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Cellulose and Pectic Polysaccharides01:15

Cellulose and Pectic Polysaccharides

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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
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Manufacturing Of Robust Natural Fiber Preforms Utilizing Bacterial Cellulose as Binder
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高性能纤维素/热塑性聚氨复合材料,可通过相互作用调节的纤维素再生来实现.

Yuhui Ci1, Dong Lv2, Xiangjian Yang1

  • 1National Engineering Laboratory of Textile Fiber Materials and Processing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, PR China.

Carbohydrate polymers
|September 8, 2024
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概括

研究人员开发了一种新的方法,可以将纤维素和热塑性聚氨 (TPU) 一起溶解,从而创建先进的复合材料. 这一突破使得强,透明的纤维素/TPU薄膜和纤维具有调节性能的生产成为可能.

关键词:
纤维素纤维素是一种纤维素.解散 解散 解散 是一个过程.机械性质 机械性质再生再生再生的过程热塑性聚氨是一种热塑性聚氨.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 生物材料工程 生物材料工程

背景情况:

  • 在高性能复合材料中,纤维素和聚合物之间实现强大的界面粘附是至关重要的.
  • 纤维素和聚合物的均溶解是复合材料制造的关键挑战.

研究的目的:

  • 开发一种方法,使纤维素和热塑性聚氨 (TPU) 同时均溶解.
  • 准备和表征纤维素/TPU复合膜和纤维具有增强的特性.

主要方法:

  • 纤维素和TPU同时溶解在1,8-diazabicyclo(5.4.0) undec-7-ene氨酸/二甲基硫氧化物 ([DBUH]Lev/DMSO) 中.
  • 相互作用调节的纤维素再生用于复合材料的形成.
  • 密度函数理论计算和实验性表征 (例如,机械测试,透明度测量).

主要成果:

  • [DBUH]Lev/DMSO溶剂系统使纤维素和TPU的温和,均溶解成为可能.
  • 由此产生的纤维素/TPU溶液表现出适合加工成薄膜和纤维的质性 (温度敏感性,剪切薄化,粘性弹性).
  • C90T10复合膜 (90%纤维素/10%TPU) 显示出高透明度 (90%在800nm) 和优良的机械性能 (抗拉强度:176MPa;破裂时的延伸:8.1%).
  • C90T10复合纤维的最大抗拉强度为214 MPa,破裂时的延伸率为48.1%.

结论:

  • 建立了一种在分子层面生产均纤维素/TPU复合材料的可行方法.
  • 开发的过程有助于创建具有可调节性质的环保复合材料.
  • 这种方法有可能为各种应用设计基于纤维素的先进材料.