Investigation of coagulation process of wet-spun sodium alginate polymannuronate fibers with varied functionality using organic coagulants and cross-linkers

海藻酸钠 凝结 过程(计算) 制浆造纸工业 化学工程 材料科学 冶金 计算机科学 心理学 操作系统 精神科 工程类
作者
Taufiq Hasan Aneem,Siew Yee Wong,Humayra Afrin,Md Nurunnabi,Liang Xu,M. Tarik Arafat
出处
期刊:Materials Today Chemistry [Elsevier]
卷期号:22: 100580-100580 被引量:3
标识
DOI:10.1016/j.mtchem.2021.100580
摘要

Alginate fibers composed of mannuronate blocks were manufactured via a wet spinning process by varying organic coagulants and cross-linkers. As cross-linkers, both ionic (Ca2+, Ba2+, and Al3+) and covalent (citric acid) were used, and as coagulants, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), and tetrahydrofuran (THF) were selected. Fiber properties depended on the ionic size, valence, and chemical structure of the cross-linkers. Among the used cross-linkers, Al3+ being the smallest ion, could diffuse inside the polymer solution easily and form metal-carboxylate coordination with three mannuronate chains. However, Ca2+ and Ba2+ both were very large compared to it, and polymer chains were positioned at about 48° for Ca2+ and in a parallel manner for Ba2+ after forming inter and intrachain metal-carboxylate bonds. Citric acid underwent an esterification reaction with the hydroxyl groups of mannuronate chains. Coagulants stabilized the cross-linking process and formed hydrogen bonds with the polymer chains. Depending on the cross-linkers and coagulants, the fiber diameter ranged from 217 μm to 830 μm and tensile modulus ranged from 88 MPa to 2 MPa. Ca2+, and then Ba2+ ions were more effective as cross-linkers since they produced fibers with superior mechanical properties followed by citric acid and Al3+. For all cross-linkers except citric acid, when DMSO was used as a coagulant, the tensile modulus was the highest. This indicates that DMSO better stabilized the cross-linking process during coagulation. In phosphate buffer saline (PBS), only Ba2+ cross-linked fibers could retain their original structure for 24 h, and fiber formed with coagulant DMSO swelled the least because of its compact structure. It also lost the least percentage of weight during 6 weeks. Thermal properties of the samples were also different as Ba2+ and Ca2+ cross-linked samples were more resistive to high temperature than other samples. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay illustrated the non-cytotoxicity of all the manufactured fibers.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Akim应助菠菜采纳,获得100
1秒前
华仔应助丰富的小白菜采纳,获得10
2秒前
5秒前
6秒前
科目三应助Dudu采纳,获得30
7秒前
仁爱听露完成签到 ,获得积分10
7秒前
8秒前
11秒前
杨杨完成签到 ,获得积分10
11秒前
YY发布了新的文献求助10
12秒前
xuanyu应助费费采纳,获得30
12秒前
英俊的铭应助淡定小白菜采纳,获得10
12秒前
玉玉发布了新的文献求助10
13秒前
青椒超人关注了科研通微信公众号
13秒前
小殷发布了新的文献求助10
15秒前
刘星宇完成签到,获得积分10
17秒前
倩倩完成签到 ,获得积分10
17秒前
Ava应助小殷采纳,获得10
17秒前
科研雪瑞发布了新的文献求助10
18秒前
格拉希尔完成签到,获得积分10
19秒前
19秒前
19秒前
和风发布了新的文献求助10
19秒前
20秒前
喜悦的板凳完成签到 ,获得积分10
20秒前
白菜包子完成签到,获得积分10
21秒前
想跟博哥打篮球完成签到,获得积分20
23秒前
轩海完成签到 ,获得积分10
23秒前
spinning发布了新的文献求助10
24秒前
24秒前
25秒前
白菜包子发布了新的文献求助10
26秒前
玉玉完成签到,获得积分10
30秒前
英姑应助白菜包子采纳,获得10
30秒前
31秒前
32秒前
32秒前
朴素小鸭子完成签到,获得积分10
34秒前
Zhao给Zhao的求助进行了留言
34秒前
Andy完成签到 ,获得积分10
35秒前
高分求助中
Sustainability in Tides Chemistry 1500
TM 5-855-1(Fundamentals of protective design for conventional weapons) 1000
CLSI EP47 Evaluation of Reagent Carryover Effects on Test Results, 1st Edition 800
Threaded Harmony: A Sustainable Approach to Fashion 799
Livre et militantisme : La Cité éditeur 1958-1967 500
Retention of title in secured transactions law from a creditor's perspective: A comparative analysis of selected (non-)functional approaches 500
"Sixth plenary session of the Eighth Central Committee of the Communist Party of China" 400
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3055748
求助须知:如何正确求助?哪些是违规求助? 2712398
关于积分的说明 7431409
捐赠科研通 2357400
什么是DOI,文献DOI怎么找? 1248780
科研通“疑难数据库(出版商)”最低求助积分说明 606786
版权声明 596163