原位沉析法制备有序排列四氧化三铁/壳聚糖纳米复合材料的研究

生物矿物由于具有完美结构及独特的生物活性，使其成为制备新型有彬无机杂化纳米复合材料的思想来源，在目前制备的有机／无机纳米复合材料中，纳米粒子在聚合物基质中大部分是无规分散的，但无机纳米颗粒在有机物中的有序排列是生命体中的一种根本体现，有序排列会使材料的性能更加优异。人骨的主要成分是纳米羟基磷灰石晶体和胶原，羟基磷灰石晶体是沿着胶原纤维的长轴方向有序排列的，这使得人骨不仅具有生物活性，而且具有非常好的力学性能。

Preparation of Orientated Magnetite/Chitosan Nano-composite Material via In-situ Precipitation

Because of biominerals,controlled morphology and unique properties,biominerals become the idea headspring for making organic-inorganic hybrid composite with new patterns.The preferred orientation phenomena of minerals on bioorganics are frequently observed in organisms,this can make the material's performances become better,the human bone is a good example.By now,in most of the prepared nano-composites,the nano-particles dispersed randomly in polymer matrix.In this paper,magnetic/chitosan nano-composite in the magnetic environment was prepared via in-situ precipitation.From the XRD,TEM testing results,it can be concluded that nano magnetite particles arranged orderly in the chitosan matrix,the average diameter of the particles is about 11.3 nm.This provides a new method for preparing three-dimensional magnetic biomaterial,and has broad potential application to the bone repair field.