Textile grade long natural cellulose fibers from bark of cotton stalks using steam explosion as a pretreatment

Zhen Dong, Xiuliang Hou, Fangfang Sun, Li Zhang, Yiqi Yang

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

Textile grade long natural cellulose fibers with fineness of 27 dtex have been extracted from bark of cotton stalks by a combination of steam explosion, potassium hydroxide and peroxide treatments (explosion-KOH-H2O2). It was reported that natural cellulose fibers from bark of cotton stalks had significantly better mechanical properties than those from other lignocellulosic agricultural byproducts such as rice and wheat straws. Fibers from bark of cotton stalks were used to reinforce thermoplastic composites but could not be spun into yarns for textile applications due to their high fineness value (around 50 dtex) and/or low aspect ratio (around 660). In this research, barks of cotton stalks were treated using three methods, including steam explosion, a combination of steam explosion and potassium hydroxide treatments (explosion-KOH) and explosion-KOH-H2O2. The morphology, composition, carding yield, crystalline structures and tensile properties of three different cotton stalk fibers were analyzed. Results showed that cotton stalk fibers extracted by explosion-KOH-H2O2 had the lowest fineness value of 27 dtex and moderate aspect ratio of 1,150 in three kinds of fibers. The fibers also had most clean and smooth surfaces, highest carding yield of 68.6 %, and highest cellulose content of 82.1 wt% due to effective removal of non-cellulose impurities. Moreover, the fibers had tensile properties close to cotton fibers. Overall, the cotton stalk fibers presented a better potential to be used as textile fibers than those reported by previous researches. explosion-KOH-H2O2 could be an efficient method for exploring textile applications of bark of cotton stalks.

Original languageEnglish (US)
Pages (from-to)3851-3860
Number of pages10
JournalCellulose
Volume21
Issue number5
DOIs
StatePublished - Oct 2014

Keywords

  • Agricultural byproducts
  • Bark of cotton stalks
  • Natural cellulose fibers
  • Pretreatment
  • Steam explosion

ASJC Scopus subject areas

  • Polymers and Plastics

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