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首页> 外文期刊>Materials Letters >Photo-crosslinking polymerization to prepare polyanhydride/ needle-like hydroxyapatite biodegradable nanocomposite for orthopedic application
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Photo-crosslinking polymerization to prepare polyanhydride/ needle-like hydroxyapatite biodegradable nanocomposite for orthopedic application

机译:光交联聚合制备用于骨科应用的聚酸酐/针状羟基磷灰石可生物降解纳米复合材料

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摘要

The biodegradable nanocomposite of poly(methacrylated pyromellitylimidoalanine) (PM(PMA-ala)) and hydroxyapatite (HAp) was prepared by dispersing nanosized needle-like HAp particles prepared by homogeneous precipitation under hydrothermal condition into the crosslinked PM(PMA-ala) network via in-situ photo-polymerization. The conversion of carbon carbon double bonds of multifunctional anhydride monomers after the heat treatment can be over 90%, and the HAp needles are distributed homogeneously in the PM(PMA-ala) crosslinking network. By increasing the content of HAp, the mechanical properties of HAp/PM(PMA-ala) nanocomposite is improved two to three times those of PM(PMA-ala) itself. Furthermore, in contrast with PM(PMA-ala), the nanocomposite HAp/PM(PMA-ala) has higher modulus retention and lower mass loss at the same degradation time, and this tendency will be enhanced as the increase of the content of HAp.
机译:通过将在水热条件下均相沉淀制备的纳米针状HAp颗粒通过水分散到交联的PM(PMA-ala)网络中,从而制备出可生物降解的聚甲基丙烯酸吡咯并咪唑丙氨酸(PM(PMA-ala))和羟基磷灰石(HAp)纳米复合材料。原位光聚合。热处理后,多官能酸酐单体的碳-碳双键转化率可超过90%,HAp针均匀分布在PM(PMA-ala)交联网络中。通过增加HAp的含量,HAp / PM(PMA-ala)纳米复合材料的机械性能提高了PM(PMA-ala)本身的机械性能的2至3倍。此外,与PM(PMA-ala)相比,纳米复合材料HAp / PM(PMA-ala)在相同降解时间具有较高的模量保持力和较低的质量损失,并且随着HAp含量的增加,这种趋势将增强。 。

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