Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (02): 33-38.doi: 10.13475/j.fzxb.20181107206

• Fiber Materials • Previous Articles     Next Articles

Characterization on distribution of TiO2 particles in opaque polyester and dull nylon filaments

XING Dandan1, WANG Ni1(), LIU Huyi2, GAN Xuehui3, SHI Meiwu4   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. Suzhou Longjie Special Fiber Co., Ltd.,Zhangjiagang, Jiangsu 215600, China
    3. College of Mechanical Engineering, Donghua University, Shanghai 201620,China
    4. Institute of Military Engineering, Academy of Military Sciences, Beijing 100082, China
  • Received:2018-11-29 Revised:2019-11-27 Online:2020-02-15 Published:2020-02-21
  • Contact: WANG Ni E-mail:wangni@dhu.edu.cn

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Abstract:

In view of the current lack of corresponding characterization methods for the distribution of particles in functional fibers prepared by blending, a new refractive index method for making transparent fibers by preparing a solution with the same refractive index as the fiber was proposed. This new method was used to measure TiO2 distribution in opaque polyester fibers and dull polyamide fibers. In this research, scanning electron microscopy was used to characterize the distribution of the TiO2 particles in both the cross-sectional and the longitudinal surface of the fiber, while the three-dimensional imaging of nano-C technology was used for 3-D reconstruction of fibers. The results show that compared with the scanning electron microscopy that can only show the distribution of TiO2 in a small range, the refractive index method has certain feasibility in characterizing the distribution of blended particles in fibers. The results of nano-CT imaging after 3-D reconstruction can be used to count the blended particles and the particle size distributions. The experimental results of the three testing methods show that the agglomeration of inorganic particles in the fiber is more easily caused by master batch spinning than slicing spinning.

Key words: nano-CT technique, refractive index method, particle distribution, opaque polyester, dull nylon filament

CLC Number: 

  • TS176

Tab.1

Refractive index of mixed solution"

纤维 ɑ-溴代萘体积/mL 石蜡油体积/mL 混合溶液折射率
8.00 0 1.658
6.74 1.26 1.628
聚酯 5.47 2.53 1.598
4.21 3.79 1.568
2.95 5.05 1.538
1.68 6.32 1.508
5.30 2.70 1.594
4.21 3.79 1.568
聚酯酰6 3.12 4.88 1.542
2.00 6.00 1.515
0.88 7.12 1.489

Fig.1

SEM images of cross section and surface of opaque polyester and dull polyamide. (a)1# cross section(×5 000);(b)1# surface(×5 000);(c)2# cross section(×5 000);(d)2# surface(×5 000);(e)3# crosssection(×1 800);(f)3# surface(×1 500);(g)4# cross section(×1 800);(h)4# surface(×1 500)"

Fig.2

Tomography maps and reconstructed 3-D images of opaque polyester. (a)Tomography map of 1#;(b)Tomography map of 2#;(c)Reconstructed 3-D image of 1#;(d)Reconstructed 3-D image of 2#"

Fig.3

Tomography maps and reconstructed 3-D images dull of polyamide 6. (a)Tomography map of 3#;(b)Tomography map of 4#;(c)Reconstructed 3-D image of 3#;(d)Reconstructed 3-D image of 4#"

Fig.4

TiO2 particle size distribution in opaque polyester(a)and dull polyamide(b)fiber"

Fig.5

Light transmittance of opaque polyester fiber and dull polyamide in solutions"

Fig.6

Optical microscope images of opaque polyester fibers(×40). (a)1# in water;(b)1# in solution;(c)2# in water;(d)2# in solution"

Fig.7

Optical microscope images of dull polyamide 6(×20). (a)3# in water;(b)3# in solution;(c)4# in water;(d)4# in solution"

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