HYDROPHOBICITY IMPROVEMENTS OF POLYMERS USED IN BIOMEDICAL APPLICATIONS.
HYDROPHOBICITY IMPROVEMENTS OF POLYMERS USED IN BIOMEDICAL APPLICATIONS.
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生物医学应用中聚合物的疏水性改进。
DOI：
10.1115/imece2022-95610
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Lokasani,VinayReddy
中科院分区：
文献类型：
--
作者：
Hossain,MohammadMotaher;Lokasani,VinayReddy
疏水性的改善对于用于各种应用（如生物医学应用）的聚合物很重要，因为它可以延迟由于长期暴露于潮湿环境而导致的降解。尽管多年来已经开发了许多表面改性技术来改善疏水性，但它们对疏水性增强以及长期机械和摩擦学性能的具体影响尚未完全了解。本研究通过在超高分子量聚乙烯（UHMWPE）和高密度聚乙烯（HDPE）表面引入不同类型和几何形状的表面织构，研究表面改性对其疏水性和长期机械摩擦学性能的影响。基于Wenzel和Cassie-Baxter模型的理论研究，在超高分子量聚乙烯（UHMWPE）和高密度聚乙烯（HDPE）表面上引入了不同类型和维度的表面纹理。结果表明，表面织构的引入显著提高了聚合物的疏水性。探讨了结构类型与几何结构之间的具体关系以及疏水性的改善。通过实验结果与理论模型的比较，过渡态模型似乎更适合描述表面纹理加入后疏水性的变化。该研究为提高高分子材料的疏水性提供了有益的指导。
Improvement in hydrophobicity is important for polymers used in various applications such as biomedical applications, as it can delay their degradation due to long-term exposure to moisture environments. Although a number of surface modification techniques have been developed over the years to improve hydrophobicity, their specific influences on hydrophobicity enhancement as well as long-term mechanical and tribological performances are yet to be fully understood. In this study, surface textures, with variation in type and geometry, are introduced on Ultrahigh Molecular Weight Polyethylene (UHMWPE) and High Density Polyethylene (HDPE) surfaces to study the effect of surface modification on hydrophobicity and long-term mechanical and tribological performances. Based on the theoretical study using Wenzel and Cassie-Baxter models, surface textures of various types and dimension are introduced on UHMWPE and HDPE surfaces. The results show that introduction of surface textures significantly improves the hydrophobicity of polymers. Specific relationship between texture type and geometry, and improvement in hydrophobicity is explored. Based on the comparison between experimental results and theoretical models, transition state modeling seems to be more suitable in describing the change in hydrophobicity with the addition of surface texture. The study provides useful guidelines to improve hydrophobicity of polymers for biomedical applications.
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DOI：
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