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首页> 外文期刊>Journal of Materials Science >Piezoelectric properties of collagen-nanocrystalline hydroxyapatite composites
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Piezoelectric properties of collagen-nanocrystalline hydroxyapatite composites

机译:胶原-纳米晶羟基磷灰石复合材料的压电性能

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摘要

In this paper we did a study of the physicochemical, dielectric and piezoelectric properties of anionic collagen and collagen-hydroxyapatite (HA) composites, considering the development of new biomaterials which have potential applications in support for cellular growth and in systems for bone regeneration. The piezoelectric strain tensor element d 14, the elastic constant s 55, and the dielectric permittivity ɛ11 were measured for the anionic collagen and collagen-HA films. For the collagen-HA composite film (Col-HACOM) the main peaks associated to the crystalline HA is present. For the nanocrystalline composite, nanometric HA powder (103 nm particle size) (HAN), obtained by mechanical milling were used. For the composite film (Col-HAN) the HA and CaH(PO4)2H2O phases were detected. One can see that the HA powder (HAN) present the main peaks associated to crystalline HA. The IR spectroscopy measurements on HA-COM and HAN powders, Col-HACOM and Col-HAN composite films and collagen film (Col) presents the main resonances associated to the modes of (PO4)3−, (CO3)2−. The IR spectra of Collagen Film (Col) shows the bands associated to amide I (C=O), amide II (N–H) and amide III (C–N) vibrational modes. The scanning electron photomicrography of the Col-HACOM and Col-HAN films, respectively, shows deposits of HA on the surface of collagen. It also shows that HACOM crystals has a dense feature, whereas the HAN crystals has soft porous surface. Energy-dispersive spectroscopy (EDS) analysis showed that the main elements of the hybrid sponge were carbon, oxygen, calcium, and phosphorus. The EDS of HACOM crystal, present in the Col-HACOM composite showed a molar ratio Ca/P = 1.71, whereas the Col-HAN composite the molar ratio of calcium and phosphorus (Ca/P = 2.14) and the amount of carbon were greater. The piezoelectric strain tensor element d 14 obtained for the anionic collagen was around 0.102 pC/N. The collagen composite with nanocrystalline HA crystals (Col-HAN) present a better result (d 14 = 0.040 pC/N) compared to the composite with the commercial ceramic (d 14 = 0.012 pC/N). This is an indication that the nanometric particles of HA present little disturbance on the organization of the collagen fibers in the composite. In this situation the nanometric HA are the best candidates in future applications of these composites.
机译:在本文中,我们考虑了新型生物材料的开发,研究了阴离子胶原和胶原-羟基磷灰石(HA)复合材料的物理化学,介电和压电性能,这些材料在支持细胞生长和骨再生系统方面具有潜在的应用前景。测量了阴离子胶原和HA胶原膜的压电应变张量元件d 14 ,弹性常数s 55 和介电常数permit11 。对于胶原蛋白HA复合膜(Col-HACOM),存在与结晶HA相关的主峰。对于纳米晶体复合物,使用通过机械研磨获得的纳米HA粉末(粒径103nm)(HAN)。对于复合膜(Col-HAN),检测到了HA和CaH(PO4 )2 H2 O相。可以看到HA粉末(HAN)出现了与结晶HA相关的主峰。对HA-COM和HAN粉末,Col-HACOM和Col-HAN复合膜以及胶原膜(Col)的红外光谱测量显示出与(PO4 )3 − 的模式相关的主要共振, (CO3 )2-。胶原膜(Col)的红外光谱显示了与酰胺I(C = O),酰胺II(N–H)和酰胺III(C–N)振动模式相关的谱带。 Col-HACOM和Col-HAN膜的扫描电子显微照片分别显示了HA在胶原蛋白表面的沉积。它还显示HACOM晶体具有致密特征,而HAN晶体具有柔软的多孔表面。能量色散光谱法(EDS)分析表明,混合海绵的主要元素是碳,氧,钙和磷。 Col-HACOM复合材料中存在的HACOM晶体的EDS显示摩尔比Ca / P = 1.71,而Col-HAN复合材料中钙和磷的摩尔比(Ca / P = 2.14)和碳含量更大。阴离子胶原获得的压电应变张量元件d 14 约为0.102 pC / N。与具有商用陶瓷的复合材料(d 14 = 0.012 pC / N)相比,具有纳米晶HA晶体(Col-HAN)的胶原蛋白复合材料具有更好的结果(d 14 = 0.040 pC / N)。 。这表明HA的纳米颗粒对复合物中胶原纤维的组织几乎没有干扰。在这种情况下,纳米HA是这些复合材料未来应用的最佳选择。

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  • 来源
    《Journal of Materials Science》 |2002年第10期|2061-2070|共10页
  • 作者单位

    Departamento de Quimica Orgânica e Inorgânica UFC;

    Laboratório de Óptica não Linear e Ciência dos Materiais (LONLCM) Departamento de Física Universidade Federal do Ceará;

    Departamento de Bioquímica e Biologia Molecular Centro de Ciências UFC;

    Departamento de Engenharia Mecânica Centro de Tecnologia UFC;

    Laboratório de Óptica não Linear e Ciência dos Materiais (LONLCM) Departamento de Física Universidade Federal do Ceará;

    Laboratório de Óptica não Linear e Ciência dos Materiais (LONLCM) Departamento de Física Universidade Federal do Ceará;

    Laboratório de Óptica não Linear e Ciência dos Materiais (LONLCM) Departamento de Física Universidade Federal do Ceará;

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