RT info:eu-repo/semantics/bachelorThesis
T1 Cellulose-based porous polymers obtained throught high internal phase emulsions
A1 Estévez Recio, Paula
A2 Universidad de Valladolid. Escuela de Ingenierías Industriales
K1 PolyHIPE
K1 Acrylic acid
K1 Cellulose
K1 Adsorption
K1 Porosity
K1 2304.02 Celulosa
AB This thesis aims to explain the synthesis of polyHIPEs containing cellulose. The polyHIPEswere prepared by using oil-in-water (O/W) emulsions. The water (continuous) phase consistedof acrylic acid (AA), carboxy methyl cellulose (CMC), N,N′-methylenebisacrylamid (MBA),a surfactant and appropriate initiators, whereas the oil (internal) phase was toluene. Thepolymerisation was carried out thermally at 60 ºC for 24 hours. The obtained polymers had adisctint polyHIPE morphology with various diameters, depending on the crosslinking degreeand 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 threelevels of porosity – primary, secondary and tertiary. The pore sizes ranged from approximately32 μm (0 % CMC) to 260 μm (1 % CMC), with the BET surface area ranging fromapproximately 1.3 m2/g to 3.9 m2/g. The polyHIPEs were also used for the adsorption ofmethylene 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 anideal amount of CMC is below 2.5 % (CMC solution).
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/49510
UL https://uvadoc.uva.es/handle/10324/49510
LA eng
NO Departamento de Ingeniería Química y Tecnología del Medio Ambiente
DS UVaDOC
RD 17-jul-2024