, Volume 26, Issue 17, pp 9287–9294 | Cite as

Ultrasonic treatment for enhancing the accessibility and reactivity of softwood rayon-grade kraft-based dissolving pulp

  • Shuai Zhou
  • Yali Li
  • Liulian Huang
  • Lihui Chen
  • Yonghao NiEmail author
  • Qingxian MiaoEmail author
Original Research


The cellulose reactivity is a critical parameter in the manufacturing process of viscose rayon with dissolving pulp. In this study, an ultrasonic treatment, which is considered as an environmentally friendly pretreatment technology, was applied to a softwood prehydrolysis kraft-based dissolving pulp for enhancement of accessibility/reactivity in terms of viscose rayon production through cavitation of ultrasound. Results show that the ultrasonic treatment can lead to the decrease of cellulose crystallinity, the increase of specific surface area and average pore diameter in fibers, and the increase of water retention value due to the release of energy induced by the collapse of the gas/vapor bubbles. As a consequence, the Fock reactivity and viscose filterability of dissolving pulp is enhanced significantly after ultrasonic treatment. Other parameters, such as intrinsic viscosity and fiber morphology were also determined.

Graphic abstract


Cellulose Reactivity Ultrasonic treatment Dissolving pulp Crystallinity 



The authors are grateful for the financial supports from the National Natural Science Foundation of China (Grant No. 31770633), Natural Science Foundation of Fujian Province (Grant No. 2015J01074), Educational Commission of Fujian Province (Grant No. JA15171), and Jiangsu Provincial Key Laboratory of Pulp and Paper Science &Technology (Grant No. 201518).


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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.College of Material EngineeringFujian Agriculture and Forestry UniversityFuzhouChina
  2. 2.Jiangsu Provincial Key Laboratory of Pulp and Paper Science and TechnologyNanjing Forestry UniversityNanjingChina
  3. 3.Limerick Pulp and Paper Centre, Department of Chemical EngineeringUniversity of New BrunswickFrederictonCanada

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