Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (10): 94-100.doi: 10.13475/j.fzxb.20200101907

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Modification of down by zirconium ion with phytic acid and its thermal insulation performance

YING Lili1, LI Changlong1, WANG Zongqian1(), WANG Dengfeng1, WU Kaiming2, XIE Wei2, CHENG Huan1   

  1. 1. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
    2. Anhui Guqi Down Material Incorporated Company, Wuhu, Anhui 241008, China
  • Received:2020-01-14 Revised:2020-07-09 Online:2020-10-15 Published:2020-10-27
  • Contact: WANG Zongqian E-mail:wzqkeyan@126.com

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Abstract:

Zirconium ion (Zr4+) modification can improve the thermal insulation of down. For further improving the Zr4+ load to shorten the modification process, the Zr4+modified functional down was prepared through phytic acid pretreatment and direct impregnation with zirconium sulfate solution based on chelating adsorption. The modified down was characterized by scanning electron microscope, X-ray diffraction spectrometer, inductively coupled plasma spectrometer and infrared spectroscopy and so on. Meanwhile, far-infrared radiation calorimeter and flat insulation meter were used to test the infrared temperature rise and thermal insulation performance of down before and after modification. The results show that the original feather twigs and the angles are not damaged by the Zr4+ modification with the pretreatment of phytic acid, while the fluffy, cleanliness and residual fat ratio of modified down are found to meet the requirements of the down standard. The adsorption capacity to Zr4+of the treated down is significantly enhanced, and the infrared temperature rise and heat preservation coefficient of the modified down are increased by 40% and 8.1%, respectively. The Zr4+, phytic acid and down fibers are mainly combined by covalent chelation, which has excellent washing fastness, and the load of Zr4+ on down fibers maintains a high level after 9 times of washing.

Key words: down, phytic acid, zirconium ion, thermal insulation performance, thermal insulation mechanism

CLC Number: 

  • TS959.16

Fig.1

Morphology of down before and after modification. (a)Macro morphology of down; (b)Macro morphology of modified down; (c)SEM of down silk(×4 000); (d)SEM of modified down silk(×4 000); (e)SEM of down twigs(×4 000); (f)SEM of modified down twigs(×4 000); (g)SEM of down ruffle(×6 000); (h)SEM of modified down ruffle(×6 000)"

Tab.1

Element distribution of down before andafter modification%"

试样名称 C N O P Zr
羽绒原样 42.45 36.88 20.66
Zr4+修饰羽绒 45.84 21.65 19.03 5.21 8.27

Fig.2

EDS element density distribution of modified down"

Fig.3

FT-IR spectra of different down samples"

Fig.4

XRD spectra of different down samples"

Fig.5

Standard curve of Zr4+in water"

Tab.2

Adsorption of Zr4+ on different down samples"

样品名称 残液Zr4+浓度/
(mg·L-1)		 Zr4+吸附量/
(mg·g-1)		 相对标
准偏差
羽绒原样 36.50 4.50 0.81
预处理羽绒 2.04 16.0 1.94

Fig.6

Effect of wash times on adsorption of Zr4+ on modified down"

Fig.7

Infrared temperature rise curves(a) and mechanism(b) of modified down"

Tab.3

Thermal insulation performance of different down samples"

样品名称 保暖率/% 克罗值
羽绒原样 73.8 2.251
Zr4+修饰羽绒 81.9 2.936

Tab.4

Effect of modification on index of down"

类型 蓬松
度/cm		 耗氧量/
(mg·(100 g)-1)		 清洁
度/mm		 残脂
率/%		 外观 气
味
羽绒原样 18.6 5.5 950 0.95 白色 无
Zr4+修饰羽绒 18.2 5.6 950 0.90 轻微色 无
国标要求 ≥16.5 ≤5.6 ≥500 ≤1.2 — 无
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