OPOMNIK: IJS KOLOKVIJ,sreda, 04. 06. 2014; ob 13. uri; prof. dr. Kazuki Nakanishi

[Tanja Debevec]

Vabimo vas na 21. predavanje iz sklopa "Kolokviji na IJS" v letu 2013/14, ki bo v sredo, 04. junija 2014, ob 13. uri v Veliki predavalnici Instituta »Jožef Stefan«  na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu http://www.ijs.si/ijsw/Koledar_prireditev, posnetke preteklih predavanj pa na http://videolectures.net/kolokviji_ijs. 

 

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prof. dr. Kazuki Nakanishi

Oddelek za kemijo, Univerza v Kjotu, Kjoto, Japonska

 

Hierarhični porozni materiali: Priprava in uporaba pri znanosti o separaciji

 

S fazno separacijo v kemijsko zamreženih sistemih, ki jo induciramo s polimerizacijo, lahko izdelamo hierarhične porozne monolitne materiale z zelo raznovrstno kemijsko sestavo od kovinskih oksidov in hibridnih materialov na osnovi metaloksanov do povsem organskih polimerov. Izdelali smo monolitne kolone različnih premerov in dolžin iz čistega silicijevega dioksida, ki so že na voljo na trgu. Zaradi možnosti neodvisnega spreminjanja premera makropor in debeline mreže v gelu je mogoče pripraviti kolone, ki imajo pri kar najmanjši razliki tlakov karseda veliko sposobnost separacije. V zelo velikih monolitih lahko uporabimo monolitni silicijev dioksid za pripravo komponent. V predavanju bomo obravnavali načela nadzora strukture s sol-gel reakcijo v kombinaciji s fazno separacijo in več tehnično pomembnih vprašanj uporabe teh materialov na različnih področjih znanosti o separaciji.

Predavanje bo v angleščini.

Lepo vabljeni!

 

 

 




We invite you to the 21th Institute colloquium in the academic year 2013/14. The colloquium will be held on Wednesday June 04, 2014 at 1 PM in the main Institute lecture hall, Jamova 39, Ljubljana. To read the abstract click  http://www.ijs.si/ijsw/Koledar_prireditev. Past colloquia are posted on  http://videolectures.net/kolokviji_ijs.

 

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prof. dr. Kazuki Nakanishi

Department of Chemistry, Kyoto University, Kyoto, Japan

 

Hierarchically Porous Materials: Preparation and Application to Separation Sciences

 

Polymerization-induced phase separation in chemically cross-linked systems has been applied to obtain hierarchically porous monolithic materials in a broad range of compositions from metal oxides, metalloxane-based hybrids and even to fully organic polymers.  In the case of pure silica, monolithic columns with varied diameter and length have been fabricated and commercialized so far. Due mainly to the freedom of independently controlling the macropore diameter and the thickness of the gel skeletons, monolithic columns can be designed so as to maximize the separation performance while minimizing the column pressure.  Extra-large monoliths offer an opportunity to use monolithic silica for preparative purposes. The talk will cover the principles of structure control through the sol-gel reaction accompanied by phase separation as well as various technically important problems to be solved in applying the materials to widespread areas of separation sciences.

 

Cordially invited!

 

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