Eco-friendly surface hydrophobization of all-cellulose composites using layer-by-layer deposition - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Express Polymer Letters Année : 2020

Eco-friendly surface hydrophobization of all-cellulose composites using layer-by-layer deposition

Résumé

All-cellulose composites were prepared by dispersing kraft fibers in a matrix made from pulp dissolved in NaOHwater. To hydrophobize the composite surface while maintaining the material fully bio-based and biodegradable, layer-bylayer deposition of cationic starch and carnauba wax was performed. Various options of surface coating, drying, and curing were tested, including partial and complete melting of the wax. The composite surface was characterized by water contact angle, roughness and scanning electron microscopy, and material properties by adsorption and absorption of water (in vapor and liquid form) and tensile testing. The highest water contact angle was obtained when the layer-by-layer deposition was performed by dipping the dry composite into cationic starch solution, then in wax dispersion, and partially melting the wax after coating. However, it was demonstrated that the dipping approach was detrimental to material tensile properties, due to heterogeneous swelling of cellulose during the treatment and multiple drying sequences. Process optimization via spraying resulted in composites with Young’s modulus of 6 GPa and hydrophobic surface with water contact angle 122 °C

Domaines

Polymères
Fichier principal
Vignette du fichier
Eco-friendly surface hydrophobization of all-cellulose composites.pdf (566.36 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03100453 , version 1 (13-01-2022)

Identifiants

Citer

O. Korhonen, N. Forsman, M. Osterberg, Tatiana Budtova. Eco-friendly surface hydrophobization of all-cellulose composites using layer-by-layer deposition. Express Polymer Letters, 2020, 14 (10), pp.896-907. ⟨10.3144/expresspolymlett.2020.74⟩. ⟨hal-03100453⟩
98 Consultations
109 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More