聚乙烯-协同-乙酸) 溶液电的特性和挑战
Laura Unverzagt1, Oleksandr Dolynchuk2, Olaf Lettau3
1Institute of Pharmacy, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 3, Halle 06120, Germany.
ACS omega
|April 29, 2024
概括
聚乙烯-协同乙酸 (PEVA) 的电是具有挑战性的,但这项研究确定了最佳的加工条件. 实现了具有特定溶液粘度的无珠PEVA纤维 (∼10微米),使未来的复合纤维应用成为可能.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
背景情况:
- 聚乙烯-联合乙酸 (PEVA) 是一种多功能共聚物,以弹性,耐用性和生物相容性而闻名.
- 传统的加工方法如融挤出和溶剂造已经建立,但电PEVA仍然很困难.
- 了解PEVA的加工局限性对于开发先进材料和应用至关重要.
研究的目的:
- 为了确定各种聚乙烯-协同乙酸 (PEVA) 材料电的可旋性窗口.
- 研究乙乙烯酸含量和分子量对PEVA电旋行为的影响.
- 为了确定生产均PEVA纤维的最佳溶液成分和加工参数.
主要方法:
- 使用了10种不同的PEVA材料,含有不同的乙乙烯酸含量 (12-40 wt%) 和分子重量 (60-130 kDa).
- 计算汉森溶解度参数,以预测合适的溶剂和经过实验验证的候选物.
- 进行了系统的电实验,改变了溶液度,粘度和加工参数.
- 开发了一个包含产品特征和可复制性的可旋性评分.
主要成果:
- 确定了导致喷嘴物质沉积的关键因素,并特征了多喷气旋转行为.
- 确定PEVA溶液的表面粘度在920-3500mPa·s之间产生无珠纤维.
- 成功生产了平均直径约为10微米的PEVA纤维.
- 根据开发的得分,建立了基于PEVA的合理化可旋转性评估.
结论:
- 成功建立了用于电旋PEVA的定义可旋转窗口.
- 这些发现为克服PEVA纤维通过电生产的挑战提供了关键的见解.
- 实现的纤维尺寸 (∼10μm) 开辟了先进应用的可能性,包括复合纤维的悬浮电.
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