POE - INDUSTRIA PETROCHIMICA DIN ROMANIA – - ICECHIM

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HIBRIDE POLIMERICE ANORGANIC – ORGANICE OBTINUTE PRIN POLIMERIZARE RADICALICA Anamaria Lungu1 , Anita-Laura Radu1 , Andrei Sarbu1 , Victor Fruth2 , Marius Ghiurea1 , Sorina Garea 3 , Stefan-Ovidiu Dima 1 , Tanta-Verona Nicolescu 1 , Mircea Teodorescu 3 1. Institutul National de Cercetare – Dezvoltare pentru Chimie si Petrochimie – ICECHIM Bucuresti 2. Institutul de Chimie Fizica “Ilie Murgulescu” al Academiei Romane,Bucuresti 3. Universitatea Politehnica Bucuresti, Facultatea de Chimie Aplicata si Stiinta materialelor, Bucuresti In ultimele doua decenii, procesarea ceramicii si a compozitelor ceramice care utilizeaza precursori polimerici a castigat recunoastere multumita avantajelor pe care le ofera fata de procesarea traditionala a ceramicii. Aceste avantaje includ temperaturi de procesare scazute, microstructuri si compozitii usor de ajustat 1-4 . Aceasta lucrare trateaza o metoda noua „gelcasting” pentru producerea materialelor ceramice dense si poroase pe baza de caolina. Metoda de gelcast este o metoda bazata pe obtinerea intermediara a unor geluri initiate de polimerizarea “in situ” in pasta ceramica 5 . S-au facut cercetari preliminare de obtinerere a gelurilor nanocompozite si analiza acestora, avand drept scop identificarea conditiilor in care are loc polimerizarea monomerilor acrilici in suspensii anorganice concentrate. O problema a constituit-o alegerea unui monomer vinilic adecvat. S-a optat pentru acidul acrilic deoarece acidul acrilic (AA) este considerat slab toxic fata de acrilamida, monomer des utilizat in procedeul de obtinere a spumelor ceramice prin metoda gelcasting. S-a folosit ca dispersant poliacrilatul de amoniu, ca agent de reticulare s-a folosit N,N , -metilen bisacrilamida (MBAM). S-a optat pentru polimerizarea radicalica, intrucat aceasta poate fi realizata in conditii experimentale mai simple decat alte tipuri de polimerizare. Ca initiator de polimerizare, s-a ales persulfat de potasiu (PK) si un al doilea metabisulfit de sodiu (MS), care sunt cunoscuti ca initiatorii ai polimerizarii acidului acrilic, prin formarea unui sistem redox. Gelurile nanocompozite obtinute a fost analizate prin diverse metode: FTIR, XRD, SEM, DSC,TGA. Bibliografie: 1. Rice RW (1983) Cer Bull 62(8):889 2. Wynne KJ, Rice RW (1984) Ann Rev Mater Sci 14:297 3. Greil P (1995) J Am Cer Soc 78(4):835 4. Riedel R, Dressler W (1996) Cer Int 22:233 5. Dweck J., Fischer R., Fischer E. J. Therm. Anal. (1997), Vol. 49 1249-125 Comunicare orala 26
COMPARISON BETWEEN MOLECULARLY IMPRINTED POLYMERS PREPARATION BY PHASE INVERSION AND RADICAL POLYMERISATION Stefan-Ovidiu Dima1 , Andrei Sarbu1 , Tanase Dobre2 , Tanta-Verona Nicolescu1 , Marius Ghiurea 1 , Anita-Laura Radu 1 , Anamaria Lungu 1 1 National Institute of Research and Development in Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independentei, 6 th District, C.P. 15-159, postal code 06002,1 Bucharest, Romania, E-mail: phd.ovidiu.dima@gmail.com 2 Polytechnic University of Bucharest, 313 Splaiul Independentei, postal code 060042, Bucharest, Romania Since the beginning of polymer imprentation, in 1972 by Wulf and Sarhan 1 , this method has gain interest in the high selective material domain preparation for separation purposes. A molecularly imprinted polymer is a polymer that formed in the presence of a molecule that is extracted afterwards, thus leaving complementary molecular cavities behind with specific electronic surroundings. The affinity for the target molecule suggests that they can be used in applications of advanced separations, biosensors, the mechanism being similar to antibodies and enzymes. Whatever the final form of the polymer, particles, membranes 2 or gels, obtaining selective materials 3 can be made using two methods: phase inversion and polymerisation by auto-assembly. The functional mechanism of these MIP’s is similar to antibodies and enzymes. Phase inversion method involves precipitation of the polymer in a suitable solution containing the template molecule. Auto- assembly method consists in pre-mixing the template and the monomer to establish specific physical bonding and then, by adding a hardening agent, the structure template-monomer is "frozen" by polymerization. References: [1]. G. Wulff and A. Sarhan, Angew.Chem., 1972, 84, 364. [2] Parkt, J.K., Seo, J.II, Characteristics of Phenylalanine Imprinted Membrane Prepared by the Wet Phase Inversion Method, Korean J. Chem. Eng.,2002, 19(6),940-948. [3] Silvestri, D., Coluccio, M.L. , Barbani, N., Ciardelli, G., Cristallini, C., Pegoraro, C., Giusti, P., Poly(ethylene-co-vinyl alcohol) membranes with specific adsorption properties for potential clinical application, Desalination 199, 2006, 138–140. Comunicare orala 27
