Porous Shish-Kebab Structure Prepared from Oriented UHMWPE Films by Processing in Supercritical CO_(2)  

作　　者：Sergey A.Lermontov Aleksey V.Maksimkin Nataliya A.Sipyagina Tarek Dayyoub Alena N.Malkova Evgeniy A.Kolesnikov Elena A.Straumal Inna O.Gozhikova Saidkhodzha G.Nematulloev Dmitry V.Telyshev 

机构地区：[1]Institute of Physiologically Active Compounds of the Russian Academy of Sciences,Chernogolovka 142432,Russia [2]Institute for Bionic Technologies and Engineering,I.M.Sechenov First Moscow State Medical University(Sechenov University),Moscow 19991,Russia [3]National University of Science and Technology"MISIS"Moscow 119049,Russia [4]Institute of Biomedical Systems,National Research University of Electronic Technology,Zelenograd,Moscow 124498,Russia

出　　处：《Chinese Journal of Polymer Science》2024年第1期97-104,I0009,共9页高分子科学（英文版）

基　　金：financially supported by the Academic leadership program Priority 2030 proposed by Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University);The preparation and modification of UHMWPE samples were financially supported by the Russian Science Foundation (No.18-13-00145);SEM investigation was supported by the State Assignment (No.0090-2019-0002, IPAC RAS)。

摘　　要：For the first time, a highly crystalline porous shish-kebab structure with a high degree of crystallinity was obtained by using a combination of two methods for the formation of porous polymeric materials. A treatment procedure using supercritical carbon dioxide(sc CO_(2))was carried out for oriented ultrahigh molecular weight polyethylene(UHMWPE) films, which provided special conditions for the crystallization of dissolved UHMWPE macromolecules on the surface of oriented UHMWPE crystals. The prepared porous materials were investigated by scanning electron microscopy(SEM) and differential scanning calorimetry(DSC). The particularity of the obtained porous shish-kebab is the absence of the amorphous phase between lamellar crystals(kebabs). The obtained pores had an oval shape, and they were oriented in the orientation direction of the UHMWPE macromolecules. The pore size ranged from 0.05 μm to 4 μm. Controlling the conditions for the crystallization of the UHMWPE macromolecules using supercritical CO_(2) gives the possibility to control the size of both lamellar disks and pores formed.

关 键 词：UHMWPE Supercritical CO_(2) Porous shish-kebab structure 

分 类 号：TB383.2[一般工业技术—材料科学与工程]