title: Processing surface sizing starch using oxidation, enzymatic hydrolysis and ultrasonic treatment methods--Preparation and application.
abstract: The surface application of starch is a well-established method for increasing paper strength. In surface sizing, a solution of degraded starch is applied to the paper. Two procedures have proved valuable for starch degradation in the paper mill: enzymatic and thermo-oxidative degradation. The objective of this study was to determine achievable efficiencies of cavitation in preparing degraded starch for surface application on paper. It was found that ultrasonic-assisted starch degradation can provide a starch solution that is suitable for surface sizing. The molecular composition of starch solutions prepared by ultrasonic treatment differed from that of starch solutions degraded by enzymes or by thermo-oxidation. Compared to commercial degradation processes, this resulted in intensified film formation and in greater penetration during surface sizing and ultimately in a higher starch content of the paper. Paper sized with ultrasonically treated starch solutions show the same strength properties compared to commercially sized paper.
authors.affiliation: Papiertechnische Stiftung, Pirnaer Straße. 37, D-01809 Heidenau, Germany. Electronic address: t.brenner@erfurt.com.
authors.forename: Tobias
authors.initials: T
authors.lastname: Brenner
authors.affiliation: Papiertechnische Stiftung, Pirnaer Straße. 37, D-01809 Heidenau, Germany. Electronic address: birgit.kiessler@ptspaper.de.
authors.forename: Birgit
authors.initials: B
authors.lastname: Kiessler
authors.affiliation: Fraunhofer Institute for Applied Polymer Research, Geiselbergstraße 69, D-14476 Potsdam, Germany. Electronic address: sylvia.radosta@iap.fraunhofer.de.
authors.forename: Sylvia
authors.initials: S
authors.lastname: Radosta
authors.affiliation: Papiertechnische Stiftung, Pirnaer Straße. 37, D-01809 Heidenau, Germany. Electronic address: tiemo.arndt@ptspaper.de.
authors.forename: Tiemo
authors.initials: T
authors.lastname: Arndt
mesh_terms: D006026:Glycoside Hydrolases / Q000378:metabolism; D006868:Hydrolysis; D010084:Oxidation-Reduction; D013010:Sonication; D013213:Starch / Q000737:chemistry / Q000378:metabolism*; D013696:Temperature; D014783:Viscosity
chemical_list: D013213:Starch; D006026:Glycoside Hydrolases; C100181:pullulanase
keywords: Jet cooking; Molar mass; Paper properties; Starch degradation; Surface sizing; Ultrasonic