Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comprehensive insight of crosslinking agent concentration influence on starch-based aerogels porous structure

Full text
Author(s):
Camani, Paulo H. [1] ; Goncalo, Maria G. M. [1] ; Barbosa, Rennan F. S. [1] ; Rosa, Derval S. [1]
Total Authors: 4
Affiliation:
[1] Fed Univ ABC UFABC, Ctr Engn Modeling & Appl Social Sci CECS, Ave Estados 5001, BR-09210580 Santo Andre, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Applied Polymer Science; v. 138, n. 34 APR 2021.
Web of Science Citations: 0
Abstract

In this work, we evaluated starch-based aerogels prepared using freeze-drying, and an eco-friendly crosslinking agent (trisodium citrate), in three different concentrations: 12.8, 19.3, and 25.7 mg ml(-1). Aerogels were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, relative density, porosity percentage, scanning electron microscopy (SEM), and water uptake. The results indicated a higher reticulation and crystallinity and lower water uptake, increasing crosslinking agent concentration (Aero 1:2). SEM images revealed the prominent presence of macroporous structure (more than 50 nm) within the aerogel, containing small and large pores within the aerogel structure. The small pores were statistically similar for Aero 1:1 and Aero 1:1.5, as observed by analysis of variance analysis, but they were statistically different from Aero 1:2. The large pores diameter increased with higher crosslinking concentration and induced them as closed pores, resulting in a less porous structure. This result is directly associated with a higher reticulation degree. Overall, the influence of crosslinking agent concentration was studied and indicated that Aero 1:1.5 presented valuable properties. (AU)

FAPESP's process: 18/11277-7 - PBAT films with cellulose nanostructures treated with essential oils encapsulated for active packaging
Grantee:Derval dos Santos Rosa
Support Opportunities: Regular Research Grants
FAPESP's process: 19/16301-6 - Starch aerogels containing modified nanocellullose for removal of heavy metals in wastewater from the industry sector
Grantee:Paulo Henrique Camani
Support Opportunities: Scholarships in Brazil - Doctorate