Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (02): 119-124.doi: 10.13475/j.fzxb.20181005906

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Effect of ultrasonic assistance on morphology of silk fibroin microspheres prepared by emulsion cross-linking process

WANG Zongqian1,2(), WANG Dengfeng1, ZHOU Hang2, LI Jun1   

  1. 1. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
    2. The Technical Center of Textile Dyeing and Finishing of Anhui Province, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Received:2018-10-30 Revised:2018-11-03 Online:2019-02-15 Published:2019-02-01

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Abstract:

In order to solve the easy aggregation and nonuniform particle size distribution of silk fibroin blank microspheres prepared by emulsion cross-linking process, ultrasonic assistance was employed in the emulsion cross-linking process. The particle size distribution and the morphology of microspheres were measured by laser particle size analyzer and scanning electron microscopy. The results show that in the absence of the ultrasonic assistance, the microspheres prepared by emulsion cross-linking process have the average particle size of 15.08 μm with the standard deviation (SD) value of 0.515, and the aggregation is very obvious. However, in the presence of ultrasonic assistance, the average particle size decreases with the increase of ultrasonic frequency and ultrasonic power. The particle size of the microspheres prepared in the presence of the ultrasonic assistance at 45 kHz and 100 W reduces to 26% of the original one. The SD value of microspheres also decreases, indicating that ultrasonic assistance can significantly reduce the aggregation of the microspheres and promote the uniform distribution of the particle size of the microspheres.

Key words: emulsification crosslinking process, silk fibroin, blank microsphere, ultrasonic, particle size distribution

CLC Number: 

  • R318.08

Fig.1

Molecular weight distribution of silk fibroin. (a) Original image; (b) Schematic diagram"

Fig.2

Particle size distribution of blank microspheres"

Fig.3

Morphology of blank microspheres. (a) Microsphere aggregation(×500); (b) Amplification of microsphere aggregation(×1 000)"

Tab.1

Impact of ultrasonic frequency on size distribution of blank microspheres"

频率/kHz 平均粒径/μm 体积百分比*/% 标准偏差
28 11.02 28.15 0.459
45 8.52 30.24 0.436
80 3.34 32.31 0.414

Fig.4

Impact of ultrasonic frequency on morphology of microspheres(×500)"

Tab.2

Impact of ultrasonic power size distribution of blank microspheres"

功率/W 平均粒径/μm 体积百分比/% 标准偏差
40 8.52 30.24 0.436
60 7.21 30.39 0.428
80 5.92 31.04 0.421
100 4.07 31.78 0.415

Fig.5

Impact of ultrasonic power on morphology of microspheres"

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