Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (10): 116-121.doi: 10.13475/j.fzxb.20190904606

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Preparation and characterization of conductive polyester nonwovens

WANG Qiuping, ZHANG Ruiping(), LI Chenghong, ZHANG Gecheng   

  1. Nantong University, Nantong, Jiangsu 226019, China
  • Received:2019-09-16 Revised:2020-07-14 Online:2020-10-15 Published:2020-10-27
  • Contact: ZHANG Ruiping E-mail:zhang.rp@ntu.edu.cn

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Abstract:

In order to develop intelligent flexible sensors and metallized conductive textile materials with special protection functions, nickel-plated polyester nonwovens were prepared by high-temperature palladium-free active nickel source and electroless plating. The effects of plating temperature, pH value, plating time and main salt concentration on the resistance of polyester nonwovens were analyzed, and the best plating parameters was optimized. The conductivity, heat preservation and electromagnetic radiation resistance of the coated nonwovens were tested. The results show that the optimal condition for electroless plating process of nonwoven fabrics is as follows: the concentration of the main salt of electroless nickel plating is 0.1 mol/L, the plating temperature is 50 ℃, the pH value is 9, and the time is 60 min. The resistance of nickel-plated nonwovens decreases to 0.114 Ω/□, indicating excellent conductivity. After nickel plating, the thermal resistance of nonwovens is improved, the clo value is increased, the heat transfer coefficient decreases, and the shielding efficiency increase in the range of 100-3 000 MHz, which has better heat preservation and anti-electromagnetic radiation performance. The coating on the surface of polyester fibers is found compact and smooth, and the main component of the coating is nickel.

Key words: electroless plating, polyester nonwoven fabric, conductive material, warmth retention, anti-electromagnetic radiation

CLC Number: 

  • TS195.5

Fig.1

DSC spectra of nickel acetate,sodium phosphate and mixture"

Tab.1

Electric resistance of nickel-plated nonwoven fabrics at different temperature"

温度/℃ 方阻/(Ω·□-1) 温度/℃ 方阻/(Ω·□-1)
30 0.571 70 0.406
50 0.250 90 0.649

Tab.2

Electric resistance of nickel-plated nonwoven fabrics at different pH value"

pH值 方阻/(Ω·□-1)
7 1.322
8 0.434
9 0.114
10 0.148
11 0.177

Tab.3

Electric resistance of nickel-plated nonwoven fabrics at different times"

时间/min 方阻/(Ω·□-1)
30 1.000
45 0.966
60 0.114
75 0.640
90 0.650

Fig.2

Conductive schematic diagram of nonwovens before(a) and after(b) nickel plating"

Tab.4

Warmth retention of nonwovens before and after nickel plating"

试样 试样厚度/mm 热阻/(m2·K·W-1) 克罗值/(m2·K·W-1) 热导率/(W·m-1·K-1) 传热系数/(W·m-2·K-1)
镀镍前非织造布 0.160 0.050 0.323 0.003 19.960
镀镍非织造布 0.260 0.070 0.455 0.003 14.186

Fig.3

Electromagnetic radiation resistance of nonwovens before and after nickel plating"

Fig.4

SEM images of non-woven fabrics before and after nickel plating. (a)Nonwoven fabrics(×3 000);(b) Nickel- plated nonwoven fabrics(×500);(c) Nickel-plated non-woven fabrics(×3 000); (d)Nickel-plated nonwoven fabrics(×15 000)"

Fig.5

EDS of surface elements after nickel plating"

Tab.5

Element content of nickel-plated nonwovens %"

元素 质量分数 原子分数
C 18.87 53.24
O 2.08 4.41
P 7.67 8.39
Ni 53.53 30.00
Au 17.85 3.07
总量 100.00 100.00
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