Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (09): 136-142.doi: 10.13475/j.fzxb.20180904807

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Decolorization pretreatment method of quality inspection extraction solution based on nanofiltration technology

HAN Jianjian, HU Yongjie(), HU Minzhuan   

  1. Guangdong Testing Institute of Product Quality Supervision, Guangzhou, Guangdong 510670, China
  • Received:2018-09-18 Revised:2019-06-17 Online:2019-09-15 Published:2019-09-23
  • Contact: HU Yongjie E-mail:153978565@qq.com

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Abstract:

In order to improve the efficiency and accuracy of formaldehyde detection of textiles and leathers, based on the interfacial polymerization, polyamide and inorganic particles prepared by St?ber method was adopted to prepare organic-inorganic hybrid nanofiltration membranes for the decolorization pretreatment of textiles and leathers extract. The particle morphology, surface elements of nanofiltration membranes and contact angle of separation layer were analyzed by using scanning electron microscopy, X-ray photoelectron spectrometry and contact angle metering, respectively. The separation performance of nanofiltration membranes was investigated by pure water flux, inorganic salt and dye retention. The recoveries of formaldehyde detection in textiles and leathers by nanofiltration decoloring pretreatment were also analyzed. Results show that the silicon and silver ion modified silica with uniform particle size are successfully loaded on the nanofiltration membrane separation layer, and the separation layer has good hydrophilicity. The pure water flux of the nanofiltration membrane is improved by virtue of the addition of a moderate amount of particles. The silver ion modified silica improves the entrapment performance of nanofiltration membrane for salt with bivalent cation and cationic dye, and the recoveries meet the requirements of formaldehyde detection of textiles and leathers.

Key words: dark textile, leather, formaldehyde detection, decolorization pretreatment, nanofiltration, silica dioxide

CLC Number: 

  • TS101.914

Tab.1

Types and key parameters of dyes"

染料名称 类型 分子式 摩尔质量/
(g·mol-1)		 最大吸
收波长/
nm
日落黄 阴离子型 C16H10N2Na2O7S2 452.4 482
酸性红B 阴离子型 C20H12N2Na2O7S2 502.4 510
阳离子红X-GTL 阳离子型 C20H18ClN5O6S 502.0 530
罗丹明B 阳离子型 C28H31ClN2O3 479.0 560

Fig.1

Morphology analysis of Ag+-SiO2(×10 000)"

Fig.2

Elements analysis of separation layer surface of SA-PA membrane. (a)Full spectrum analysis;(b)Narrow spectrum analysis of silicon elements;(c)Narrow spectrum analysis of silver elements"

Fig.3

Contact angle analysis of membrane separation layer surface"

Fig.4

Molecular weight cut off of three nanofiltration membranes"

Fig.5

Influence of particle content on pure water flux of hybrid nanofiltration membranes"

Tab.2

Retention properties of nanofiltration membranes on various inorganic salts"

无机盐
种类		 通量J/(L·m-2·h-1) 截留率R/%
PA膜 S-PA膜 SA-PA膜 PA膜 S-PA膜 SA-PA膜
NaCl 10.85 13.06 13.25 38.3 40.6 52.5
MgCl2 10.78 12.83 12.78 50.3 57.5 92.6
Na2SO4 10.75 12.81 12.98 46.2 48.7 70.2
MgSO4 10.66 12.57 12.63 65.3 69.6 90.3

Tab.3

Retention property of nanofiltration membranes on various dyes"

染料名称 染料质量浓度/
(mg·kg-1)		 通量J/(L·m-2·h-1) 截留率R/%
PA膜 S-PA膜 SA-PA膜 PA膜 S-PA膜 SA-PA膜
50 10.91 13.04 13.28 96.1 96.9 96.0
日落黄 100 10.85 13.06 13.25 96.9 97.2 96.1
500 10.79 12.97 13.06 97.8 98.1 97.2
50 10.75 12.85 12.74 97.9 98.4 97.1
酸性红B 100 10.78 12.83 12.78 98.3 98.6 97.5
500 10.73 12.77 12.72 98.8 99.1 97.8
50 10.78 12.81 12.95 98.0 97.9 99.5
阳离子红X-GTL 100 10.75 12.81 12.98 98.1 98.3 99.8
500 10.77 12.78 12.93 98.3 98.5 99.8
50 10.67 12.59 12.68 97.0 97.3 99.0
罗丹明B 100 10.66 12.57 12.63 97.2 97.9 99.3
500 10.68 12.55 12.60 97.5 98.1 99.6

Tab.4

Analysis of formaldehyde recoveries"

预处理
用膜		 加标量/
(mg·kg-1)		 回收率/%
50 mg/L 100 mg/L 500 mg/L
20 99.5 99.1 100.2
PA膜 75 100.5 102.5 98.7
300 99.3 98.8 102.1
20 100.2 104.9 99.8
S-PA膜 75 99.7 98.6 101.2
300 102.1 101.1 99.5
20 98.7 95.7 101.6
SA-PA膜 75 101.3 100.0 99.4
300 98.9 99.6 102.3
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