Tan Guoxin
,
Ouyang Kongyou
,
Wang Hang
,
Zhou Lei
,
Wang Xiaolan
,
Liu Yan
,
Zhang Lan
,
Ning Chengyun
材料科学技术（英文）
doi:10.1016/j.jmst.2016.07.012
The objective of this study was to determine the role of functional groups of silane coupling on bioactive titanium (Ti) surface by electrochemical deposition, and calcium phosphate (CaP) coating, as well as bone cell adhesion and proliferation. Methyl group (—CH3), amino group (—NH2), and epoxy group (—glyph name—C(O)C) were introduced onto the bioactive Ti surface using self-assembled monolayers (SAMs) with different silane coupling agents as molecular bridges. The effect of the surface functional groups on the growth features of the CaP crystals was analyzed (including chemical compositions, element content, minerals morphology and crystal structure etc.). CH3-terminated SAMs showed a hydrophobic surface and others were hydrophilic by contact angle measurement; NH2-terminated SAMs showed a positive charge and others were negatively charged using zeta-potential measurement. Scanning electron microscopy results confirmed that flower-like structure coatings consisting of various pinpoint-like crystals were formatted by different functional groups of silane coupling, and the CaP coatings were multicrystalline consisting of hydroxyapatite (HA) and precursors. CaP coating of CH3-terminated SAMs exhibited more excellent crystallization property as compared to coatings of —NH2 and —C(O)C groups. In vitro MC3T3-E1 cells adhesion and proliferation were performed. The results showed that CaP coatings on silane coupling functionalized surfaces supported cell adhesion and proliferation. Thus, these functional groups of silane coupling on Ti can form homogeneous and oriented nano-CaP coatings and provide a more biocompatible surface for bone regeneration and biomedical applications.
关键词:
Silane coupling
,
Molecular bridge
,
Calcium phosphate coatings
,
Titanium
,
Electrochemical deposition
Journal of Materials Research
The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic ...
关键词:
room-temperature
Xiaoguang LIU
,
Xiaowei WANG
材料科学技术（英文）
The effect of interstitial hydrogen on the cohesion of the Al ∑=11(113) grain boundary (GB) is investigated based on the thermodynamic model of Rice-Wang using the first-principles density function calculation. The results indicate that interstitial H behaves as an emb...
关键词:
Hydrogen
,
null
,
null
钢铁
越来越多的企业认识到共同担负环境保护职责的重要性,诸如气候变化之类的全球环境问题已经成为钢铁工业能否保持竞争力的关键因素.在过去的世纪里,钢铁企业把环境治理的重心放在末端治理上,通过减少废物排放和提高副产品的循环率来减少工业活动对环境的影响.现在则通过努力开发环境友好的生产工艺,以节约能源、减少废物...
关键词:
钢铁工业
,
环境保护
,
FINEX
,
薄带连铸
