Effect of ionizing radiation on the properties of cellulosic materials

Irklei, V. M.; Stavtsov, A. K.; Vavrinyuk, O. S.; Men'shikova, T. M.; Bychkovskii, N. I.; Mokrousova, L. A.

doi:10.1007/bf00558115

Cited by 1 publication

(4 citation statements)

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“…The use of activation of cellulose by electron-beam [36][37][38][39][40][41][42] or microbiological (enzymatic) [43][44][45][46] treatment allows optimizing the molecular-weight distribution (MWD) of the cellulose (The MWD maximum is shifted to the region of a 350-450 degree of polymerization and decreases the amount of low-and high-molecular weight fractions), additionally decreases carbon disulfide consumption, and also makes it possible to eliminate the stage of preripening of the alkali cellulose. Using continuous processes for alkali treatment and squeezing out the alkali cellulose three separate times (with takeoff of the alkali squeezed out in the first squeezing stage containing the largest amount of hemicellulose) is an important innovation [32,33].…”

Section: America Western Europamentioning

confidence: 99%

“…continuous xanthation and dissolution of alkali cellulose using disintegrators (triturators) and gradually decreasing the temperature to 3-5°C, which significantly increases the degree of purity and homogeneity of the viscose; using continuous processes of highly effective vacuum degassing and careful filtration of the viscose in high-performance equipment [30][31][32][33][34][35][36]; ensuring the stability of the composition and properties of the viscose, which causes stability of the spinning process;…”

Section: America Western Europamentioning

confidence: 99%

“…Viscose production, filtration, and degassing are examined in sufficient detail in the literature [2,3,6,[30][31][32][33][34][35][36]. The experience of Lenzing AG, Ing.…”

Section: America Western Europamentioning

confidence: 99%

“…The experience of Lenzing AG, Ing. A Maurer S.A., and other leading firms has been used to create modern manufacturing and equipment solutions in viscose production [31][32][33][34][35][36].…”

Section: America Western Europamentioning

confidence: 99%

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Ways of developing chemical fibres based on cellulose: Viscose fibres and their prospects. Part 1. Development of viscose fibre technology. Alternative hydrated cellulose fibre technology

Perepelkin

2008

Fibre Chem

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The noted Russian scientist, Professor Zakhar Aleksandrovich Rogovin, coined the slogan: Lets make cellulose better than it was created by Nature. The history of the evolution of chemical fibres shows that his prediction is being successfully realized, as the increase in production of viscose fibres and the solution of long-standing problems of recycling and detoxifying emissions indicate. New kinds of viscose staple fibres have been created: cotton-like (modal), antimicrobial, difficultly combustible, and many others.The chemical aspects and basic physicochemical characteristics of viscose fibre production were established a relatively long time ago. However, the technologies and equipment described in many monographs and review articles [1-7] have aged significantly, while the problems of recycling chemicals and scrubbing emissions, especially gaseous emissions, have not been examined in sufficient depth. In addition, there were almost no publications on viscose fibres during restructuring of the economy in our country. However, life continues, and much that is new has appeared in the viscose production sector and requires analysis and generalization.The constant increase in production is the best criterion of the development of viscose fibre production. Beginning in 2001, the production rate increased significantly. The annual increase in production of viscose fibres of 7-11% [8-13] is greater than the rate of increase in the production of most staple fibres with a simultaneous decrease in production of viscose yarns.Beginning with the last quarter of the 20th century, no comprehensive analysis of the technologies and other factors that determine the state of viscose fibre production has been published in the Russian literature. As a result, an mistaken opinion has arisen concerning the poor prospects for viscose production due to the development of synthetic fibres and the advent of Lyocell fibres.* The Russian literature is significantly lagging behind the real development of modern viscose technology. However, many new technical solutions have appeared in this sector, and new equipment and new solutions to problems of recycling chemical and treating emissions have been developed.I have had the occasion to work on viscose production technology, mastering and developing new equipment, treating wastewaters and gaseous emissions, becoming familiar with the operation of a number of the leading world enterprises and companies in viscose production, as well as participating in international conferences on the development of viscose technology, equipment, and treatment of emissions. My accumulated experience combined with the information obtained by the leading companies in different countries allowed analyzing the current state and ways of developing viscose technology presented in the present analytical review.

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Section: America Western Europamentioning

confidence: 99%

Section: America Western Europamentioning

confidence: 99%

“…Viscose production, filtration, and degassing are examined in sufficient detail in the literature [2,3,6,[30][31][32][33][34][35][36]. The experience of Lenzing AG, Ing.…”

Section: America Western Europamentioning

confidence: 99%

Section: America Western Europamentioning

confidence: 99%

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