分散染料,温度和线参数对聚 spun 线微纤维脱落的影响
Md Ibrahim H Mondal1, Umme Magreba Takebira1
1Polymer and Textile Research Lab, Department of Applied Chemistry and Chemical Engineering, Rajshahi University, Rajshahi 6205, Bangladesh.
The Science of the total environment
|September 9, 2023
概括
织品染色工厂将大量的微塑料纤维 (MPF) 释放到水生环境中. 这项研究量化了聚丝染过程中的MPF流失,揭示了特定工艺和线类型的更高排放量,超过了典型的废水处理能力.
科学领域:
- 环境科学 环境科学
- 织工程 织工程 织工程
- 材料科学 材料科学 材料科学
背景情况:
- 织品染色工艺是水生生态系统中微塑料纤维 (MPF) 污染的重要来源.
- 了解染过程中的MPF脱落对于减轻环境污染至关重要.
研究的目的:
- 确定影响聚丝染过程中微塑料纤维脱落的因素.
- 在不同的染色条件和线特征下量化MPF释放.
主要方法:
- 在六个聚线染料工厂在正常,载体和高温工艺下对深色和浅色的MPF脱落进行了评估.
- 染料废水使用基于粉的活性炭,花和澄清来处理.
- 识别和量化MPF涉及热针测试,光学显微镜,过,称重和计数.
主要成果:
- 由于MPF脱落而导致的最大体重损失为0.00399%在高温染色中深色的阴影和0.00392%在用较粗的线染色的载体染色中浅色的阴影.
- 通常用浅色调对细线进行染色,导致0.4562毫克L-1的纤维颗粒 (≤0.225毫米) 脱落.
- 较短的纤维长度,更高的denier,和粗的线与增加的MPF排放相关,特别是在深色的高温染色中.
结论:
- 在染过程中脱落的微塑料纤维是MP排放的重要来源,超过了家庭服装洗.
- 传统的废水处理厂仅从织废水中去除大约75.52%的MPF.
- 需要有效的策略来减少织品染色中的MPF释放,以保护生态系统.
相关概念视频
01:20Types of Step-Growth Polymers: Polyesters
2.3K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.3K
01:21Drying Shrinkage
97
When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
A portion of this drying shrinkage can be reversed; if the concrete is...
A portion of this drying shrinkage can be reversed; if the concrete is...
97