Synthesis, Characterization And Reaction Mechanism Study Of Glyoxylic Acid Modified Collagen Fiber Adsorbent
Keywords
Collagen Fiber (Cf), Carboxylation Modification, Adsorbent Material, Characterization, Modification Mechanism
Abstract
In order to improve the adsorption efficiency of pig skin collagen fiber (CF) to Cr3+ in wastewater, glyoxylic acid (GA) was used as a modifier to carboxylate CF to prepare a collagen fiber-based adsorption material; chemical analysis was used The amino and carboxyl content of the collagen fibers before and after modification were measured respectively, and the isoelectric point of the collagen fibers before and after modification was measured by a Zeta potential analyzer; the results showed that the amino content of the collagen fibers after modification decreased by 69.23%. The carboxyl content increased by approximately 52.77%, and the isoelectric point decreased from the original 6.91 to 5.45; the specific surface area and porosity measurement results showed that glyoxylic acid modification can effectively increase the specific surface area of collagen fibers and reduce their porosity; SEM and FT were used -IR and DSC characterized the tissue morphology, molecular structure and thermal properties of collagen fibers before and after modification, and studied the carboxylation modification mechanism through collagen modification and amino acid analysis.
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Original research was done by Ren Longfang, Qiang Taotao, Bu Qiaoqiao, Wang Xuechuan
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