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Fiber Spinning from Cellulose Solutions in Imidazolium Ionic Liquids: Effects of Natural Antioxidants on Molecular Weight, Dope Discoloration, and Yellowing Behavior. FIBERS 2022. [DOI: 10.3390/fib10060050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Spinning of cellulosic fibers requires the prior dissolution of cellulose. 3-Alkyl-1-methylimidazolium ionic liquids have proven to be suitable solvents for that purpose, but the degradation of cellulose in the spinning dope can be severe. Suitable stabilizers are therefore required that prevent cellulose degradation, but do not adversely affect spinnability or the long-term yellowing behavior of the fibers. A group of twelve renewables-based antioxidants was selected for stabilizing 5% cellulose solutions in the ionic liquids and their effects on cellulose integrity, dope discoloration, and aging behavior were tested by gel permeation chromatography (GPC) and ISO brightness measurements. Propyl gallate (a gallic acid derivative), hydroxytyrosol (from olives), and tocopheramines (a vitamin E derivative) performed best in the three test categories, minimizing both cellulose degradation, chromophore formation in the spinning dope, and yellowing upon accelerating aging of the spun fibers. The use of these stabilizers for cellulose solutions in the imidazolium-based solvent system can therefore be recommended from the point of view of both performance and sustainability.
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Xu Z, Yao Y, Sheng J, Li Z, Yang Q, Yan Z, Zhang Y. Rheology of Cellulose/Alginic Acid Blends with 1‐Allyl‐3‐Methylimidazolium Chloride as Solvent. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhi Xu
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology, Zhejiang ProvinceJiaxing University Zhejiang Jiaxing China
| | - Yongbo Yao
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology, Zhejiang ProvinceJiaxing University Zhejiang Jiaxing China
| | - Junlu Sheng
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology, Zhejiang ProvinceJiaxing University Zhejiang Jiaxing China
| | - Zhe Li
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology, Zhejiang ProvinceJiaxing University Zhejiang Jiaxing China
| | - Qun Yang
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology, Zhejiang ProvinceJiaxing University Zhejiang Jiaxing China
- Fashion collegeShanghai University of Engineering Science Shanghai China
| | - Zhiyong Yan
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology, Zhejiang ProvinceJiaxing University Zhejiang Jiaxing China
| | - Yumei Zhang
- Key Laboratory of High Performance Fibers & Products, Ministry of Education, College of Materials Science and EngineeringDonghua University Shanghai China
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