纺织学报 ›› 2019, Vol. 40 ›› Issue (05): 1-6.doi: 10.13475/j.fzxb.20180607806

• 纤维材料 •    下一篇

改性菠萝叶纤维结构及其吸附甲醛性能

何俊燕, 李明福(), 张劲, 庄志凯, 连文伟   

  1. 中国热带农业科学院 农业机械研究所, 广东 湛江 524091
  • 收稿日期:2018-06-25 修回日期:2019-01-04 出版日期:2019-05-15 发布日期:2019-05-21
  • 通讯作者: 李明福
  • 作者简介:何俊燕(1983—),女,助理研究员,硕士。主要研究方向为热带农业废弃物材料利用。
  • 基金资助:
    广东省自然科学基金项目(2016A030307001);中国热带农业科学院基本科研业务费专项资金项目(1630132017008);中国热带农业科学院基本科研业务费专项资金项目(1630062015014);中国热带农业科学院基本科研业务费专项资金项目(1630132018002);湛江市科技计划项目(2017A03015)

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

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摘要：

为获得具有高吸附性能的纺织材料,以脱胶菠萝叶纤维为吸附载体,氯化血红素为改性剂,经酯化反应制备了改性菠萝叶纤维。借助扫描电子显微镜、傅里叶红外光谱仪、X射线衍射仪、比表面积及孔径分析仪对改性菠萝叶纤维结构进行表征,并研究其吸附甲醛性能。结果表明:改性菠萝叶纤维表面接枝了氯化血红素,属于Ⅰ型纤维素,其相对结晶度由69.3%下降到66.2%;改性菠萝叶纤维的氮气吸附等温线属于Ⅲ型吸附,有少量孔径为2.0~276.1 nm的中孔与大孔,其比表面积、氮气吸附量、滞后环均变小;改性菠萝叶纤维对甲醛的吸附性好于菠萝叶纤维,其吸附甲醛性能随着甲醛初始浓度的增加而降低,随着纤维用量、反应温度和反应时间的增加而提高。

关键词: 脱胶菠萝叶纤维, 接枝改性, 氯化血红素, 吸附性能, 甲醛

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

中图分类号: 

  • TS102.6

图1

菠萝叶纤维改性前后的表面形态(×10 000)"

图2

菠萝叶纤维改性前后的红外光谱图"

图3

菠萝叶纤维改性前后的X射线衍射图"

图4

菠萝叶纤维改性前后的氮气吸附-脱附等温线"

表1

菠萝叶纤维改性前后的孔结构"

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

图5

菠萝叶纤维改性前后的孔径分布"

图6

甲醛初始质量浓度对改性前后菠萝叶纤维甲醛去除率的影响"

图7

纤维用量对甲醛去除率的影响"

图8

反应温度对甲醛去除率的影响"

图9

反应时间对甲醛去除率的影响"

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