3D打印琼脂糖和海藻酸钠复合水凝胶组织与性能研究
Microstructure and properties of 3D printed agarose and sodium alginate composite hydrogel
查看参考文献21篇
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文摘
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组织工程支架要求材料具有良好的生物相容性、相匹配的力学性能,以及利于细胞生长繁殖的形貌和结构。尽管人们已经开发出了大量生物材料用于制备组织工程支架,然而,组织工程支架的成形困难和力学性能差等问题仍然严重限制着其发展。以海藻酸钠为原材料,通过添加琼脂糖增强其力学性能,研究不同比例海藻酸钠/琼脂糖复合凝胶的结构和形貌变化,测试其力学性能。利用直写打印成形复合水凝胶支架,观察复合凝胶中微观孔隙的大小。结果表明:不同比例的海藻酸钠/琼脂糖复合凝胶含水量差异较小,均在90%附近。除了纯琼脂糖凝胶和体积比为1:2的复合凝胶外,其他比例的复合凝胶表面和断面均比较粗糙。琼脂糖能在一定程度上增强复合凝胶,海藻酸钠与琼脂糖的体积比2:1的复合凝胶压缩模量最高,可达0.353MPa。碳酸钙的分解在复合凝胶中产生了亚微米级的孔隙,因此制备出的复合凝胶具有适合细胞生长繁殖的粗糙表面和微观孔隙。 |
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其他语种文摘
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The biological scaffolds of tissue engineering are required to have good biocompatibility,matched mechanical properties,as well as morphology and microstructure for cell growth and reproduction.Although a large number of biomaterials have been developed to prepare tissueengineering scaffolds,the forming problems and poor mechanical properties of the scaffolds still seriously limit the development of tissue engineering.The sodium alginate was used as raw material,and its mechanical properties were enhanced by agarose.The structure and morphology of sodium alginate/agarose composite hydrogels with different ratios were studied,the mechanical properties were tested.In addition,the composite hydrogel scaffold was formed by direct ink writing,and the size of the microscopic pores in composite hydrogels were designed and observed.The results show that the composite hydrogels with different ratios have little difference in water content,all around 90%.Apart from the pure agarose gel and the composite gel with a volume ratio of 1:2,the surface and cross section of the composite gel in other ratios are relatively rough.Agarose can enhance the composite gel to a certain extent,and the composite gel with the volume ratio of sodium alginate to agarose of 2:1 has the highest compression modulus,which can reach 0.353 MPa.The decomposition of calcium carbonate created submicron pores in the composite hydrogel,therefore the prepared composite hydrogel has rough surface and micro-pores,which is conducive for cell growth and reproduction. |
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来源
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材料工程
,2021,49(5):66-74 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2020.000011
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关键词
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组织工程支架
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海藻酸钠
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琼脂糖
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3D打印
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力学性能
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微观孔隙
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地址
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华中科技大学, 材料成形与模具技术国家重点实验室, 武汉, 430074
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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一般工业技术 |
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基金
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华中科技大学青年前沿学术团队项目
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文献收藏号
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CSCD:6973163
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