| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Priprava poroznih polimerov na osnovi celuloze z uporabo emulzij z visokim deležem notranje faze : bachelor thesis
Authors:ID Estévez Recio, Paula (Author)
ID Krajnc, Peter (Mentor) More about this mentor... New window
ID Kramer, Stanko (Comentor)
Files:.pdf UN_Estevez_Recio_Paula_2021.pdf (10,55 MB)
MD5: DCFD3795096CEE3D734F5351F8F9A185
PID: 20.500.12556/dkum/65faeac5-1746-4a33-9b9a-3f35a926acbc
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen tega dela je razložiti sintezo poliHIPE, ki vsebujejo celulozo. PoliHIPE so bili pripravljeni z uporabo emulzij olja v vodi (O/W). Vodna (kontinuirana) faza je bila sestavljena iz akrilne kisline (AA), karboksimetilceluloze (CMC), N,N′-metilenbisakrilamida (MBA), površinsko aktivne snovi in ustreznih iniciatorjev, medtem ko je bila oljna (notranja) faza toluen. Polimerizacija je potekala termično pri 60 ºC 24 ur. Dobljeni polimeri so imeli diskontinuitetno morfologijo poliHIPE z različnimi premeri, odvisno od stopnje zamreženja in količine CMC. Zanimivo je, da sta prisotnost CMC in višja stopnja zamreženja (30 %) povzročila nastanek večjih por, ki so v bistvu oblikovale material s tremi stopnjami poroznosti - primarno, sekundarno in terciarno. Velikost por je bila od približno 32 μm (0 % CMC) do 260 μm (1 % CMC), površina BET pa se je gibala od približno 1,3 m2/g do 3,9 m2/g. PoliHIPE smo uporabili tudi za adsorpcijo metilen modrega (MB). Pokazalo se je, da prisotnost CMC poveča adsorpcijo MB, vendar se pri višjih koncentracijah CMC adsorpcija zmanjša, kar kaže, da je idealna količina CMC pod 2,5 % (raztopina CMC).
Keywords:PolyHIPE, akrilna kislina, celuloza, adsorpcija, poroznost
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[P. Estevez Recio]
Year of publishing:2021
Number of pages:VII, 29 str.
PID:20.500.12556/DKUM-80108 New window
UDC:661.728:665.652.2(043.2)
COBISS.SI-ID:80893955 New window
Publication date in DKUM:22.09.2021
Views:1136
Downloads:64
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share


Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:30.08.2021

Secondary language

Language:English
Title:Cellulose - based porous polymers obtained through high internal phase emulsions
Abstract:This thesis aims to explain the synthesis of polyHIPEs containing cellulose. The polyHIPEs were prepared by using oil-in-water (O/W) emulsions. The water (continuous) phase consisted of acrylic acid (AA), carboxy methyl cellulose (CMC), N,N′-methylenebisacrylamid (MBA), a surfactant and appropriate initiators, whereas the oil (internal) phase was toluene. The polymerisation was carried out thermally at 60 ºC for 24 hours. The obtained polymers had a disctint polyHIPE morphology with various diameters, depending on the crosslinking degree and amount of CMC. Interestingly, the presence of CMC and higher crosslinking degree (30 %) caused the formation of bigger pores which essentially formed a material with three levels of porosity – primary, secondary and tertiary. The pore sizes ranged from approximately 32 μm (0 % CMC) to 260 μm (1 % CMC), with the BET surface area ranging from approximately 1.3 m2/g to 3.9 m2/g. The polyHIPEs were also used for the adsorption of methylene blue (MB). It was shown that the presence of CMC increased the adsorption of MB, however, at higher concentrations of CMC the adsorption decreased which indicates that an ideal amount of CMC is below 2.5 % (CMC solution).
Keywords:PolyHIPE, acrylic acid, cellulose, adsorption, porosity


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica