Mechanical and chemical modifications of polyethylene surface by ion implantation

J. D. Liao, J. Rieu, Y. Corre, L. M. Rabbe, L. Boudoukha, S. Paletto

Research output: Contribution to journalArticlepeer-review

Abstract

The hardness and the modulus of elasticity of PEs could be similarly enhanced by energy deposition of nitrogen ion implantation. With the dose of 1.4×1017 ions.cm-2, the nanohardness significantly increased 15 to 10 times and the modulus of elasticity did 7 to 5 times at the indentation depth starting from 30 to 100 nm. An important transformation from plastic to elastic behaviour was clearly observed. As a PE was ion-implanted with low dose, its outermost surface became polarizable and it was wettable with a polar liquid. The study of the joint movement also supported that the increase of wettability could spread the Ringer's solution and potentially lubricate the ball-on-cup movement; furthermore, the wear rate of the modified PE could be decreased by the formation of an elastic and hardened layer at the surface. The non-crosslinkable effect was studied by the destructive depth profile and ir-active vibration mode. The result showed that the carbonyl created at the dose higher than 1016 ions.cm-2 became rigid and stronglybonded and it was introduced to less than 10 nm of depth. The superficial N functionalities were little detected, probably they were recoiled after giving the energy to the target material or consumed by gas evolution.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalBiomedical Engineering - Applications, Basis and Communications
Volume6
Issue number4
Publication statusPublished - 1994 Jan 1

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Bioengineering
  • Biomedical Engineering

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