Page 1 and 2: Nanocompozite Polimerice Dan Donesc
Page 3 and 4: TEHNICA “SLURRY” APLICATA NANOC
Page 5 and 6: Autori: Vasile Predica CERCETARI PR
Page 7: Modificarea polimerilor ionici reti
Page 10 and 11: SISTEME COLOIDALE MONODISPERSE Alex
Page 12 and 13: CERCETARI PRIVIND OBTINEREA UNOR MA
Page 14 and 15: NANOMATERIALS IN MEDICINE LABORATOR
Page 16 and 17: COMPUSI ORGANICI TRIBOLUMINISCENTI
Page 18 and 19: COMPOZITE POLIMERICE BITUMINOASE PE
Page 20 and 21: ASPECTE PRIVIND COMPORTAREA LA EXTR
Page 22 and 23: NANOBIOMATERIALS OBTAINING BY INNOV
Page 24 and 25: Dispersarea nanofibrilelor celulozi
Page 28 and 29: Nanocompozite pe baza de polietilen
Page 30 and 31: APLICAREA TINCTORIALA A UNOR CROMOG
Page 32 and 33: SINTEZA ŞI CARACTERIZAREA UNOR POL
Page 34 and 35: SENSIBILIZAREA MATERIALELOR FOTOTER
Page 36 and 37: Reactiile de metateza cu deschidere
Page 38 and 39: ELECTRODEPUNEREA DE FILME SUBTIRI C
Page 40 and 41: CORELATII PERMEABILITATE LA GAZE, S
Page 42 and 43: SUBSTRATURI NANOSTRUCTURATE SI FUNC
Page 44 and 45: BIOSINTEZA NANOPARTICULELOR DE AUR
Page 46 and 47: NANOCOMPOZITE POLIMERICE FOTOLUMINI
Page 48 and 49: UTILIZAREA CELULELOR SOLARE Nicolae
Page 50 and 51: CELULA SOLARA Nicolae Irina-Elena C
Page 52 and 53: CONTRIBUTII LA SINTEZA IN EMULSIE A
Page 54 and 55: Din acest punct de vedere in figura
Page 56 and 57: ELLYPSOMETRY ; APPLICATION FIELD Ma
Page 58 and 59: PROTECTIA MEDIULUI PRIN CERCETARI A
Page 60 and 61: FERTILIZANTI EXTRARADICULARI CU SUB
Page 62 and 63: DEZVOLTAREA SI VALIDAREA UNEI METOD
Page 64 and 65: IDENTIFICAREA MICROORGANISMELOR CAR
Page 66 and 67: Thermo stability of extracellular m
Page 68 and 69: REALIZAREA UNOR COMPOSITE INTELIGEN
Page 70 and 71: ADITIVI ALIMENTARI PENTRU COLORAREA
Page 72 and 73: Noi compusi calixarenici pentru eli
Page 74 and 75: SISTEME CROMOGENE CU STRUCTURA CONT
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INFLUENTA ELECTRICITATII ATMOSFERIC
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Holographic method for real-time gr
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VALORIFICAREA BIORESURSELOR REGENER
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SE-SPIRULINA -SUPLIMENT ALIMENTAR A
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asemenea, sunt prezenti compusi org
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DEVELOPMENT OF HIGH ADDED VALUE PRO
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BIOCARBURANŢI DIESEL ŞI EMULGATOR
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THE INTELLIGENT CONTROL MODELING OF
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ANALIZA SITUATIEI ACTUALE SI PROGNO
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STUDII PRIVIND PREPARAREA SI CARACT
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FILME COMESTIBILE PE BAZA DE AGRO-P
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BAKER’S YEAST PRODUCTION IN BATCH
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NANOMATERIALE CU APLICATII in vitro
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MODEL EXPERIMENTAL AL INTERACTIEI E
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Abstract ISOLATION AND ANALYSIS OF
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SYNTHESIS BY CRYOGENIC METHOD OF MA
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HIDROGENOLIZA GLICERINEI IN CATALIZ
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Valeria VARIETATILOR DE Camellia si
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STUDIUL COMPARATIV ASUPRA DETERMINA
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CARACTERIZAREA UNOR DERIVATI PETROL
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IDENTIFICAREA COMPUSILOR ADSORBITI
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DETERMINARI SPECTROSCOPICE SI CROMA
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EVALUAREA EFECTELOR ALGICIDE ALE UN
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COLONIZAREA LICHENILOR PE ZIDURILE
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NOI COMPOZITII ECOLOGICE CU POTENTI
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POE - INDUSTRIA PETROCHIMICA DIN ROMANIA – - ICECHIM

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