嫁接
材料科学
丙烯酸
聚乙烯
超高分子量聚乙烯
接触角
产量(工程)
化学工程
高分子化学
氢氧化钠
核化学
X射线光电子能谱
复合材料
共聚物
化学
聚合物
工程类
作者
Honglong. Wang,Lu Xu,Rong Li,Lijuan Pang,Jiangtao Hu,Mouhua. Wang,Guozhong Wang
标识
DOI:10.1016/j.apsusc.2016.03.175
摘要
The surface properties of ultra-high molecular weight polyethylene (UHMWPE) are very important for its use in engineering or composites. In this work, hydrophilic UHMWPE powder and film were prepared by γ-ray pre-irradiation grafting of acrylic acid (AA) and further neutralization with sodium hydroxide solution. Variations in the chemical structure, grafting yield and hydrophilicity were investigated and compared. FT-IR and XPS analysis results showed that AA was successfully grafted onto UHMWPE powder and film; the powder was more suitable for the grafting reaction in 1 wt% AA solution than the film. Given a dose of 300 kGy, the grafting yield of AA was ∼5.7% for the powder but ∼0.8% for the film under identical conditions. Radiation grafting of a small amount of AA significantly improved the hydrophilicity of UHMWPE. The water contact angle of the UHMWPE-g-PAA powder with a grafting yield of AA at ∼5.7% decreased from 110.2° to 68.2°. Moreover, the grafting powder (UHMWPE-g-PAA) exhibited good dispersion ability in water.
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