Surface Modification on Property of Mesoporous Calcium Magnesium Silicate/Polyetheretherketone Composites

doi:10.15541/jim20170120

Abstract

Abstract:

Mesoporous calcium magnesium silicate (m-MCS)/polyetheretherketone (PK) bioactive composites for bone repair were prepared, and the surfaces of composites were modified by sanding and sandblasting treatment. The surface roughness of the composites modified by sandblasting was R_a=4.552 while the surface roughness of the composites modified by sanding were 1.727 and 2.103, which were higher than that of the untreated composites (1.359). In addition, the water contact angle of the composites treated by sandblasting was 54.1° while the water contact angles of the composites modified by sanding were 76.3° and 71.6°, which were higher than that of the untreated composites (81.2°). The results indicated that surface roughness and hydrophilicity of composites were significantly enhanced by sandblasting treatment. Porous surface structure and a large number of mesoporous calcium magnesium silicates were exposed on the composites surfaces after sandblasting treatment, resulted in the maximum surface roughness and hydrophilicity. After immersed in simulated body fluid (SBF) solution for 7 d, massive apatites were formed on the composites surfaces, showing a good bioactivity. The in vitro cell experiments indicated that the surface modified composites could significantly promote adhesion, proliferation and differentiation of MC3T3-E1 cells on the surfaces. Therefore, sandblasting treatment could significantly improve the biological performances of the composites as compared with sanding treatment.

Key words: mesoporous calcium magnesium silicate, polyetheretherketone, composite, surface modification, surface properties

CLC Number:

TB383

SHI Zhang-Yu, LI Quan, TANG Song-Chao, QIAN Jun, PAN Yong-Kang, WEI Jie. Surface Modification on Property of Mesoporous Calcium Magnesium Silicate/Polyetheretherketone Composites[J]. Journal of Inorganic Materials, 2018, 33(1): 67-74.

Figures/Tables 9

Fig. 1 TEM image (a) and EDS spectrum (b) of m-MCS

Fig. 2 SEM images ((a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb) and XRD patterns (e) of the composites after surface modification

Fig. 3 Laser microscope 2D images of the surface modified composites^(a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb

Fig. 4 Laser microscope 3D images of the surface modified composites^(a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb

Table 1 Surface roughness and water contact angle of the surface modified composites

Samples	R_a/µm	Water contact angle/(°)
MPC	1.359	81.2
MPC8	1.727	76.3
MPC4	2.103	71.6
MPCsb	4.552	54.1

Fig. 5 SEM images of the surface modified composites soaked in SBF for 7 d ^(a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb and (e) EDS spectrum of MPCsb

Fig. 6 Changes of ion (Ca,P and Si) concentrations for the surface modified composites soaked in SBF solution for different periods^(a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb

Fig. 7 CLSM photos of MC3T3-E1 cells cultivated on the surface modified composites for 72 h^(a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb

Fig. 8 Cell proliferation (A) and ALP activity (B) of MC3T3- E1 cells on the surface modified composites ^(a) MPC; (b) MPC8; (c) MPC4; (d) MPCsb for different periods

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