Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive
To bring surface hydrophobicity to thermoplastic starch (TPS) materials for food packaging, fatty acid starch esters (FASE), specifically starch tri-laurate, were incorporated into TPS formulations. A total of three different ratios of FASE (2%, 5% and 10%) were added to the TPS formulation to evalu...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/19/6739 |
| _version_ | 1797477825250328576 |
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| author | Caroline Terrié Angélique Mahieu Vincent Lequart Patrick Martin Nathalie Leblanc Nicolas Joly |
| author_facet | Caroline Terrié Angélique Mahieu Vincent Lequart Patrick Martin Nathalie Leblanc Nicolas Joly |
| author_sort | Caroline Terrié |
| collection | DOAJ |
| description | To bring surface hydrophobicity to thermoplastic starch (TPS) materials for food packaging, fatty acid starch esters (FASE), specifically starch tri-laurate, were incorporated into TPS formulations. A total of three different ratios of FASE (2%, 5% and 10%) were added to the TPS formulation to evaluate the influence of FASE onto physico-chemical properties of TPS/FASE blends, i.e., surface hydrophobicity, dynamic vapor sorption (DVS), and tensile behaviors. Blending TPS with FASE leads to more hydrophobic materials, whatever the FASE ratio, with initially measured contact angles ranging from 90° for the 2%-FASE blend to 99° for the 10%-blend. FT-IR study of the material surface and inner core shows that FASE is mainly located at the material surface, justifying the increase of material surface hydrophobicity. Despite this surface hydrophobicity, blending TPS with FASE seems not to affect blend vapor sorption behavior. From a mechanical behavior perspective, the variability of tensile properties of starch-based materials with humidity rate is slightly reduced with increasing FASE ratio (a decrease of maximal stress of 10–30% was observed for FASE ratio 2% and 10%), leading to more ductile materials. |
| first_indexed | 2024-03-09T21:23:14Z |
| format | Article |
| id | doaj.art-f2fc4f1de45745b9bbde549402021b75 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T21:23:14Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-f2fc4f1de45745b9bbde549402021b752023-11-23T21:16:29ZengMDPI AGMolecules1420-30492022-10-012719673910.3390/molecules27196739Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as AdditiveCaroline Terrié0Angélique Mahieu1Vincent Lequart2Patrick Martin3Nathalie Leblanc4Nicolas Joly5Univ. Artois, UniLaSalle, ULR7519—Transformations & Agro-Ressources, Normandie Université, F-76130 Mont-Saint-Aignan, FranceUniv. Artois, UniLaSalle, ULR7519—Transformations & Agro-Ressources, Normandie Université, F-76130 Mont-Saint-Aignan, FranceUniv. Artois, UniLaSalle, ULR7519—Unité Transformations & Agro-Ressources, F-62408 Béthune, FranceUniv. Artois, UniLaSalle, ULR7519—Unité Transformations & Agro-Ressources, F-62408 Béthune, FranceUniv. Artois, UniLaSalle, ULR7519—Transformations & Agro-Ressources, Normandie Université, F-76130 Mont-Saint-Aignan, FranceUniv. Artois, UniLaSalle, ULR7519—Unité Transformations & Agro-Ressources, F-62408 Béthune, FranceTo bring surface hydrophobicity to thermoplastic starch (TPS) materials for food packaging, fatty acid starch esters (FASE), specifically starch tri-laurate, were incorporated into TPS formulations. A total of three different ratios of FASE (2%, 5% and 10%) were added to the TPS formulation to evaluate the influence of FASE onto physico-chemical properties of TPS/FASE blends, i.e., surface hydrophobicity, dynamic vapor sorption (DVS), and tensile behaviors. Blending TPS with FASE leads to more hydrophobic materials, whatever the FASE ratio, with initially measured contact angles ranging from 90° for the 2%-FASE blend to 99° for the 10%-blend. FT-IR study of the material surface and inner core shows that FASE is mainly located at the material surface, justifying the increase of material surface hydrophobicity. Despite this surface hydrophobicity, blending TPS with FASE seems not to affect blend vapor sorption behavior. From a mechanical behavior perspective, the variability of tensile properties of starch-based materials with humidity rate is slightly reduced with increasing FASE ratio (a decrease of maximal stress of 10–30% was observed for FASE ratio 2% and 10%), leading to more ductile materials.https://www.mdpi.com/1420-3049/27/19/6739thermoplastic starchfatty acid starch estershydrophobizationcomposition-properties relationshipdynamic vapor sorption (DVS)contact angle |
| spellingShingle | Caroline Terrié Angélique Mahieu Vincent Lequart Patrick Martin Nathalie Leblanc Nicolas Joly Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive Molecules thermoplastic starch fatty acid starch esters hydrophobization composition-properties relationship dynamic vapor sorption (DVS) contact angle |
| title | Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive |
| title_full | Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive |
| title_fullStr | Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive |
| title_full_unstemmed | Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive |
| title_short | Towards the Hydrophobization of Thermoplastic Starch Using Fatty Acid Starch Ester as Additive |
| title_sort | towards the hydrophobization of thermoplastic starch using fatty acid starch ester as additive |
| topic | thermoplastic starch fatty acid starch esters hydrophobization composition-properties relationship dynamic vapor sorption (DVS) contact angle |
| url | https://www.mdpi.com/1420-3049/27/19/6739 |
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