A Novel Approach of Low Alkali Degumming of Ramie

ABSTRACT

A novel low alkali-based chemical recipe was formulated for controlled degumming of ramie (Boehmeria Nivea L.) fiber to maintain residual gum 7–8% aiming at to improve yarn tensile performance. The method includes the application of H₂SO₄ at a low concentration (2%) followed by a treatment with a low concentration of NaOH (6%) on the weight of fiber. Treatment condition and chemical formulation were varied to obtain degumming to the extent of 20–22%. Degummed fiber tenacity (52.33 cN/tex), extensibility (3.85%) and modulus (2263.7 cN/tex) were found to be notably high. The gum remained in fiber surfaces produces resultant yarn of very high strength breaking load (28.7 N), tenacity (20.9 cN/tex), initial modulus (782.9 cN/tex) specific work of rupture (3.0 mJ/tex.m) with low extensibility (2.95%). COD, BOD, TDS, and pH of the generated effluent was 927 mg/L, 328 mg/L, 680 ppm, 8.7 only. Cost of chemical for the treatment was as low as USD $ 0.2/kg of fiber. Comparison of ramie and jute yarn properties suggests that ramie may be used for high-performance industrial uses where high strength, as well as high modulus, is essentially needed viz., conveyor belts, tire cords, and composites.

摘要

为使苎麻纤维的残胶率保持在7-8%，提高纱线的拉伸性能，研制了一种新型低碱化学配方. 该方法包括以低浓度（2%）施用硫酸，然后以低浓度NaOH（6%）处理纤维重量. 通过改变处理条件和化学配方，使脱胶率达到20-22%. 脱胶纤维的强度（52.33 cN/tex）、延伸率（3.85%）和模量（2263.7 cN/tex）均明显较高. 残留在纤维表面的胶产生高强度（断裂负荷（28.7N）、韧性（20.9cn/tex）、初始模量（782.9cn/tex）、断裂比功（3.0 mj/tex.m）的合成纱，延伸率低（2.95%）. 产生的废水的COD、BOD、TDS和pH值分别为927 mg/L、328 mg/L、680 ppm、8.7. 化学处理成本低至0.2美元/千克纤维. 对苎麻和黄麻纱线性能的比较表明，苎麻可用于高性能工业用途，在这些用途中，主要需要高强度和高模量，即输送带、轮胎帘线和复合材料.

KEYWORDS:

• Ramie
• degumming
• physico-mechanical properties
• Composition
• SEM
• yarn

关键词:

• 脱胶
• Ramie
• degumming
• 脱胶
• physico-mechanical properties
• 物理力学性能
• composition
• 组成
• SEM
• yarn纱线

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Color versions of one or more of the figures in the article can be found online at www.tandfonline.com/wjnf.