1. Hydrophobic surface treatments of sunflower pith using eco-friendly processes
- Author
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Nirina Randrianandrasana, Nathalie Leblanc, Laurence Lecamp, Nadège Follain, Redouan Saiah, Stéphane Marais, Kateryna Fatyeyeva, Polymères Biopolymères Surfaces (PBS), Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Unité de recherche en agro-écologie des territoires (AGRI'TERR ), and École supérieure d'ingénieurs et de techniciens pour l'agriculture (ESITPA)
- Subjects
Materials science ,Polymers and Plastics ,Plasma treatment ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,chemistry.chemical_compound ,[CHIM]Chemical Sciences ,Composite material ,ComputingMilieux_MISCELLANEOUS ,2. Zero hunger ,Water resistance ,Chemical modification ,021001 nanoscience & nanotechnology ,Pulp and paper industry ,Sunflower ,Environmentally friendly ,6. Clean water ,0104 chemical sciences ,Epoxidized soybean oil ,Vegetable oil ,[CHIM.POLY]Chemical Sciences/Polymers ,chemistry ,Pith ,0210 nano-technology ,circulatory and respiratory physiology - Abstract
The aim of the present paper is to report the reduction of the water uptake of sunflower pith, sustainable raw by-product without current added-value in oilseed crops production. The water-sensitivity is ascribed to its structure, because mainly constituted of carbohydrates, due to the formation of additional hydrogen bondings with water molecules. Two environmentally-friendly approaches were applied to provide a modified layer presenting water resistance in surface of sunflower pith in order to keep its low-density property. The first approach based on vegetable oil corresponds to thermal and photochemical treatments. A thin layer of virgin or acrylated epoxidized soybean oil was sprayed on the pith surface, and thereafter was thermally cured or photocured, respectively. The second approach consisted in a solventless chemical modification of the pith surface by a cold plasma treatment. Both approaches were successfully performed: water resistance of sunflower pith was clearly enhanced, especially with oil-based treatments; while maintaining its integrity. Developing new and promising ecological water-resistant products of low density from sunflower pith is thought of increasing interest with potential practical applications.
- Published
- 2015
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