An investigation of post treatment on properties and structure of ultrahigh molecular weight polyethylene parts prepared by selective laser sintering for biomedical application
An investigation of post treatment on properties and structure of ultrahigh molecular weight polyethylene parts prepared by selective laser sintering for biomedical application
复制标题
选择性激光烧结生物医学应用超高分子量聚乙烯部件性能和结构后处理的研究
DOI：
10.1002/pat.4878
复制
发表时间：
2020-02
影响因子：
3.4
通讯作者：
Gong Pengjian
中科院分区：
文献类型：
--
作者：
Zhao Yinglun;Yang Qi;Ma Haoyu;Wu Pingping;Huang Yajiang;Gong Pengjian
结合选择性激光烧结（SLS）的定制化优势和超高分子量聚乙烯（UHMWPE）的优异性能，可以满足生物医用人工关节的要求。然而，UHMWPE熔体的高粘度限制了UHMWPE烧结部件的强度。从金属和陶瓷材料的启发，这项工作的目的是提高SLS制备的UHMWPE部件的性能，使用后处理方法，包括热处理和热等静压（HIP）处理。因此，与热处理相比，热等静压处理在提高UHMWPE烧结件性能方面显示出优越性。结合温度和等静压条件，提出了“粘结颈”的新定义，解释了不同后处理工艺对UHMWPE颗粒间粘结力的增强。在不添加任何强化剂的情况下，SLS人工关节的生物安全性得到了进一步的保证。在等静压12 MPa、热等静压185 ℃条件下进行热等静压处理，合金的力学强度、摩擦学性能等性能得到显著提高。试样的拉伸强度达8.0 MPa，断裂伸长率为99.3%，冲击强度为8.8 MPa，摩擦系数为0.11，磨损率为9.3 × 10 ~（-4）mm ~（3）/Nm，同时试样未显示细胞毒性。
Combined with customization advantage of selective laser sintering (SLS) and excellent performance of ultrahigh molecular weight polyethylene (UHMWPE), it is possible to meet the requirements of artificial joints for biomedical application. However, high viscosity of UHMWPE melt limits the strength of UHMWPE sintered parts. Inspired from metal and ceramic materials, this work aims to improve the performance of UHMWPE parts prepared by SLS using post treatment methods, including heat treatment and hot isostatic pressure (HIP) treatment. Consequently, HIP treatment shows superiority on promoting the performance of UHMWPE sintered parts compared with heat treatment. With the condition of temperature and isostatic pressure, a novel definition of "bonding neck" is given to explain the enhancement of cohesion between each UHMWPE particle in different post treatment. Without any fortifier, the biological safety of artificial joints manufactured by SLS is further guaranteed. Under the isostatic pressure of 12 MPa and temperature of 185 degrees C in HIP treatment, the mechanical strength, tribological performance and other properties are improved dramatically. The tensile strength of the specimen is up to 8.0 MPa, the elongation at break is 99.3%, the impact strength is 8.8 MPa, the friction coefficient is 0.11, the wear rate is 9.3 x 10(-4) mm(3)/Nm and samples do not show cytotoxicity at the same time.
登录
查看更多内容
DOI：
10.4028/www.scientific.net/amm.155-156.872
发表时间：
2012-02
期刊：
Applied Mechanics and Materials
影响因子：
--
作者：
Jun Su;Xiao Jing Li;P. Qu
通讯作者：
Jun Su;Xiao Jing Li;P. Qu
超高分子量聚乙烯与线性聚乙烯蜡混合物的拉伸行为和机械性能
影响因子：
4.6
作者：
Shen, Lihua;Severn, John;Bastiaansen, Cees W. M.
通讯作者：
Bastiaansen, Cees W. M.
DOI：
10.1002/1097-4636(2000)53:4
发表时间：
2000
期刊：
Journal of biomedical materials research
影响因子：
--
作者：
Allison A. Campbell;Lin Song;X. Shari Li;Bradley J. Nelson;Craig Bottoni;Dan E. Brooks;E. Schuyler DeJong
通讯作者：
Allison A. Campbell;Lin Song;X. Shari Li;Bradley J. Nelson;Craig Bottoni;Dan E. Brooks;E. Schuyler DeJong
DOI：
10.4028/www.scientific.net/amr.291-294.754
发表时间：
2011-07
期刊：
Advanced Materials Research
影响因子：
--
作者：
Chun Li;Ying Sun;L. Chen
通讯作者：
Chun Li;Ying Sun;L. Chen
影响因子：
5
作者：
Salmoria, G. V.;Lauth, V. R.;Magnago, R. F.
通讯作者：
Magnago, R. F.