超支化胶原纤维吸附剂的合成与表征

摘要

六价铬Cr(Ⅵ)是工业废水排放中严格控制的污染物之一.利用端氨基超支化聚酰胺(HPBN)末端所具有的大量活性官能团,采用戊二醛作为交联剂将HB-PN负载于胶原纤维上合成了一种新型的超支化胶原纤维吸附剂(CF-HBPN).以CF-HBPN的氨基含量为指标,考察了不同反应条件对产物氨基含量的影响.利用IR、DSC-TGA、SEM-EDS等对产物进行检测与表征.实验结果表明此种吸附剂制备的最佳反应条件为m (CF):m(HBPN)=1∶0.7,交联剂用量为0.533mL/gCF,温度为40℃,反应时间为5h,改性后CF-HBPN的氨基含量较CF提高3.27倍.所制备的吸附剂用于含Cr(Ⅵ)废液的吸附,去除率达到99.57％.%Cr (VI) is one of contaminants in the industrial wastewater under strict control of pollution. This study used glutaraldehyde as crosslinking agent to graft hyperbranched polyamide amine(HPBN) onto collagen fiber(CF) to prepare hyperbranched collagen fiber absorbent(CF-HBPN). The influence of different conditions on the treatment effect was studied by the amino group content of CF-HBPN. IR, DSC-TGA, SEM-EDS were used to characterized the structure of product. The experimental results indicated that the optimum reaction conditions on the preparation of absorbent were the quality ratio of collagen fiber and HBPN was 1 : 0. 7, the dosage of crosslinking agent was 0. 533mL/gCF, the temperature was 40℃ , 4h. Under these conditions, the amino content of CF-HBPN was 3. 27 times higher than that of CF. Moreover, the absorbent prepared under these conditions was used in the treatment of solution contain Cr( VI), the removal rate was 99. 57%.