Synthesis, characterization, and biological evaluation of novel selenium-containing chitosan derivatives

Chen, Wanwen; Cheng, Hao; Chen, Lingyun; Zhan, Xi; Xia, Wenshui

doi:10.1016/j.carbpol.2022.119185

Cited by 21 publications

(2 citation statements)

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“…In the TGA curve corresponding to chitosan, it can be seen that in the range 25− 100 °C, it starts to lose 8% of its mass, which represents the loss of adsorbed water. 60 In the second stage, the primary degradation of CHI occurs between 230 and 425 °C with a loss of 51% of its mass due to polysaccharides bond depolymerization and side group elimination. At a temperature of ∼425 °C, the third stage of thermal degradation takes place by a thermooxidative mechanism, with ∼31% mass loss.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The main factor responsible for the thermal stability of the material is the dissociation energy of the covalent bonds forming its structure. In the TGA curve corresponding to chitosan, it can be seen that in the range 25–100 °C, it starts to lose 8% of its mass, which represents the loss of adsorbed water . In the second stage, the primary degradation of CHI occurs between 230 and 425 °C with a loss of 51% of its mass due to polysaccharides bond depolymerization and side group elimination.…”

Section: Resultsmentioning

confidence: 99%

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Chitosan as a Polyfunctional Crosslinker for a Renewable-Based Resorcinol Diglycidyl Ether

Măluțan

Mija

2023

ACS Sustainable Chem. Eng.

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Chitosan is an abundant renewable biopolymer, insufficiently valorized, which is suitable for the development of sustainable and fully biobased materials. In this study, we combined it with the resorcinol diglycidyl ether, a biobased monoaromatic diepoxide. Formulations with a high chitosan content of up to 44 wt % were investigated and showed high reactivity and appropriate intervals of polymerization, ranging from 75 to 125 or 155 °C. The in situ Fourier transform infrared (FTIR) spectroscopy analysis confirmed that the two compounds reacted via an anionic polymerization mechanism combined with polyaddition reactions, proving that the chitosan acts as a polyfunctional crosslinker. The obtained thermoset resins have tan δ values ranging between 79 and 73 °C and storage moduli increasing with chitosan content (E′ ∼3.5−4.2 GPa), together with high crosslinking densities (15.65−27 mmol• cm −3 ).

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%