Tuning of water resistance and protein adsorption capacity of porous cellulose nanofiber particles prepared by spray drying with cross-linking reaction

• Published in: Journal of colloid and interface science Vol. 630; pp. 134 - 143
• Main Authors: Nguyen, Tue Tri, Toyoda, Youhei, Saipul Bahri, Nur Syakirah Nabilah, Rahmatika, Annie M., Cao, Kiet Le Anh, Hirano, Tomoyuki, Takahashi, Katsuo, Goi, Yohsuke, Morita, Yuko, Watanabe, Mai, Ogi, Takashi
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 15.01.2023
• Subjects: 2,2,6,6-Tetramethylpiperidinyl-1-oxyl-oxidized cellulose nanofiber; Carbodilite; Cross-linker; Porous particle; Spray drying; Water resistance; TOCN; BJH; TOCN-C-X; Porous particle; DI; Cross-linker; TOCN-0; Spray drying; Water resistance; 2,2,6,6-Tetramethylpiperidinyl-1-oxyl-oxidized cellulose nanofiber; BET; PMMA; FTIR; Carbodilite; SEM
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2022.10.078

[Display omitted] Porous particles composed of 2,2,6,6-tetramethylpiperidinyl-1-oxyl-oxidized cellulose nanofiber (TOCN) as building block, i.e., porous TOCN particles, are attracting attention due to their environmental friendliness, superior properties, such as easy handling, large surface area, and high adsorption capacity. However, the instability of TOCNs in aqueous environments limits their applications. An effective solution to improve water resistance of TOCN particles is to reduce the hydrophilicity of TOCNs by forming chemical bonds with a cross-linker. In this study, Carbodilite, a common, easy-to-use, commercially available cross-linker with carbodiimide groups, was used to investigate a chemical cross-linking strategy for porous TOCN particles prepared by spray drying. The water resistance of cross-linked TOCN particles was evaluated through morphological observation by SEM images. The presence of polycarbodiimide significantly increased water resistance of cross-linked TOCN particles up to 24 h. This study demonstrates the trade-off between water resistance and adsorption efficiency according to cross-linker concentrations. These data are useful for interface science of TOCNs in liquids, assisting in controlling specific properties of porous TOCN particles for particular applications in adsorption and separation.