Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (05): 1-6.doi: 10.13475/j.fzxb.20180607806

• Fiber Materials •     Next Articles

Structure and formaldehyde adsorption properties of modified pineapple leaf fiber

HE Junyan, LI Mingfu(), ZHANG Jin, ZHUANG Zhikai, LIAN Wenwei   

  1. Institute of Agricultural Machinery, Chinese Academy of Tropical Agricultural Sciences,Zhanjiang, Guangdong 524091, China
  • Received:2018-06-25 Revised:2019-01-04 Online:2019-05-15 Published:2019-05-21
  • Contact: LI Mingfu E-mail:limingfu378@163.com

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Abstract:

In order to obtain high-absorption textile materials, the modified materials of degummed pineapple leaf fiber were prepared by esterification reaction using degummed pineapple leaf fiber as an adsorption carrier and hemin as modifier. The structure of the fiber was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffractometer, surface area and porosimetry analyzer, and the formaldehyde adsorption properties were also studied. The results show that the surface of the modified fiber is grafted with hemin. It has the crystal structure of cellulose I. The relative crystallinity is decreased from 69.3% to 66.2%. The N2 adsorption isotherm belongs to type III adsorption. The modified fibers have a small number of mesopores and macropores with pore size ranged from 2.0 to 276.1 nm. The specific surface area, nitrogen adsorption and hysteresis loop are all decreased after modification. The modified degummed pineapple leaf fiber has better formaldehyde adsorption performance than the unmodified fiber. The formaldehyde adsorption capability of modified fiber decreases with the increase of the initial formaldehyde concentration, and increases with the increase of fiber dosage, reaction temperature and reaction time.

Key words: degummed pineapple leaf fiber, grafting modification, hemin, adsorption, formaldehyde

CLC Number: 

  • TS102.6

Fig.1

Surface morphology of degummed pineapple leaf fiber before (a) and after (b) modification(×10 000)"

Fig.2

FT-IR spectra of degummed pineapple leaf fiber before and after modification"

Fig.3

XRD patterns of degummed pineapple leaf fiber before and after modification"

Fig.4

N2 adsorption-desorption isotherms of degummed pineapple leaf fiber before and after modification"

Tab.1

Pore structure of degummed pineapple leaf fiber before and after modification"

样品名称 比表面积/
(m2·g-1)		 孔体积/
(cm3·g-1)		 平均孔直径/
nm
菠萝叶纤维 0.73 0.01 25.52
改性菠萝叶纤维 0.71 0.01 26.50

Fig.5

Pore size distribution of degummed pineapple leaf fiber before and after modification"

Fig.6

Influence of initial formaldehyde concentration on formaldehyde removal rate of degummed pineapple leaf fiber before and after modification"

Fig.7

Influence of fiber dosage on removal rate of formaldehyde"

Fig.8

Influence of reaction temperature on removal rate of formaldehyde"

Fig.9

Influrnce of reaction time on removal rate of formaldehyde"

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