| LIU Ji-guang,WANG Li-ping,LI Mu-qin,ZANG Wan-shun,YANG Wan-cui.Preparation and Antibacterial Activity of Pure Magnesium Micro-arc Oxidation-Chitosan/Sodium Alginate Containing Copper Composite Coating[J],45(11):159-166 |
| Preparation and Antibacterial Activity of Pure Magnesium Micro-arc Oxidation-Chitosan/Sodium Alginate Containing Copper Composite Coating |
| Received:May 03, 2016 Revised:November 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.11.025 |
| KeyWord:pure magnesium micro-arc oxidation chitosan alginate copper antibacterial activity |
| Author | Institution |
| LIU Ji-guang |
Key Laboratory of Biomedical Materials of Heilongjiang Province Colleges, Jiamusi University, Jiamusi , China |
| WANG Li-ping |
Key Laboratory of Biomedical Materials of Heilongjiang Province Colleges, Jiamusi University, Jiamusi , China |
| LI Mu-qin |
Key Laboratory of Biomedical Materials of Heilongjiang Province Colleges, Jiamusi University, Jiamusi , China |
| ZANG Wan-shun |
Key Laboratory of Biomedical Materials of Heilongjiang Province Colleges, Jiamusi University, Jiamusi , China |
| YANG Wan-cui |
Key Laboratory of Biomedical Materials of Heilongjiang Province Colleges, Jiamusi University, Jiamusi , China |
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| Abstract: |
| The work aims to reduce degradation speed of medical pure magnesium and endow fixation materials in medical pure magnesium with antibacterial activity and biological activity by preparing functional composite coatings on the surface of pure magnesium by combining a variety of surface technologies. Different composite coatings, including pure magnesium micro-arc oxidation (MAO) coating (group A), pure magnesium MAO-chitosan composite coating (group B), pure magnesium MAO-chitosan/alginate composite coating (group C), pure magnesium MAO-chitosan/sodium alginate/chitosan composite coating (group D) and pure magnesium MAO-chitosan/alginate con-taining copper composite coating (group E), were made by pure magnesium micro-arc oxidation, electroplating of chitosan and sodium alginate and chemical plating copper. Microstructures of the composite coatings were analyzed by scanning electron microscopy (SEM). The wetting angles of the coatings were measured and the materials were co-cultured with Escherichia coli. After 24 hours, their bacteriostatic rates were calculated. The results indicated that there were many micropore and a few microcracks on the surface of group A, pores and microcracks on the surface of group B reduced, that on the surface of group C mostly disappeared while microcracks on the surface of group D and E totally disappeared and micro reticular structures appeared. The coatings in group A and E were hydrophilic; for group C, hydrophobic; for group B and group D, nearly hydrophobic. The antibacterial rate of group A was the lowest; that of group B, C and D, which was respectively 26%, 30% and 61%, increased gradually; that of group E was up to 88%. Pure magnesium MAO chitosan/sodium alginate containing copper composite coating can seal pores and heal cracks and is of good antibacterial activity. |
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