聚乳酸/改性纳托复合膜的制备和属性评估
Weepol Pramualkijja1, Kawee Srikulkit1
1Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
ACS omega
|February 2, 2026
概括
聚氨酸涂层纳托 (PGM-natto) 增强了聚乳酸 (PLA) 复合膜,显著改善了环保包装的机械性能和打印能力. 这项创新为活性包装应用提供了可持续的解决方案.
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:
- 纳托是一种发酵的大豆食品,含有多聚胺酸 (γPGA).
- 自然材料的表面修饰可以赋予新特性.
- 可持续和积极的包装解决方案有很高的需求.
研究的目的:
- 为了合成聚氨酸涂层纳托 (PGM-natto).
- 创建和描述多乳酸 (PLA) /PGM-纳托复合材料.
- 评估这些复合材料在活性和环保包装方面的潜力.
主要方法:
- 使用甲醇和H2SO4.4的PGM-natto在现场合成.
- 使用ATR-FTIR,DSC和TGA进行表征.
- 通过双螺丝挤出和使用造和板材挤出制造薄膜,与PLA结合.
主要成果:
- PGM-natto已经成功合成和表征.
- PLA/PGM-natto复合材料在1重%的PGM-natto下显示出机械性能 (拉伸强度,Young模量,破裂时的%E) 的显著改善.
- 增加的PGM-natto含量超过1 wt%导致机械性能下降,原因是颗粒分布问题.
- 增强的表面和散装水友性提高了可打印性和氧气屏障性能.
结论:
- PGM-natto是PLA的有效增强剂.
- PLA/PGM-natto复合材料提供了增强的机械和屏障性能.
- 这些复合材料显示出积极和可持续的包装应用的前景.
相关概念视频
Physical Properties of Carboxylic Acids
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Carboxylic acids with lower molecular weight exhibit a sharp and unpleasant odor. They also have higher boiling and melting points than analogous compounds, such as aldehydes, ketones, and alcohols.
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Solution Composition During Acid/Base Titrations
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The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
The α0 and α1 values...
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Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
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The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...
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Physical Properties of Carboxylic Acid Derivatives
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Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
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