棉纤维在理过程中的机械性能和物理化学特性
Yuhua Shi1, Liuyuan Geng1, Pengwei Fan1
1Collage of Mechanical and Electrical Engineering, Tarim University, Alar, Xinjiang 843300, China; Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region, Alar, Xinjiang 843300, China.
International journal of biological macromolecules
|February 7, 2024
概括
棉纤维最初会增强机械性能和结晶性,但延长加工会导致表面损伤和由于纤维素链断裂而降低强度. 这在原子层面影响了纤维质量.
科学领域:
- 材料科学 材料科学 材料科学
- 织工程 织工程 织工程
- 物理化学 物理化学
背景情况:
- 棉纤维质量对于织应用至关重要.
- 了解机械加工对纤维特性的影响对于优化织品生产至关重要.
- 以前的研究还没有完全阐明理过程中棉纤维的原子级变化.
研究的目的:
- 分析理过程中棉纤维的机械性能和表面损伤.
- 为了研究由于机械损坏而导致的原子级物理和化学性质变化.
- 为了将理引起的变化与纤维强度和结晶性相关联.
主要方法:
- 棉纤维的实验分析 (原棉,第一,第二,第三理棉).
- 分子动力学模拟用于研究原子级相互作用.
- 测量破裂强度和X射线衍射的晶度 (CrI).
主要成果:
- 机械性能和结晶性最初增加,然后随着连续的理而下降.
- 表面撕裂增加,而C-O结合能降低.
- 断裂强度有所变化: +7.4% (第一个CC), -11% (第二个CC), -7.7% (第三个CC).
- 结晶度: 70.8% (RC),75.3% (第一个CC),72.7% (第二个CC),71.8% (第三个CC).
- 理在无形区域中破坏了C-O和C-C键,导致纤维素链断裂和强度降低.
结论:
- 理会导致棉纤维结构和特性发生显著变化.
- 优化理是必要的,以平衡改善的纤维对齐与最小化机械损坏.
- 原子级键变化解释了理棉纤维中观察到的宏观性质变化.
相关概念视频
01:18Mechanical Characteristics of Steel
576
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
576
01:19Fineness Modulus
407
The fineness modulus (FM) of aggregate is a numerical index that measures the coarseness or fineness of the particles. It is calculated by adding the cumulative percentages of aggregate retained on each of a specified series of sieves and dividing the sum by 100.
Consider performing sieve analysis on sand through a set of ASTM sieves. The weight of aggregate retained in each sieve and pan placed at the bottom is recorded, as given in Column B of Table 1.
To determine the fineness modulus of...
Consider performing sieve analysis on sand through a set of ASTM sieves. The weight of aggregate retained in each sieve and pan placed at the bottom is recorded, as given in Column B of Table 1.
To determine the fineness modulus of...
407
01:21Characteristics of Dry Friction
576
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
576