等离子活化烧结制备石墨烯/羟基磷灰石复相生物陶瓷

doi:10.15541/jim20180142

无机材料学报 ›› 2018, Vol. 33 ›› Issue (12): 1355-1359.DOI: 10.15541/jim20180142

等离子活化烧结制备石墨烯/羟基磷灰石复相生物陶瓷

张彪, 杨长安, 施佩

陕西科技大学材料科学与工程学院, 西安 710021

收稿日期:2018-04-02 修回日期:2018-04-26 出版日期:2018-12-20 网络出版日期:2018-11-27
作者简介:张彪(1990-), 男, 博士研究生. E-mail: yunzhuangzhb@163.com
基金资助:
陕西省科技统筹创新工程项目(2017TSCXL-GY-07-05, 2015KTTSGY02-03);陕西科技大学博士科研启动基金(2017BJ-26);陕西科技大学研究生创新基金项目

Synthesis of Graphene/Hydroxyapatite Composite Bioceramics via Plasma Activated Sintering

ZHANG Biao, YANG Chang-An, SHI Pei

School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China

Received:2018-04-02 Revised:2018-04-26 Published:2018-12-20 Online:2018-11-27
About author:ZHANG Biao. E-mail: yunzhuangzhb@163.com
Supported by:
Shaanxi Science & Technology Co-ordination & Innovation Project (2017TSCXL-GY-07-05, 2015KTTSGY02-03);Doctoral Scientific Research Fund of Shaanxi University of Science & Technology (2017BJ-26);Graduate Innovation Fund of Shaanxi University of Science and Technology

摘要/Abstract

摘要：

以羟基磷灰石(Hydroxyapatite, HAp)为基体, 石墨烯(Graphene, rGO)作为增强相, 利用等离子活化烧结制备了石墨烯/羟基磷灰石(rGO/HAp)复相生物陶瓷。系统研究了rGO添加量对HAp陶瓷基体物相结构、生物活性及断裂韧性的影响。结果表明, rGO的加入有利于提高HAp陶瓷的生物活性。同时, 复相生物陶瓷的硬度与断裂韧性随rGO添加量的增加均表现出先升高, 后显著降低的变化趋势。当rGO添加量为2wt%时, 样品的硬度与断裂韧性分别达到6.97 GPa和0.84 MPa•m^1/2, 较纯相HAp陶瓷提高了11.5%和37.3%。研究表明rGO的拔出效应是导致复相陶瓷力学性能提高的主要原因。

关键词: 羟基磷灰石, 石墨烯, 等离子活化烧结, 生物活性, 断裂韧性

Abstract:

Graphene/hydroxyapatite (rGO/HAp) composite bioceramics were fabricated by plasma activated sintering using hydroxyapatite (HAp) as matrix and graphene (rGO) as reinforced phase. The effects of rGO addition on phase structure, bioactivity and fracture toughness of HAp ceramics matrix were systematically investigated. The results indicate that the incorporation of rGO is beneficial to promoting the bioactivity of HAp ceramics. Meanwhile, hardness and fracture toughness of composite bioceramics initially increase and then decrease significantly with rGO concentration increasing. The hardness and fracture toughness of the specimen with rGO loading of 2wt% reach 6.97 GPa and 0.84 MPa•m^1/2, which display ~11.5% and ~37.3% improvements as compared to pure HAp ceramics, respectively. It is demonstrated that the pull-out effect of rGO is the major reason for enhancing the mechanical properties of composite ceramics.

Key words: hydroxapatite, graphene, plasma activated sintering, bioactivity, fracture toughness

中图分类号:

TB321

张彪, 杨长安, 施佩. 等离子活化烧结制备石墨烯/羟基磷灰石复相生物陶瓷[J]. 无机材料学报, 2018, 33(12): 1355-1359.

ZHANG Biao, YANG Chang-An, SHI Pei. Synthesis of Graphene/Hydroxyapatite Composite Bioceramics via Plasma Activated Sintering[J]. Journal of Inorganic Materials, 2018, 33(12): 1355-1359.

图/表 7

图1 rGO/HAp复相生物陶瓷的光学照片及断口SEM照片

Fig. 1 Optical photos (insets) and SEM images of fracture surface of rGO/HAp composite bioceramics(a) Pure HAp; (b) 1wt% rGO/HAp; (c) 2wt% rGO/HAp; (d) 5wt% rGO/Hap

图2 rGO/HAp复相生物陶瓷的XRD图谱

Fig. 2 XRD patterns of rGO/HAp composite bioceramics

图3 rGO/HAp复相生物陶瓷的Raman光谱图

Fig. 3 Raman spectra of rGO/HAp composite bioceramics

图4 2wt% rGO/HAp复相生物陶瓷的断口SEM照片及EDS图谱

Fig. 4 SEM images and EDS spectra of fracture surface of 2wt% rGO/HAp composite bioceramics(a) SEM images; (b) EDS spectra; Elemental mappings of (c) Ca, (d) P, and (e) C elements

图5 rGO/HAp复相生物陶瓷表面矿化产物的LSCM照片

Fig. 5 LSCM images of mineralization products on the surface of rGO/HAp composite bioceramics(a) Pure HAp; (b) 1wt% rGO/HAp; (c) 2wt% rGO/HAp; (d) 5wt% rGO/HAp

图6 2wt% rGO/HAp复相生物陶瓷表面沉积物的SEM照片

Fig. 6 SEM images of deposition on the surface of 2wt% rGO/HAp composite bioceramics(a) Morphology of the surface sediment after mineralization; (b) Partial enlarged drawing

图7 rGO/HAp复相生物陶瓷维氏硬度与断裂韧性变化曲线

Fig. 7 Vickers hardness and fracture toughness of rGO/HAp composite bioceramics

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等离子活化烧结制备石墨烯/羟基磷灰石复相生物陶瓷

Synthesis of Graphene/Hydroxyapatite Composite Bioceramics via Plasma Activated Sintering

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