Phosphorylated cellulose nanofibrils from sugarcane bagasse with pH tunable gelation

Full text
Author(s):	Messa, Lucas Luiz ; Faez, Roselena ; Hsieh, You-Lo Total Authors: 3
Document type:	Journal article
Source:	CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS; v. 2, p. 8-pg., 2021-12-25.
Abstract
A facile strategy is reported to convert sugarcane bagasse (SCB) cellulose into phosphorylated cellulose nanofibrils (PCNFs) whose gelation is pH-dependent via the different ionic forms of phosphoric groups (H2PO4-, HPO4-2, PO4-3). Cellulose was isolated from SCB at a 42.1% yield, then phosphorylated at an optimized 1:0.5:2 anhydroglucose (AHG)/(NH4)(2)HPO4 /CO(NH2)(2) molar ratio and, at pH 12, was in the most charged phosphate (PO4-3) to be disintegrated to generate 84.3% PCNFs. PCNFs were 3.84 nm wide, 0.73 nm high, up to 500 nm long, and highly charged (2.56 mmol g(-1)). Aqueous PCNF exhibited strongly pH-dependent gelation, gelling at 1.4 wt.% at pH 12 and at lowered 1.0 and 0.8 wt% at pH 7 and 2, respectively, enabling potential applications in full range of pH. (AU)

FAPESP's process:	19/02535-5 - Polymeric structures as host matrices for-release nutrients: environmentally friendly fertilizers
Grantee:	Roselena Faez
Support Opportunities:	Regular Research Grants


FAPESP's process:	19/08057-8 - Fertilizer-releasing biocomposites based on chitosan and cellulose obtained by spray drying technique
Grantee:	Lucas Luiz Messa
Support Opportunities:	Scholarships abroad - Research Internship - Doctorate (Direct)