Ultrahigh molecular weight polyethylene surface gradient crosslinking method and application thereof

• Main Author: ZHANG ZONGTAO
• Format: Patent
• Language: Chinese; English
• Published: 15.08.2023
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; GENERAL PROCESSES OF COMPOUNDING; HUMAN NECESSITIES; HYGIENE; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention relates to an ultra-high molecular weight polyethylene surface gradient cross-linking method and application thereof. The ultra-high molecular weight polyethylene surface gradient cross-linking method comprises an ultra-high molecular weight polyethylene surface photoinitiator diffusion step and an ultraviolet light irradiation cross-linking step. According to the method, the photoinitiator is deeply diffused into the surface of the ultra-high molecular weight polyethylene, the body material is subjected to gradient crosslinking from the surface to the interior after ultraviolet irradiation, and super crosslinking is gradually converted into low-degree crosslinking or non-crosslinking, so that the whole body material has good toughness, and the surface has good wear resistance. 本发明涉及一种超高分子量聚乙烯表面梯度交联方法及其应用。该超高分子量聚乙烯表面梯度交联方法包括超高分子量聚乙烯表面光引发剂扩散步骤和紫外光辐照交联步骤。该方法将光引发剂深度扩散进入超高分子量聚乙烯表面，紫外辐照后体材从表面向内部呈现梯度交联，由超级交联逐步转为低度交联或非交联，使得体材整体具有良好的韧性且表面具有良好的耐磨性。