Journal
MOLECULES
Volume 22, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/molecules22040511
Keywords
diopside; silane coupling agent; interface adhesion; bioactivity; scaffolds
Funding
- Natural Science Foundation of China [51575537, 81572577]
- Overseas, Hong Kong & Macao Scholars Collaborated Researching Fund of National Natural Science Foundation of China [81428018]
- Hunan Provincial Natural Science Foundation of China [14JJ1006, 2016JJ1027]
- Project of Innovation-driven Plan of Central South University [2015CXS008, 2016CX023]
- Open-End Fund for the Valuable and Precision Instruments of Central South University
- State Key Laboratory for Powder Metallurgy
- Fundamental Research Funds for the Central Universities of Central South University
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Diopside (DIOP) was introduced into polyetheretherketone/polyglycolicacid (PEEK/PGA) scaffolds fabricated via selective laser sintering to improve bioactivity. The DIOP surface was then modified using a silane coupling agent, 3-glycidoxypropyltrimethoxysilane (KH570), to reinforce interfacial adhesion. The results showed that the tensile properties and thermal stability of the scaffolds were significantly enhanced. It could be explained that, on the one hand, the hydrophilic group of KH570 formed an organic covalent bond with the hydroxy group on DIOP surface. On the other hand, there existed relatively high compatibility between its hydrophobic group and the biopolymer matrix. Thus, the ameliorated interface interaction led to a homogeneous state of DIOP dispersion in the matrix. More importantly, an in vitro bioactivity study demonstrated that the scaffolds with KH570-modified DIOP (KDIOP) exhibited the capability of forming a layer of apatite. In addition, cell culture experiments revealed that they had good biocompatibility compared to the scaffolds without KDIOP. It indicated that the scaffolds with KDIOP possess potential application in tissue engineering.
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