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Production of textile filaments from carboxymethylated cellulosic pulps
Cellulose ( IF 5.7 ) Pub Date : 2021-07-27 , DOI: 10.1007/s10570-021-04073-5
Md. Shahidul Islam 1, 2 , Theo. G. M. van de Ven 1, 2 , Md Nur Alam 3
Affiliation  

Textile filaments were fabricated from a solution obtained from carboxymethylated cellulose dissolved in aqueous NaOH solution, by wet spinning in an acid coagulation bath. Spinning is possible for modified cellulose with a carboxyl group content of at least 1.3 mmol/g cellulose. A post-treatment—heating in the presence of sodium hypophosphite—improved the properties of these filaments. This is a novel process, much more environmentally friendly than the viscose process for the production of rayon, in which most of the chemicals can be reused making it likely that the process is economically viable. After extrusion in an acid bath, filaments containing 1.3 mmol –COOH/g cellulose could be washed with water quite readily, a process very difficult for filaments with carboxyl group content of 1.5–1.7 mmol/g cellulose. The tenacity of the filaments obtained from the modified cellulose with a carboxyl group content of 1.3 mmol/g cellulose was 1.0 cN/dtex, which was higher than that of the filaments with carboxyl group contents of 1.5 mmol/g cellulose (tenacity 0.93 cN/dtex) and 1.7 mmol/g cellulose (tenacity 0.88 cN/dtex). The water absorbency of the filaments made from the modified cellulose with carboxyl group content of 1.3 mmol/g cellulose was 0.54 g water/g filaments which was ~ 2 times and ~ 3.5 times lower than that of the filaments with carboxyl group contents of 1.5 mmol/g cellulose and 1.7 mmol/g cellulose, respectively. The values of tenacity and water absorbency for filaments with 1.3 mmol/g cellulose are extremely promising for textile applications.

Graphical abstract



中文翻译:

从羧甲基化纤维素纸浆生产纺织长丝

纺织长丝是由羧甲基化纤维素溶解在氢氧化钠水溶液中获得的溶液,通过在酸凝固浴中湿纺制成的。羧基含量至少为 1.3 mmol/g 纤维素的改性纤维素可以纺丝。后处理——在次磷酸钠存在下加热——改善了这些长丝的特性。这是一种新颖的工艺,比生产人造丝的粘胶工艺更加环保,其中大部分化学品可以重复使用,因此该工艺在经济上是可行的。在酸浴中挤出后,含有 1.3 mmol –COOH/g 纤维素的长丝可以很容易地用水洗涤,这对于羧基含量为 1.5-1.7 mmol/g 纤维素的长丝来说非常困难。羧基含量为1.3 mmol/g纤维素的改性纤维素长丝的韧度为1.0 cN/dtex,高于羧基含量为1.5 mmol/g纤维素的长丝(韧度0.93 cN/dtex)。 dtex)和 1.7 mmol/g 纤维素(韧度 0.88 cN/dtex)。由羧基含量为 1.3 mmol/g 纤维素的改性纤维素制成的长丝的吸水率为 0.54 g 水/g 长丝,是羧基含量为 1.5 mmol 的长丝的~2 倍和~3.5 倍分别为 /g 纤维素和 1.7 mmol/g 纤维素。含有 1.3 mmol/g 纤维素的长丝的韧度和吸水率值非常适合纺织应用。高于羧基含量为 1.5 mmol/g 纤维素(强度 0.93 cN/dtex)和 1.7 mmol/g 纤维素(强度 0.88 cN/dtex)的长丝。由羧基含量为 1.3 mmol/g 纤维素的改性纤维素制成的长丝的吸水率为 0.54 g 水/g 长丝,是羧基含量为 1.5 mmol 的长丝的~2 倍和~3.5 倍分别为 /g 纤维素和 1.7 mmol/g 纤维素。含有 1.3 mmol/g 纤维素的长丝的韧度和吸水率值非常适合纺织应用。高于羧基含量为 1.5 mmol/g 纤维素(强度 0.93 cN/dtex)和 1.7 mmol/g 纤维素(强度 0.88 cN/dtex)的长丝。由羧基含量为 1.3 mmol/g 纤维素的改性纤维素制成的长丝的吸水率为 0.54 g 水/g 长丝,是羧基含量为 1.5 mmol 的长丝的~2 倍和~3.5 倍分别为 /g 纤维素和 1.7 mmol/g 纤维素。含有 1.3 mmol/g 纤维素的长丝的韧度和吸水率值非常适合纺织应用。由羧基含量为 1.3 mmol/g 纤维素的改性纤维素制成的长丝的吸水率为 0.54 g 水/g 长丝,是羧基含量为 1.5 mmol 的长丝的~2 倍和~3.5 倍分别为 /g 纤维素和 1.7 mmol/g 纤维素。含有 1.3 mmol/g 纤维素的长丝的韧度和吸水率值非常适合纺织应用。由羧基含量为 1.3 mmol/g 纤维素的改性纤维素制成的长丝的吸水率为 0.54 g 水/g 长丝,是羧基含量为 1.5 mmol 的长丝的~2 倍和~3.5 倍分别为 /g 纤维素和 1.7 mmol/g 纤维素。含有 1.3 mmol/g 纤维素的长丝的韧度和吸水率值非常适合纺织应用。

图形概要

更新日期:2021-09-01
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