The knowledge of principles of hydrogen bonding build-up during stock preparation is useful addit... more The knowledge of principles of hydrogen bonding build-up during stock preparation is useful additional information for better control of refined pulp. Nevertheless, there is no wide accepted, accurate and quick method to investigate these interactions regarding pulp refining. The principal objective of this paper was to describe the rapid method of non-destructive analysis of handsheets by FTIR spectroscopy in the region of absorption frequencies of hydroxyl groups and interpretation of the results obtained. The proposed method is based on deconvolution of handsheets FTIR spectrum into four Gaussian bands. The calculated energy of hydrogen bonding was ranged from 2 to 25 kJ/mol. The bond energy was classified on weak, medium and strong ones corresponding to inter- or interfibre subtypes. The minimum requirement for handsheets being analyzed by proposed method was found as infrared transmission ranged between 0.10 and 0.50 in the range of 37003000 cm1. Although during investigation o...
The aim of research was first, to study the interactions between components for finding out how p... more The aim of research was first, to study the interactions between components for finding out how pH effects on ζ-potential, dewatering rate and retention of TiO2/MCC mixtures with/without titanyl sulphate in order to find a way to titanyl sulphate hydrolysis in a papermaking process. The maximum heterocoagulation interactions between TiO2, MCC and TiOSO4 were revealed in the pH range 4.4–5.6. Second, handsheets made from refined chemical pulp, titanyl sulphate and TiO2 at pH 4.4 were investigated. The handsheets were formed and studied conventionally and with scanning electron microscopy (SEM). It was shown that titanyl sulphate hydrolysis leads to formation of translucent polymer film covering the fibres and TiO2 particles. The maximum first-pass ash retention reached is lower than its values usually obtained with an organic polymer. Addition of titanyl sulphate led to higher strength, but lowered opacity and brightness compared to a reference sample. The use of low dosage of titany...
The knowledge of principles of hydrogen bonding build-up during stock preparation is useful addit... more The knowledge of principles of hydrogen bonding build-up during stock preparation is useful additional information for better control of refined pulp. Nevertheless, there is no wide accepted, accurate and quick method to investigate these interactions regarding pulp refining. The principal objective of this paper was to describe the rapid method of non-destructive analysis of handsheets by FTIR spectroscopy in the region of absorption frequencies of hydroxyl groups and interpretation of the results obtained. The proposed method is based on deconvolution of handsheets FTIR spectrum into four Gaussian bands. The calculated energy of hydrogen bonding was ranged from 2 to 25 kJ/mol. The bond energy was classified on weak, medium and strong ones corresponding to inter- or interfibre subtypes. The minimum requirement for handsheets being analyzed by proposed method was found as infrared transmission ranged between 0.10 and 0.50 in the range of 37003000 cm1. Although during investigation o...
The aim of research was first, to study the interactions between components for finding out how p... more The aim of research was first, to study the interactions between components for finding out how pH effects on ζ-potential, dewatering rate and retention of TiO2/MCC mixtures with/without titanyl sulphate in order to find a way to titanyl sulphate hydrolysis in a papermaking process. The maximum heterocoagulation interactions between TiO2, MCC and TiOSO4 were revealed in the pH range 4.4–5.6. Second, handsheets made from refined chemical pulp, titanyl sulphate and TiO2 at pH 4.4 were investigated. The handsheets were formed and studied conventionally and with scanning electron microscopy (SEM). It was shown that titanyl sulphate hydrolysis leads to formation of translucent polymer film covering the fibres and TiO2 particles. The maximum first-pass ash retention reached is lower than its values usually obtained with an organic polymer. Addition of titanyl sulphate led to higher strength, but lowered opacity and brightness compared to a reference sample. The use of low dosage of titany...
Uploads