n-HA添加对聚磷酸钙水凝胶结构与性能的影响  

Effect of n-HA Addition on the Structure and Properties of Calcium Polyphosphate Hydrogel

作　　者：周苗 汪涛[1] 黄卫星 吴小玉 袁揭 黄文静 ZHOU Miao;WANG Tao;HUANG Wei-xing;WU Xiao-yu;YUAN Jie;HUANG Wen-jing(School of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学材料科学与技术学院

出　　处：《硅酸盐通报》2019年第6期1743-1747,1754,共6页Bulletin of the Chinese Ceramic Society

摘　　要：采用共混法制备纳米羟基磷灰石/聚磷酸钙(n-HA/CPP)复合水凝胶,探究了n-HA的添加对CPP水凝胶的结构形貌、热稳定性、溶胀降解性能和力学性能的影响。结果表明:通过控制n-HA的添加量可以改变CPP水凝胶的链长进而改变其性能,n-HA的加入提高了CPP水凝胶的热稳定性。随着n-HA添加量的增加,n-HA/CPP复合水凝胶的溶胀率和降解率均呈现先减小后增大再减小的趋势,溶胀后内部孔洞大小也呈现先减后增再减的变化规律。添加量为1wt%时,n-HA/CPP复合水凝胶的抗压强度达到最大值(5.06±0.60)MPa,与纯CPP水凝胶相比提高了22%。The nano-hydroxyapatite/calcium polyphosphate (n-HA/CPP) composite hydrogels were prepared by blending method. The influence of n-HA addition on the structure, morphology, thermal stability, swelling properties and mechanical properties of the CPP hydrogel was investigated. The results show that by controlling the amount of n-HA, the chain length of CPP hydrogel can be adjusted and the properties can be further changed. The addition of n-HA improves the thermal stability of CPP hydrogel. With the increase of n-HA addition, the swelling ratio and degradation ratio of n-HA/CPP composite hydrogels initially decreases, then increases and finally decreases, as well as the size of internal pores after swelling varied following a similar way. At the amount of addition is 1wt%, n-HA/CPP composite hydrogel reaches the maximum compressive strength (5.06±0.60) MPa, 22% higher than that of the pure CPP hydrogel.

关 键 词：聚磷酸钙 羟基磷灰石 复合水凝胶 

分 类 号：TB321[一般工业技术—材料科学与工程]