20.500.12556/DKUM-67866 Uporaba kremenove mikrotehtnice za spremljanje adsorpcije biopolimerov Use of quartz crystal microbalance (QCM) for biopolymers adsorption studies Uporaba polimerov naravnega izvora oziroma biopolimerov se v zadnjih letih povečuje, posebno na področju biorafinerije. Najobetavnejši biopolimeri so rastlinski polisaharidi, ki so potencialni materiali tudi za hidrokoloide in nove napredne naravne materiale. Velika količina potencialno uporabnih hemiceluloz se zavrže med proizvodnjo termomehanične pulpe (TMP) z odpadnimi procesnimi vodami. Hemiceluloze iz mehkega lesa, kot je smrekovina, so bile testirane kot material za proizvodnjo biorazgradljivih filmov in hidrokoloidov. Adsorpcija in stabilnost teh adsorbiranih hemiceluloznih filmov sta pomembna dejavnika v koloidni in prehranski kemiji. Ena od tehnik, s katerimi lahko spremljamo adsorpcijo v realnem času, je kremenova mikrotehtnica (QCM-D). V našem prispevku smo uporabili kremenovo mikrotehtnico za adsorpcijo hemiceluloz iz smrekovine na modelno površino polietilentereftalata (PET). Dodana sol je povečala stopnjo adsorpcije hemiceluloz na površino PET zaradi omiljenja odbojnih sil med negativno nabito površino PET in negativnimi skupinami v hemicelulozah. The importance of biomaterials has been on the increase during the last years, especially in the field of biorefineries. The most abundant biopolymers are plant polysaccharides, which are potential materials for hydrocolloids and novel advanced natural materials. During the thermomechanical pulp (TMP) production, a huge amount of hemicelluloses with a great application potential are disposed with process waters. Hemicelluloses from spruce wood were tested as the material for the production of biodegradable films and as hydrocolloids. Therefore, the adsorption process and stability of adsorbed hemicellulose films are important in the colloid and food chemistry. One of the techniques which can be used for the in situ adsorption studies is quartz crystal microbalance with dissipation unit (QCM-D). In our study, QCM-D was used for monitoring the adsorption of hemicellulose from spruce wood onto model poly(ethyleneterephtalate) (PET) surface. The added salt increased the adsorption of hemicelluloses from softwood due to the shielding of repulsive forces between the negative charges of the PET surface and negative charge groups in hemicelluloses. kremenova mikrotehtnica hemiceluloze termomehanična pulpa galaktoglukomanan quartz crystal mikrobalance hemicellulose PET thermomechanical pulp galactoglucomanan true false true Slovenski jezik Angleški jezik Znanstveno delo 2017-09-01 09:01:06 2017-09-01 09:02:02 2022-08-01 14:32:53 2019-07-11 16:33:49 2011 0 0 str. 172-180 št. 7/9 Letn. 54 2011 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 0351-3386 676.017 763396 15653910 0351-3386 URN:SI:UM:DK:AJ82QP7O Tekstilec_2011_Doliska_Uporaba_kremenove_mikrotehtnice_za_spremljanje_adsorpcije_biopolimerov.pdf Tekstilec_2011_Doliska_Uporaba_kremenove_mikrotehtnice_za_spremljanje_adsorpcije_biopolimerov.pdf 1 F03A7FBC5B098F15EF5CBF217BCD62D5 29dc153142035bf9963bea4778063b15ec1a134b447a58a3017b84bd7b9d37d0 9c49edf4-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/f4ed211d-f96a-4510-8737-ea8e82c6f717 https://dk.um.si/Dokument.php?lang=slv&id=116715 http://www.tekstilec.si/wp-content/uploads/2011/08/Uporaba-kremenove-mikrotehtnice-za-spremljanje-adsorpcije-biopolimerov.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=116714 Fakulteta za strojništvo 0 0 0