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Microtubules are small hollow tubes in eukaryotic cells. The cell wall microtubules are polymerized dimers of two globular proteins, α-tubulin and β-tubulin, two globular proteins. With a diameter of about 25 nm, microtubules are the widest components of the cytoskeleton. They help the cell resist compression and provide a track along which vesicles move through the cell or pull replicated chromosomes to opposite ends of a dividing cell. Microtubules go through quick cycles of...
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喷雾干燥酶处理的纤维素纳米纤维

Sungjun Hwang1,2, Colleen C Walker3, Donna Johnson3

  • 1Advanced Structures and Composites Center, University of Maine, 35 Flagstaff Road, Orono, ME 04469-5793, USA.

Polymers
|October 28, 2023
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概括

酶处理减少了生产纤维素纳米纤维素 (CNFs) 所需的能量. 用酶处理的CNF保持了聚烯复合材料的强度,提供了可持续的材料增强.

关键词:
纤维素纳米纤维的纤维素纳米纤维.酶处理是一种酶处理.聚烯聚烯的使用方法喷雾干燥方式 喷雾干燥方式

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科学领域:

  • 材料科学 材料科学 材料科学
  • 生物技术是生物技术.
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 纤维素纳米纤维 (CNFs) 提供了增强的材料性能,但需要大量的能量进行加工.
  • 酶性预处理是一种提高CNF可加工性和减少能源消耗的潜在方法.
  • 优化CNF生产对于它们在复合材料中的更广泛应用至关重要.

研究的目的:

  • 评估精炼和喷雾干燥过程中用酶处理的CNF的可加工性和能源需求.
  • 研究酶预处理对CNF及其衍生复合材料的形态和机械性能的影响.
  • 为了比较用酶处理的CNF与未处理的CNF在聚烯 (PP) 基质复合材料中的性能.

主要方法:

  • 使用实验室规模的质量合剂与内葡萄糖酶处理,从漂白 kraft 纸 (BKP) 生产 CNF.
  • 在CNF提炼过程中确定净能耗,聚合度 (DP) 和粘度.
  • 用酶预处理的喷雾干燥CNF (SDCNF) 粉末的形态特征.
  • 使用双螺杆挤出机将酶预处理的SDCNF合成PP矩阵,并与化物接种聚烯 (MAPP) 进行配合.
  • 评估产生的PP-CNF复合材料的机械性能.

主要成果:

  • 酶处理显著降低了在CNF提炼过程中达到目标罚款水平所需的能源消耗.
  • 酶治疗导致CNF的聚合度和粘度下降.
  • 将酶预处理的SDCNF添加到PP矩阵中保持了复合材料的增强强度特性.
  • 用酶预处理的SDCNFs的形态特性被用于复合应用的特征.

结论:

  • 酶预处理是提高CNF生产能效的有效策略.
  • 用酶处理的CNF可以成功地纳入PP复合材料,而不会损害机械强度.
  • 这种方法为在先进材料中利用CNF提供了更可持续和更具成本效益的途径.