CAJ | 학술논문

为了提高猪皮胶原纤维(CF)对废水中 Cr3+的吸附效率，以乙醛酸(GA)为改性剂，对 CF 进行羧基化改性，制备了一种胶原纤维基吸附材料；采用化学分析法分别测定了改性前后胶原纤维中氨基及羧基含量，并通过zeta电位分析仪对改性前后的胶原纤维的等电点进行了测定。结果表明，改性后胶原纤维氨基含量降低69.23%，羧基含量增加了约52.77%，等电点由原来的6.91降低至5.45；比表面积及空隙率测定结果表明乙醛酸改性可有效增加胶原纤维的比表面积，降低其孔隙率；采用 SEM、FT-IR、DSC 对改性前后胶原纤维的组织形态、分子结构及热性能进行了表征，通过胶原修饰和氨基酸分析对羧基化改性机理进行了研究。
위료제고저피효원섬유(CF)대폐수중 Cr3+적흡부효솔，이을철산(GA)위개성제，대 CF 진행최기화개성，제비료일충효원섬유기흡부재료；채용화학분석법분별측정료개성전후효원섬유중안기급최기함량，병통과zeta전위분석의대개성전후적효원섬유적등전점진행료측정。결과표명，개성후효원섬유안기함량강저69.23%，최기함량증가료약52.77%，등전점유원래적6.91강저지5.45；비표면적급공극솔측정결과표명을철산개성가유효증가효원섬유적비표면적，강저기공극솔；채용 SEM、FT-IR、DSC 대개성전후효원섬유적조직형태、분자결구급열성능진행료표정，통과효원수식화안기산분석대최기화개성궤리진행료연구。
The carboxylated collagen fiber (CCF)was prepared by modifying collagen fiber (CF)with glyoxylic acid.The contents of amino and carboxyl of CF and CCF were measured by chemical analysis methods,and the isoelectric point of CF and CCF was determined by zeta potential analyzer.The results indicated that the amino content decreased by 69.23% while carboxyl content increased by 52.77% after modification,and the isoelectric point from 6.91 down to 5.45.The result of surface area and porosity determination showed that the acetalde-hyde acid modification can effectively increase the specific surface area and reduce the porosity of the collagen fi-ber.Furthermore,the form,structure and thermal properties of CF and MCF were characterized and analyzed by SEM,FT-IR and DSC respectively.Finally,the reaction mechanism between aldehyde acid and collagen fi-ber was studied by means of collagen molecule modification and amino acid analysis.