb223b505a6822023-11-24T05:38:15ZengMDPI AGMaterials1996-19442022-10-011521762710.3390/ma15217627The Effect of Surface Characteristics of Clays on the Properties of Starch NanocompositesErika Fekete0Lilla Angyal1Emília Csiszár2Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, HungaryInstitute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, H-1117 Budapest, HungaryLaboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, HungaryIn this research, different clays such as laponite and montmorillonite (NaMMT) are used as fillers in the preparation of thermoplastic starch/clay nanocomposites. Thin films are produced by casting and evaporation in a wide composition range, using glycerol as the plasticizer at two different concentrations. The surface energy of clay fillers is measured by inverse gas chromatography (IGC); X-ray diffraction (XRD) and light transmission measurements (UV-VIS) are carried out to characterize the structure of nanocomposites; and mechanical properties and water vapor permeability are also studied. While all the starch/montmorillonite nanocomposites possess intercalated structures, significant exfoliation can be noted in the starch/laponite nanocomposites, mainly at low clay contents. Due to the larger surface energy of montmorillonite, stronger polymer/clay interactions and better mechanical properties can be assumed in starch/NaMMT composites. The smaller surface energy of laponite, however, can facilitate the delamination of laponite layers. Thus, the specific surface area of laponite can be further increased by exfoliation. Based on the results, the better exfoliation and the much larger specific surface area of laponite lead to higher reinforcement in starch/laponite nanocomposites.https://www.mdpi.com/1996-1944/15/21/7627starch/clay nanocompositelaponitemontmorillonitemechanical propertiesstructurereinforcing effect |
| spellingShingle | Erika Fekete Lilla Angyal Emília Csiszár The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites Materials starch/clay nanocomposite laponite montmorillonite mechanical properties structure reinforcing effect |
| title | The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites |
| title_full | The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites |
| title_fullStr | The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites |
| title_full_unstemmed | The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites |
| title_short | The Effect of Surface Characteristics of Clays on the Properties of Starch Nanocomposites |
| title_sort | effect of surface characteristics of clays on the properties of starch nanocomposites |
| topic | starch/clay nanocomposite laponite montmorillonite mechanical properties structure reinforcing effect |
| url | https://www.mdpi.com/1996-1944/15/21/7627 |
| work_keys_str_mv | AT erikafekete theeffectofsurfacecharacteristicsofclaysonthepropertiesofstarchnanocomposites AT lillaangyal theeffectofsurfacecharacteristicsofclaysonthepropertiesofstarchnanocomposites AT emiliacsiszar theeffectofsurfacecharacteristicsofclaysonthepropertiesofstarchnanocomposites AT erikafekete effectofsurfacecharacteristicsofclaysonthepropertiesofstarchnanocomposites AT lillaangyal effectofsurfacecharacteristicsofclaysonthepropertiesofstarchnanocomposites AT emiliacsiszar effectofsurfacecharacteristicsofclaysonthepropertiesofstarchnanocomposites |