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对于数字光处理的乙烯和烯酸光交联型氨酸凝油墨之间的比较研究
Therese Steudter1,2, Tobias Lam3, Hamidreza Pirmahboub3
1INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany.
Macromolecular bioscience
|December 31, 2024
概括
硫乙烯氨酸 (HA) 水凝提供优越的前体稳定性和比甲基烯酸HA更快的光交联. 这使得高分辨率生物打印能够改善对网络形成的控制.
科学领域:
- 生物材料科学 生物材料科学
- 聚合物化学 聚合物化学
- 生物打印技术的技术
背景情况:
- 光交联式水凝对于基于光的制造和生物打印至关重要.
- 提烯反应被提出为水凝形成的甲基酸盐化学品的优质替代品.
- 氨酸 (HA) 是用于组织工程和再生医学应用的关键生物材料.
研究的目的:
- 为了从数量上比较乙烯和甲酸交联的氨酸 (HA) 水凝.
- 为了评估前体稳定性,光交联控制和生物打印应用的打印分辨率.
- 评估乙烯功能化对基于HA的油墨的好处.
主要方法:
- 与norbornene,乙烯或甲基烯酸基团一起功能化的HA的合成.
- 功能化HA前体的储存稳定性测试.
- 摄影神学分析光交联动力学和网络形成.
- 数字光处理 (DLP) 生物打印以确定特征分辨率.
主要成果:
- 乙烯HA前体表现出比甲化HA的3.8倍更大的储存稳定性.
- 用乙烯HA,光交叉连接速度高达4.7倍,提供更好的时间控制.
- 使用4% w/v HA 水凝进行DLP打印,在2秒内实现了100μm的特征分辨率.
- 这代表了使用基于HA的乙烯水凝进行DLP打印所报告的最小特征尺寸.
结论:
- 乙烯化学在基于HA的水凝生物打印中比甲基酸盐化学具有显著的优势.
- 增强的前体稳定性和快速,可控的光交联是关键的好处.
- 这些发现支持了用于先进生物打印的乙烯功能化所需的合成努力.
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01:28IR and UV–Vis Spectroscopy of Carboxylic Acids
In IR spectroscopy of carboxylic acids, the C=O bond shows a characteristic band between 1710 and 1760 cm⁻¹, and the O–H bond exhibits a broad band between 2500 and 3300 cm⁻¹.
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency, 1710 cm−1. The C=O bond of the...
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency, 1710 cm−1. The C=O bond of the...
01:26Spectroscopy of Carboxylic Acid Derivatives
Infrared spectroscopy is primarily used to determine the types of bonds and functional groups. In carboxylic acid derivatives, a typical carbonyl bond absorption is observed around 1650–1850 cm−1. For esters, the absorption is recorded at around 1740 cm−1, while acid halides show the absorption at about 1800 cm−1. Another acid derivative, the acid anhydrides, exhibit two carbonyl absorption around 1760 cm−1 and 1820 cm−1, arising from the symmetrical and unsymmetrical carbonyl vibration.
In the...
In the...
01:19Physical Properties of Carboxylic Acid Derivatives
Intermolecular forces dictate several physical properties such as boiling points, melting points, solubilities, and so forth. They are classified into four types: ionic forces, hydrogen bonds, dipole–dipole forces, and dispersion forces. Ionic forces are the strongest, while dispersion forces are the weakest.
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...
01:31Physical Properties of Carboxylic Acids
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.