CAJ | 학술논문

采用“一步法”，以异佛尔酮二异氰酸酯（IPDI）、聚己二酸新戊二醇酯（PNGA）、二羟甲基丙酸（DMPA）为原料，用荧光剂7-氨基-4-三氟甲基香豆素（AFC）对预聚体进行封端，在 IPDI、PNGA、DMPA、AFC 摩尔比为1∶0.45∶0.30∶0.15条件下，制备出一种具有长期贮存稳定性的新型荧光型水性聚氨酯乳液（WPU-AFC）。其结构通过FTIR和UV证实；同时系统地讨论了空间位阻，温度以及AFC含量等因素对乳液荧光性能的影响。结果表明，制备的 WPU-AFC 的荧光强度主要受“结构荧光猝灭”影响而不是“浓度荧光猝灭”影响；随着温度的升高，WPU-AFC和AFC的荧光强度均降低；相同条件下，WPU-AFC的荧光强度与AFC相比均有明显增强；此外，随着AFC分子中苯并吡喃环刚性结构在聚氨酯主链的引入，胶膜的热稳定性明显提高。
채용“일보법”，이이불이동이이청산지（IPDI）、취기이산신무이순지（PNGA）、이간갑기병산（DMPA）위원료，용형광제7-안기-4-삼불갑기향두소（AFC）대예취체진행봉단，재 IPDI、PNGA、DMPA、AFC 마이비위1∶0.45∶0.30∶0.15조건하，제비출일충구유장기저존은정성적신형형광형수성취안지유액（WPU-AFC）。기결구통과FTIR화UV증실；동시계통지토론료공간위조，온도이급AFC함량등인소대유액형광성능적영향。결과표명，제비적 WPU-AFC 적형광강도주요수“결구형광졸멸”영향이불시“농도형광졸멸”영향；수착온도적승고，WPU-AFC화AFC적형광강도균강저；상동조건하，WPU-AFC적형광강도여AFC상비균유명현증강；차외，수착AFC분자중분병필남배강성결구재취안지주련적인입，효막적열은정성명현제고。
The one-pot synthesis of the WPU-AFC fluorescent emulsion,very stable for long-term storage, was realized,based on IPDI,PNGA and DMPA,with blocking by fluorescent agent 7-amino-4-(trifluoromethyl)coumarin (AFC). The mole ratio of IPDI∶PNGA∶DMPA∶AFC is 1∶0.45∶ 0.30∶0.15. Thestructure of WPU-AFC was confirmed by Fourier transform infrared spectroscopy (FTIR) and UV-visible absorption spectroscopy. The influence of stereohindrance,temperature and AFC content was thoroughly investigated. It was found that the fluorescence intensity of AFC was not originated from the so-called “concentrational self-quenching effect”,which could result from the “structural self-quenching effect”. The fluorescence intensity of WPU-AFC decreased with the increasing temperature,and was enhanced compared with that of AFC.In addition,the improved thermal stability of WPU-AFC was attributed to the incorporation of benzopyrone units in the preformed urethane groups.