Morphology, hydrogen-bonding and crystallinity of nano-hydroxyapatite/polyamide 66 biocomposites
Morphology, hydrogen-bonding and crystallinity of nano-hydroxyapatite/polyamide 66 biocomposites
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DOI：
10.1016/j.compositesa.2006.08.002
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发表时间：
2007-03
影响因子：
8.7
通讯作者：
Xiang Zhang;Yubao Li;Y. Zuo;G. Lv;Yuan-hua Mu;Hong Li
中科院分区：
文献类型：
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作者：
Xiang Zhang;Yubao Li;Y. Zuo;G. Lv;Yuan-hua Mu;Hong Li
采用乙醇共沉淀法制备了纳米羟基磷灰石（n-HA）/聚酰胺66复合材料。研究了复合材料的结构与性能之间的关系。红外光谱分析结果表明，n-HA与PA 66之间主要以氢键方式连接，氢键主要存在于n-HA的羟基与PA 66的酰胺之间。X射线衍射结果表明，n-HA的引入削弱了PA 66中α2晶型的结晶度，复合材料中PA 66以α1晶型为主。差示扫描量热分析表明，复合材料中有机相与无机相之间的氢键作用增强了成核点，起到了成核剂的作用，从而提高了PA 66在复合材料中的成核速度。但随着n-HA含量的增加，复合材料中PA 66的相对结晶度降低（纯PA 66的结晶度为27.67%，30 wt % n-HA/PA 66和40 wt % n-HA/PA 66的平均粘度分别为23.44%和22.98%），这是由于n-HA的加入和n-HA/PA 66之间的氢键作用导致体系粘度增加所致。HA和PA 66。
Nano-composites for load-bearing bone repair consisting of nano-hydroxyapatite (n-HA) and polyamide 66 were prepared by co-precipitation in ethanol. The relationships between structure and property of the composites were studied. Infrared spectrum results showed that n-HA and PA66 were mainly linked by hydrogen-bonding, which mainly existed between OH of n-HA and amide of PA66. The X-ray diffraction results revealed that the introduction of n-HA to polymeric matrix would weaken the crystallinity of α2 crystals in PA66, and most of the PA66 crystals in the composite were α1 crystals. A differential scanning calorimetry pattern showed that the hydrogen-bonding between organic and inorganic phases in the composite enhanced nucleation spots and played the role of nucleating agent, which resulted in the increase of nucleating speed of PA66 in the composite. However, the relative crystalline degree of PA66 in the composite decreased with the increase of the content of n-HA (the degrees of crystallinity were 27.67% for pure PA66, 23.44% for 30wt% n-HA/PA66 and 22.98% for 40wt% n-HA/PA66) because of the high viscosity of the system caused by the addition of n-HA and the hydrogen-bonding between n-HA and PA66.