乙酰乙酸化纤维素纳米纤维的制备及乳化性能研究OA
Preparation and Emulsification Performance of Acetoacetate-functionalized Cellulose Nanofibers
提供了一种多相改性纤维素纳米纤维(CNF)的制备方法,成功制备具有反应活性的乙酰乙酸化纤维素纳米纤维(CNF-AA),展现出良好的乳化性能.通过乙酰乙酸叔丁酯(t-BAA)与CNF发生多相酯交换反应,实现了CNF表面β-二酮官能团的可控修饰.利用傅里叶变换红外光谱仪、透射电子显微镜、X射线衍射分析、流变仪等表征了改性前后CNF的理化性质与结构形貌,并测试了CNF-AA在Pickering乳液中的乳化性能.结果表明,改性过程未破坏CNF的纳米网络与晶体形态,CNF-AA可以稳定水包油(O/W)型Pickering乳液;随着油水比升高(1∶3、1∶2、1∶1),乳液平均粒径从9 μm增加至20 μm,7天内未观察到明显变化,呈现出良好的储存稳定性.
This work presented a facile heterogeneous transesterification method for preparing reactive acetoacetate-functionalized cellulose nanofibers(CNF-AA)with excellent emulsifying performance.CNF were surface-modified with β-diketone groups via reaction with tert-butyl acetoacetate(t-BAA)at 110℃ under heterogeneous conditions.The physicochemical properties and structural morphology of pristine and modified CNF were systematically characterized using Fourier transform infrared spectroscopy(FT-IR),transmission electron microscopy(TEM),X-ray diffraction(XRD),and rheological analysis.The results demonstrated that the modification process preserved both the native nanofibrillar network structure and crystalline integrity of CNF.Owing to its amphiphilic nature,CNF-AA effectively stabilized oil-in-water(O/W)Pickering emulsions.The emulsion droplets increased in size from 9 μm to 20 μm as the oil-to-water ratio increased from 1∶3 to 1∶1.All emulsions exhibited excellent storage stability,with no significant phase separation observed over 7 days.
荣立夺;彭楚泷;王碧佳;毛志平;冯雪凌
东华大学 化学与化工学院 绿色低碳纺织印染技术教育部重点实验室,上海 201620东华大学 化学与化工学院 绿色低碳纺织印染技术教育部重点实验室,上海 201620东华大学 化学与化工学院 绿色低碳纺织印染技术教育部重点实验室,上海 201620东华大学 化学与化工学院 绿色低碳纺织印染技术教育部重点实验室,上海 201620东华大学 化学与化工学院 绿色低碳纺织印染技术教育部重点实验室,上海 201620
通用工业技术
纤维素纳米纤维乙酰乙酸化改性Pickering乳液稳定性流变性
cellulose nanofiberacetoacetylation modificationPickering emulsionstabilityrheology
《纤维素科学与技术》 2026 (1)
1-7,7
中央高校基本科研业务费专项资金资助(2232024D-14)
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