Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Rallming Yang"'
Autor:
C. Luettgen, Rallming Yang
Publikováno v:
September 2020. 19:463-470
Potassium monopersulfate (KMPS) was used in repulping of polyamide-epichlorohydrin (PAE)-containing paper towel. The effectiveness of the repulping aid was compared with that of sodium hypochlorite. Addition of a 2.4% KMPS repulping aid achieved comp
Publikováno v:
Industrial & Engineering Chemistry Research. 49:1473-1479
This paper presents results on the features of bagasse pretreatment with peroxide and acetic acid (peroxide−HAc) aiming at selective removal of lignin to enhance enzymatic hydrolysis. Surface response methodology was employed to study the effects o
Autor:
Yuan-Zong Lai, Rallming Yang
Publikováno v:
Journal of Wood Chemistry and Technology. 29:164-177
The O2 delignification of kraft pulps from Norway spruce was shown having a significant impact on the reactivity of the residual pulp lignin as revealed from their responses to sulfite treatments at pH 7.5. A substantial higher ratio of lignin sulfon
Publikováno v:
Industrial & Engineering Chemistry Research. 48:4322-4325
A new approach to the measurement of x−y uniformity of the surface of a paper sheet is described. Scanning electron micrographs are taken of both the top and bottom surfaces of a paper sheet and image-analyzed. The images were converted to grayscal
Autor:
Kristina Knutson, Arthur J. Ragauskas, Gisela Buschle-Diller, Dong Ho Kim, Thomas Elder, Zheng Dang, Cameron I. Thomson, Rallming Yang, Yunqiao Pu
Publikováno v:
Holzforschung. 61:131-137
Samples of two historical papers from the late 17th and early 18th centuries were irradiated with a 350-nm λmax light source. Atomic force microscopy examination of untreated samples of these laid paper sheets revealed notable surface inhomogeneity.
Publikováno v:
Holzforschung. 60:498-502
Sulfide diffusion into wood has a rapid reversible component and a much slower irreversible component. During the initial reversible phase, sulfide is unable to diffuse into parts of the wood structure, probably because of charge exclusion. The diffu
Publikováno v:
Journal of Applied Polymer Science. 99:1346-1349
The effects of adding poly(lactic acid) (PLA) to the physical strength of paper test sheets prepared from three unbleached loblolly pine kraft pulps with different amounts of lignin and an aspen bleached chemothermomechanical pulp were studied. The p
Publikováno v:
Journal of Wood Chemistry and Technology. 23:13-29
Two southern pine kraft pulps with kappa numbers of 30.0 (SW1-0) and 48.0 (SW2-0) were oxygen delignified by 30–60% by varying the reaction temperature (78–110°C) and charge of sodium hydroxide (1.6–4.4%). O-bleachability was found to be corre
Publikováno v:
Industrial & Engineering Chemistry Research. 41:5941-5948
A series of sweet gum kraft pulps with initial kappa numbers ranging from 29 to 13.6 was subjected to oxygen delignification employing 1.00 and 4.00% charges of caustic. The O-delignified pulps were characterized according to lignin content, pulp yie
Publikováno v:
Industrial & Engineering Chemistry Research. 49:3983-3985
Polysulfides increase yield from kraft pulping by selectively oxidizing the reducing end groups of the polysaccharides thereby protecting them from hydrolysis. The principal polysulfide homologue formed in white liquor after addition of elemental sul