Production of fibrillated cellulose materials - Effects of pretreatments and refining strategy on pulp properties

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Rantanen, Juuso Zheng, Hongliang 2014-05-13T07:34:50Z 2014-05-13T07:34:50Z 2014-05-06
dc.description.abstract The aim of this work was to manipulate the sub-cell wall swelling of wood fibers and then refining in a conventional refiner to demonstrate the possibility of producing useful fibrillated cellulose product. The swelling was changed by two different pretreatments: enzymatic hydrolysis and anionic polymer adsorption. In addition, a modified Valley beater was tested to study the effect of fiber cutting as a pretreatment. Both pretreatment methods: cellulase hydrolysis and anionic polymer adsorption showed potential on manipulating the swelling properties of cellulose fiber and facilitating disintegration of pulp during refining. The swelling results showed it is possible to increase internal fibrillation of fibers without increasing the fiber swelling by using both methods, especially by cellulase hydrolysis. The sharp edge bars of modified Valley beater mainly shorten the fiber rather than fibrillate it compared with standard one. en
dc.format.extent 58+12
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Production of fibrillated cellulose materials - Effects of pretreatments and refining strategy on pulp properties en
dc.type G2 Pro gradu, diplomityö en Kemian tekniikan korkeakoulu fi
dc.subject.keyword fibrillated cellulose en
dc.subject.keyword cellulase en
dc.subject.keyword PAA en
dc.subject.keyword Valley beater en
dc.subject.keyword swelling properties en
dc.subject.keyword surface area en
dc.identifier.urn URN:NBN:fi:aalto-201405131808
dc.programme.major Fibre Products Technology fi
dc.programme.mcode KM3003 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Maloney, Thaddeus
dc.programme Master's Programme in Bioproduct Technology fi
dc.location PK fi

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