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首页> 外文期刊>Acta biomaterialia >Porous scaffold of gelatin-starch with nanohydroxyapatite composite processed via novel microwave vacuum drying.
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Porous scaffold of gelatin-starch with nanohydroxyapatite composite processed via novel microwave vacuum drying.

机译：明胶-淀粉与纳米羟基磷灰石复合材料的多孔支架，通过新型微波真空干燥处理。

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摘要

Hydroxyapatite (HA) is a fundamental mineral-based biomaterial, used for preparing composites for bone repair and regeneration. Gelatin blended with starch results in scaffold composites with enhanced mechanical properties. A gelatin-starch blend reinforced with HA nanocrystals (nHA) gave biocompatible composites with enhanced mechanical properties. In this study, a porous scaffold of gelatin-starch-nHA composites was fabricated through microwave vacuum drying and crosslinking using trisodium citrate. Three different composite scaffolds were prepared at three different percentages of nHA: 20%, 30% and 40%. The microstructures and compositions of the composites were analyzed. Within the porous structure, the nHA crystals were observed to precipitate. The interaction between the gelatin-starch network film and nHA crystalline material was studied using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction analysis (XRD). XRD reflections showed that there are two different minerals present in the scaffold composite. There were strong reflection peaks close to the 26 degrees and 32 degrees 2theta angles of HA, and close to the 8 degrees and 49 degrees 2theta angles for sodium citrate minerals. The FTIR result suggested that carboxyl groups, CO and amino groups play crucial roles in HA formation on the surface of a gelatin network.
机译：羟基磷灰石（HA）是一种基本的基于矿物的生物材料，用于制备用于骨修复和再生的复合材料。明胶与淀粉共混可得到具有增强机械性能的脚手架复合材料。用HA纳米晶体（nHA）增强的明胶-淀粉共混物可提供具有增强的机械性能的生物相容性复合材料。在这项研究中，明胶-淀粉-nHA复合材料的多孔支架是通过微波真空干燥和使用柠檬酸三钠的交联制备的。制备了三种不同的nHA百分比不同的复合支架：20％，30％和40％。分析了复合材料的微观结构和组成。在多孔结构内，观察到nHA晶体沉淀。明胶-淀粉网络薄膜和nHA晶体材料之间的相互作用是使用傅立叶变换红外（FTIR）光谱和X射线衍射分析（XRD）研究的。 X射线衍射表明支架复合材料中存在两种不同的矿物质。在HA的26度和32度2θ角附近以及柠檬酸钠矿物质的8度和49度2θ角附近都有强反射峰。 FTIR结果表明，羧基，CO和氨基在明胶网络表面HA形成中起关键作用。

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