Sugarcane bagasse derived phosphorylated cellulose as substrates for potassium release induced by phosphates surface and drying methods

Author(s)

Messa, Lucas Luiz ; Hsieh, You-Lo ; Faez, Roselena

• Document type: Journal article
• Source: INDUSTRIAL CROPS AND PRODUCTS; v. 187, p. 10-pg., 2022-07-20.

Abstract

Encapsulation and controlled release of potassium by phosphorylated cellulose (P-cell) was systematically demonstrated by drying of aqueous P-cell suspensions with potassium chloride (KCl) in varied stoichiometric K+/Cell-O-HPO3- ratios of 1:1, 2:1, and 4:1, and dried into powder-like fibrous fluffs, paper-like films, and three-dimensional porous structures by spray-, oven-, and freeze-drying. Cellulose isolated from sugarcane bagasse as agricultural waste was optimally phosphorylated at 1:0.5:2 anhydroglucose (AHG)/(NH4)(2)HPO4/CO(NH2)(2) as 14.6 mu m wide, ca. 366 mu m long, highly crystalline (72%) microfibers with 2.4 mmol g(-1) charge. Oven drying led to more crystalline (73%) and thermally stable (252.1 degrees C) films than spray-dried powders (67%, 250.5 degrees C) and freeze-dried porous bulk (71%, 249.8 degrees C). The release of highly water-soluble KCl from these three P-cell substrates was highest from the fibrous (90.4-97.3%), three-dimensional porous structure solids (73.5-81.7%), then films (60.4-74.5%), thus could be tuned by varying the anionic/cationic loadings along with drying methods. (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: 17/03980-7 - Fertilizer-releasing biocomposites based on chitosan and cellulose obtained by spray drying technique
• Grantee: Lucas Luiz Messa
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• 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)