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含有聚乙二醇和羟基磷灰石的超高分子量聚乙烯生物活性复合材料的力学、流变学和生物活性特性。

Mechanical, rheological, and bioactivity properties of ultra high-molecular-weight polyethylene bioactive composites containing polyethylene glycol and hydroxyapatite.

作者信息

Ahmad Mazatusziha, Uzir Wahit Mat, Abdul Kadir Mohammed Rafiq, Mohd Dahlan Khairul Zaman

机构信息

Department of Polymer Engineering, Faculty of Chemical Engineering, Universiti Teknologi Malaysia, Johor, 81310 Skudai, Malaysia.

出版信息

ScientificWorldJournal. 2012;2012:474851. doi: 10.1100/2012/474851. Epub 2012 Apr 30.

DOI:10.1100/2012/474851
PMID:22666129
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3361308/
Abstract

Ultrahigh-molecular-weight polyethylene/high-density polyethylene (UHMWPE/HDPE) blends prepared using polyethylene glycol PEG as the processing aid and hydroxyapatite (HA) as the reinforcing filler were found to be highly processable using conventional melt blending technique. It was demonstrated that PEG reduced the melt viscosity of UHMWPE/HDPE blend significantly, thus improving the extrudability. The mechanical and bioactive properties were improved with incorporation of HA. Inclusion of HA from 10 to 50 phr resulted in a progressive increase in flexural strength and modulus of the composites. The strength increment is due to the improvement on surface contact between the irregular shape of HA and polymer matrix by formation of mechanical interlock. The HA particles were homogenously distributed even at higher percentage showed improvement in wetting ability between the polymer matrix and HA. The inclusion of HA enhanced the bioactivity properties of the composite by the formation of calcium phosphate (Ca-P) precipitates on the composite surface as proven from SEM and XRD analysis.

摘要

使用聚乙二醇（PEG）作为加工助剂和羟基磷灰石（HA）作为增强填料制备的超高分子量聚乙烯/高密度聚乙烯（UHMWPE/HDPE）共混物，通过传统的熔融共混技术被发现具有高度可加工性。结果表明，PEG显著降低了UHMWPE/HDPE共混物的熔体粘度，从而提高了挤出性。随着HA的加入，机械性能和生物活性性能得到改善。加入10至50 phr的HA导致复合材料的弯曲强度和模量逐渐增加。强度增加是由于通过形成机械互锁改善了HA不规则形状与聚合物基体之间的表面接触。即使在较高百分比下，HA颗粒也均匀分布，聚合物基体与HA之间的润湿性得到改善。SEM和XRD分析证明，HA的加入通过在复合材料表面形成磷酸钙（Ca-P）沉淀增强了复合材料的生物活性性能。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f87/3361308/0b13e2fff513/TSWJ2012-474851.012.jpg

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