纺织学报 ›› 2021, Vol. 42 ›› Issue (02): 47-52.doi: 10.13475/j.fzxb.20201005507

• 纤维材料 • 上一篇    下一篇

亚麻分层纳米纤维素的制备及其增强热电复合材料性能

胡静1, 张开威2, 李冉冉1, 林金友3, 刘宇清1()   

  1. 1.苏州大学 纺织与服装工程学院, 江苏 苏州 215123
    2.愉悦家纺有限公司, 山东 滨州 256600
    3.中国科学院上海应用物理研究所, 上海 201800
  • 收稿日期:2020-10-26 修回日期:2020-11-12 出版日期:2021-02-15 发布日期:2021-02-23
  • 通讯作者: 刘宇清
  • 作者简介:胡静(1995—),女,硕士生。主要研究方向为生物质智能纤维材料。
  • 基金资助:
    国家自然科学基金项目(51773221);中国科学院青年创新促进会基金项目(2017308)

Preparation of flax layered nano-cellulose and properties of its reinforced thermoelectric composites

HU Jing1, ZHANG Kaiwei2, LI Ranran1, LIN Jinyou3, LIU Yuqing1()   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, China
    2. Yuyue Home Textile Co., Ltd., Binzhou, Shandong 256600, China
    3. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2020-10-26 Revised:2020-11-12 Online:2021-02-15 Published:2021-02-23
  • Contact: LIU Yuqing

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摘要：

为从天然亚麻纤维中制备出分层纳米纤维素(即纤维素纳米纤维(CNF)与纤维素纳米晶(CNC)共存),并对其制备方法进行优化完善,提出将亚麻纤维在特定浓度的氢氧化钠溶液中碱化处理后,再进行四甲基哌啶氮氧化物(TEMPO)介导的三元氧化和机械处理的联合处理方法。然后将亚麻CNF与石墨烯复合制备CNF/石墨烯复合薄膜并研究亚麻CNF增强热电复合材料的性能。结果表明:碱化预处理使亚麻纤维直径变细,长度变短,半纤维素被脱除,是生成不同尺寸CNF的重要步骤;随着氢氧化钠用量在0~18%范围内的增加,所得CNF悬浮液的光透过率从3.7%增加到95.1%;CNF/石墨烯复合膜表现出最高功率因子,为8.0×10 -3 μW/(m·K 2),表明复合薄膜具有热电性能。

关键词: 纳米纤维素, 复合薄膜, 增强热电复合材料, 亚麻纤维, 石墨烯

Abstract:

In order to prepare layered nano-cellulose from natural flax fiber, i.e. coexistence of cellulose nanofiber (CNF) and cellulose nanocrystalline (CNC), and improve the preparation method of CNF from flax fiber, a method of alkaline treatment of flax fiber in a specific concentration of sodium hydroxide solution, followed by tempo mediated ternary oxidation and mechanical treatment, was proposed. The CNF/graphene composite films were prepared by compounding flax CNF with graphene to study the properties of flax CNF reinforced thermoelectric composites. The results show that the diameter and length of flax fiber become smaller and the hemicellulose is removed after alkaline pretreatment, which is an important step towards generation of CNF with different sizes. The optical transmittance of CNF suspension increases from 3.7% to 95.1% with the increase of NaOH concentration in the range of 0-18%, and the highest power factor of CNF/graphene composite film is 8.0 × 10 -3 μW/(M·K 2), which indicates that the composite film has thermoelectric properties.

Key words: nano-cellulose, composite film, reinforced thermoelectric composite, flax fiber, graphene

中图分类号: 

  • TS102.221

图1

不同质量分数NaOH溶液碱化亚麻纤维的光学显微镜照片"

图2

不同质量分数NaOH 溶液碱化亚麻纤维的SEM照片"

图3

不同质量分数NaOH溶液碱化 亚麻的FT-IR光谱"

图4

不同质量分数NaOH溶液碱化亚麻的XRD谱图 注:标注的数据为对应亚麻纤维的计算后的结晶度指数和纤维素Ⅱ含量。"

图5

FF-CNF 水悬浮液的紫外-可见光谱和光学照片"

图6

FF-CNF 水性悬浮液的光学显微镜照片"

图7

FF-CNF薄膜的光学显微镜照片"

图8

FF-CNF薄膜的紫外-可见光谱和光学照片"

图9

石墨烯/CNF复合薄膜制备流程"

表1

石墨烯/CNF复合薄膜的热电性能"

石墨烯质
量分数/%		 电导率/
(S·m-1)		 塞贝克系数/
(μV·K-1)		 功率因子/
(10-4μW·m-1·K-2)
10.0 3.0 12.8 4.8
20.0 8.1 23.0 41.0
30.0 11.0 26.9 80.0
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