chitosan bead
Recently Published Documents


TOTAL DOCUMENTS

51
(FIVE YEARS 3)

H-INDEX

18
(FIVE YEARS 0)

2021 ◽  
Vol 35 (4) ◽  
pp. 301-309
Author(s):  
Jeongwoo Shin ◽  
Taehoon Kim ◽  
Youngmin Lee ◽  
Byungryul An

Author(s):  
Thamy G. P. Sobreira ◽  
Kátia A. S. Aquino ◽  
Frederico D. Menezes ◽  
Rômulo P. Tenório ◽  
Elvis J. França
Keyword(s):  

2020 ◽  
Vol 316 ◽  
pp. 128003 ◽  
Author(s):  
Chia-Tung Lin ◽  
Shao-Hsuan Kuo ◽  
Pei-Heng Lin ◽  
Pei-Huan Chiang ◽  
Wan-Hsuan Lin ◽  
...  

2020 ◽  
Vol 74 (10) ◽  
pp. 3367-3381
Author(s):  
Gustavo Alves Puiatti ◽  
Felipe Santana de Oliveira Cruz ◽  
Mayra Aparecida Nascimento ◽  
André Fernando de Oliveira ◽  
Renata Pereira Lopes

Gels ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 11 ◽  
Author(s):  
Andrew Worthen ◽  
Kelly Irving ◽  
Yakov Lapitsky

Chitosan beads attract interest in diverse applications, including drug delivery, biocatalysis and water treatment. They can be formed through several supramolecular pathways, ranging from phase inversion in alkaline solutions, to the ionic crosslinking of chitosan with multivalent anions, to polyelectrolyte or surfactant/polyelectrolyte complexation. Many chitosan bead uses require control over their stability to dissolution. To help elucidate how this stability depends on the choice of supramolecular gelation chemistry, we present a comparative study of chitosan bead stability in acidic aqueous media using three common classes of supramolecular chitosan beads: (1) alkaline solution-derived beads, prepared through simple precipitation in NaOH solution; (2) ionically-crosslinked beads, prepared using tripolyphosphate (TPP); and (3) surfactant-crosslinked beads prepared via surfactant/polyelectrolyte complexation using sodium salts of dodecyl sulfate (SDS), caprate (NaC10) and laurate (NaC12). Highly variable bead stabilities with dissimilar sensitivities to pH were achieved using these methods. At low pH levels (e.g., pH 1.2), chitosan/SDS beads were the most stable, requiring roughly 2 days to dissolve. In weakly acidic media (at pH 3.0–5.0), however, chitosan/TPP beads exhibited the highest stability, remaining intact throughout the entire experiment. Beads prepared using only NaOH solution (i.e., without ionic crosslinking or surfactant complexation) were the least stable, except at pH 5.0, where the NaC10 and NaC12-derived beads dissolved slightly faster. Collectively, these findings provide further guidelines for tailoring supramolecular chitosan bead stability in acidic media.


Sign in / Sign up

Export Citation Format

Share Document