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首页> 外文期刊>Journal of Materials Chemistry, B. materials for biology and medicine >Hollow hydroxyapatite/polyelectrolyte hybrid microparticles with controllable size, wall thickness and drug delivery properties
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Hollow hydroxyapatite/polyelectrolyte hybrid microparticles with controllable size, wall thickness and drug delivery properties

机译:具有可控制的尺寸,壁厚和药物递送特性的中空羟磷灰石/聚电解质杂化微粒

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摘要

Hybrid hydroxyapatite (HAP) microparticles with a hollow HAP core and a chitosan/hyaluronic acid (CHI/HA) multilayer shell were fabricated via the hydrothermal method and the layer-by-layer (LbL) self-assembly technique. Depending on the hydrothermal reaction time, the thickness of the HAP shell could be controlled and the size of the hybrid hollow microparticles varied between 850 nm and 2 mu m. The size and HAP shell thickness significantly affect the drug release property of the resulting hybrid microparticles. The DOX release results demonstrated that CHI/HA multilayers could potentially assuage the initial burst release of drug from the porous HAP matrix because the polymer multilayer shell acted as a barrier to control the exchange of the drug. In addition, the drug release of hollow hybrid HAP microparticles was pH-dependent because of the different electrostatic interaction in the CHI/HA multilayers at different pH values and the dissolution of the HAP hollow core under acidic conditions. The present paper provides a facile and green route for the fabrication of hierarchical hybrid drug carriers with controllable size, wall thickness and drug release properties by combining natural polyelectrolytes and hollow HAP microparticles, which is highly attractive for controllable drug delivery.
机译:通过水热法和逐层(LbL)自组装技术,制备了具有空心HAP核和壳聚糖/透明质酸(CHI / HA)多层壳的杂化羟基磷灰石(HAP)微粒。取决于水热反应时间,可以控制HAP壳的厚度,杂化中空微粒的大小在850 nm和2μm之间变化。 HAP壳的大小和厚度显着影响所得杂化微粒的药物释放性能。 DOX释放结果表明,CHI / HA多层膜可以潜在地缓解药物从多孔HAP基质中的爆发性释放,因为聚合物多层壳充当了控制药物交换的屏障。此外,中空杂化HAP微粒的药物释放是pH依赖性的,因为在不同pH值下CHI / HA多层膜中的静电相互作用不同,并且HAP中空核在酸性条件下溶解。本文通过结合天然聚电解质和中空HAP微粒,为制造具有可控制的尺寸,壁厚和药物释放特性的分层混合药物载体提供了一条简便而绿色的途径,这对于可控药物的输送具有很高的吸引力。

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