The cellulose protection agent used in the oxidation degumming of ramie

Abstract

In this paper, anthraquinone was used to improve the properties of ramie fiber in oxidation degumming. The chemical components, structure properties, tensile properties of degummed fiber and the character of oxidation degumming solution were tested and analyzed. With the optimal dosage of anthraquinone (2% (o.w.f.)), the content of hemicellulose, the yield of degumming process, polymerization degree and the work of rupture of the degummed fiber were improved by 17.3%, 7%, 2% and 41%, respectively. The oxidation reduction potential (ORP) value of the degumming solution was also tested, with the addition of anthraquinone, and the ORP value decreased by 250 mV, which is of benefit for the properties of fiber.

Effect of Growth Period and Sampling Section on the Chemical Composition and Microstructure of Raw Hemp Fibers

“…The crystallinity of L-T fibers, which had inferior peak intensity, was undoubtedly the smallest. This was because the crystallinity is greatly influenced by the cellulose content (Li et al 2015;Meng et al 2016). With a higher cellulose content, the content of non-cellulosic materials, which contained lots of amorphous materials and impurities, is lower (Ebringerová et al 2005), resulting in a larger crystallinity index.…”

Optimization of bio-chemical degumming of Ramie fiber for improved strength & luster

“…The quality of the fiber is dependent on growth conditions, degumming, and finishing of the fiber. The conventional process of degumming of natural fiber is energy-intensive and uses many chemicals, which yields high Chemical oxygen demand (COD) in post-degumming effluent [ 5 ]. There is ample scope for bio-finishing these natural fibers to make them an essential player in the global textile market.…”

“…This process causes serious environmental pollution [ 11 ] and necessitates replacement by an environment-friendly degumming method [ 3 ]. Different groups have been working on the degumming process of Ramie through the oxidation process [ 12 , 13 ], using Fenton reagent [ 14 ], anthraquinone [ 5 ] and hydrogen peroxide (H 2 O 2 ) [ 15 , 16 ]. However, these processes are generating high COD in the degumming effluent [ 5 ].…”

Extraction of Ramie Fiber in Alkali Hydrogen Peroxide System Supported by Controlled-release Alkali Source

“…In previous studies, ramie fiber was extracted in an alkali hydrogen peroxide system supported only by sodium hydroxide 15 . However, due to the strong alkalinity of sodium hydroxide, the oxidation reaction speed of hydrogen peroxide was difficult to control and thus resulted in great damage to the treated fiber 7 .…”