适用性更广,2所大学公布UV LED研发动态

UVLED风向 · 2024-06-20

行家说UV 导读:

一种辣椒红素/碘鎓盐系光引发体系用于UV-LED固化的方法

南京林业大学公开了一种将辣椒红素与碘鎓盐匹配用于UV‑LED光聚合引发体系的方法,具体是先使用超声辅助低共熔溶剂从辣椒粉中提取辣椒红素,再将辣椒红素和碘鎓盐以及N‑甲基二乙醇胺或二巯基噻二唑等按质量比混合后制备成二元或三元光引发体系,再将其加入到丙烯酸酯类光聚合单体中形成光聚合体系,最后在空气中或限制氧气的条件下,用UV-LED照射涂敷在基体上的光聚合体系涂层至其固化。

该发明所制备的光引发体系减少了传统有机化合物的使用,拓宽了光引发剂对长波长光谱的灵敏度,匹配了UV-LED固化丙烯酸酯类单体的需求,减少了汞灯这种污染环境设备的使用,具有制备工艺简便,反应条件温和,对人体细胞无毒无害,可以有效克服氧阻聚,且具有可以被光漂白、使涂层无色透明的优点。

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天津科技大学本发明涉及一种LED-UV固化型可剥离保护胶,原料组分及其质量分数为:丙烯酸树脂40~60%、丙烯酸单体25~45%、功能性单体4~8%、光引发剂2~8%、助剂6~15%。该发明还涉及一种LED-UV固化型可剥离保护胶的制备方法,将合成的丙烯酸树脂直接计量输送至密封罐,并向密封罐中加入丙烯酸单体及功能性单体,均匀搅拌至混合充分,随后加入光引发剂与助剂,继续搅拌,直至保护胶质地均匀,光引发剂完全溶解,得到LED-UV固化型可剥离保护胶。

这一发明可以很大程度上提高保护胶的生产效率,其所采用的两种多元醇具有良好的生物相容性,环境友好,制备出的丙烯酸树脂符合低碳环保要求,保护胶在丝网印刷涂覆保护胶时,可以有效改善保护胶在双疏材料表面的成膜效果,适用性更广。

来源:综合整理

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