采用原位聚合法制备了以聚脲甲醛(PUF)为壁材,亚麻油(LO)和1-丁基-3-甲基咪唑六氟磷酸盐([BMIM]PF6)为芯材的双芯微胶囊,通过光学显微镜观察微胶囊的形成过程,研究了乳化剂种类、乳化剂含量、搅拌速度、芯壁比对微胶囊形貌和包覆率的影响,并确定了合成微胶囊的最佳工艺参数。结果表明:以聚乙烯醇为乳化剂,其用量为芯材含量的5%(质量分数),搅拌速度为600r/min,芯壁比为1∶1时制备的微胶囊外貌呈球型,表面无缺陷和孔洞,粒径分布均匀,平均粒径为20.29μm,壁厚为950nm且包覆率达到75.61%。
Dual-core microcapsules with polyurea formaldehyde (PUF) as the wall material,and linseed oil (LO) and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) as the core materials were prepared by in-situ polymerization method.The formation process of the microcapsules was observed by optical microscopy.The effects of emulsifier type,emulsifier content,stirring speed,and core-to-wall ratio on the microcapsule morphology and encapsulation rate were investigated,and the optimal process parameters for synthesizing microcapsules were determined.The results showed that when polyvinyl alcohol was used as the emulsifier,the dosage was 5wt.% of the core content,the stirring speed was 600rpm,and the core-to-wall ratio was 1∶1,the prepared dual-core microcapsules were spherical in appearance,with no defects and pores on the surface,uniform particle size distribution,average particle size of 20.29μm,wall thickness of 950 nm and coverage rate of 75.61%.
[1] 钟晴,龙慧,覃晓明,等.聚甲基丙烯酸甲酯-氧化锌包覆正十四醇多功能相变微胶囊的制备及表征[J].化工新型材料,2020,48(12):102-107.
[2] 王鑫,方建华,吴江,等.改性SiO2杂化层相变微胶囊的制备与表征[J].化工进展,2020,39(4):1431-1438.
[3] 郭靖,高翔,刘兰轩,等.自修复微胶囊的制备及其影响因素研究[J].上海涂料,2019,57(3):1-6.
[4] 童晓梅,郝芹芹,闫子英,等.含环氧树脂微胶囊自修复涂层的制备及其性能[J].表面技术,2017,46(12):84-90.
[5] Li X,Liu R,Li S,et al.Properties and mechanism of self-healing cement paste containing microcapsule under different curing conditions[J].Construction and Building Materials,2022,357:129410.
[6] 张晓辰,刘猛,范金福,等.氯化钾对相变石蜡微胶囊制备的影响研究[J].化工新型材料,2019,47(11):145-148.
[7] Li H Y,Ma Y J,Li Z K,et al.Synthesis of novel multilayer composite microcapsules and their application in self-lubricating polymer composites[J].Composites Science and Techno-logy,2018,164:120-128.
[8] 程晨,杜仕国,鲁彦玲,等.乙基纤维素微胶囊红磷的制备及性能表征[J].化工进展,2019,38(4):1846-1852.
[9] 钱森和,李方凯,屠西猛,等.牡丹籽多肽微胶囊的制备、表征及缓释性能[J].中国油脂,2022,47(10):33-38.
[10] 龚圣,陈燕,韩文强,等.茶树油/脲醛树脂缓释微胶囊的制备[J].化工进展,2017,36(5):1862-1867.
[11] Tzavidi S,Zotiadis C,Porfyris A,et al.Epoxy loaded poly (urea-formaldehyde) microcapsules via in situ polymerization designated for self-healing coatings[J].Journal of Applied Polymer Science,2020,137(43):49323.
[12] 李岚,袁莉,梁国正,等.工艺参数对聚脲甲醛包覆环氧树脂微胶囊物性的影响[J].复合材料学报,2006(5):51-57.
[13] de Carvalho A C M,Ferreira E P D C,Bomio M,et al.Influence of synthesis parameters on properties and characteristics of poly (urea-formaldehyde) microcapsules for self-healing applications[J].Journal of Microencapsulation,2019,36(4):410-419.
[14] 艾秋实,张秋禹,邢瑞英,等.一步法制备聚脲甲醛包覆反应性乙烯基硅油微胶囊[J].中国胶粘剂,2010,19(4):13-17.
[15] Mohammadloo H E,Mirabedini S M,Pezeshk-Fallah H.Microencapsulation of quinoline and cerium based inhibitors for smart coating application:anti-corrosion,morphology and adhesion study[J].Progress in Organic Coatings,2019,137:105339-105339.
[16] Farzi G,Davoodi A,Ahmadi A,et al.Encapsulation of cerium nitrate within poly(urea-formaldehyde) microcapsules for the development of self-healing epoxy-based coating[J].ACS Omega,2021,6(46):31147-31153.
[17] Gao P P,Zhou Z H,Yang B,et al.Structural regulation of poly(urea-formaldehyde) microcapsules containing lube base oil and their thermal properties[J].Progress in Organic Coa-tings,2021,150:105990.
[18] 董邯海,程勇,程庆利,等.六亚甲基二异氰酸酯微胶囊的制备及其在自修复涂料中的应用[J].表面技术,2023,52(4):272-284.
[19] 雷瑞,马养民,杨秀芳.醇酸树脂微胶囊的制备及环氧涂层自修复性能[J].化工进展,2020,39(7):2782-2787.
[20] 王培.表面改性聚脲醛环氧树脂微胶囊对涂层自修复性能的影响规律研究[D].青岛:中国石油大学(华东),2016.
[21] Jiang Y H,Yao J L,Zhu C F,et al.Improving the dispersibility of poly(urea-formaldehyde) microcapsules for self-healing coatings using preparation process[J].Journal of Renewable Materials,2022,10(1):135-148.
[22] Wang R G,Li H Y,Liu W B,et al.Surface modification of poly(urea-formaldehyde) microcapsules and the effect on the epoxy composites performance[J].Journal of Macromolecular Science:Part A,2010,47(10):991-995.
[23] 李重阳,王高琦,韩庆国,等.纳米Fe3O4颗粒对离子液体润滑减摩及电控增摩性能的影响[J].表面技术,2023,52(2):233-244;281.
[24] Ghorbani M,Ebrahimnezhad-Khaljiri H,Eslami-Farsani R,et al.The synergic effect of microcapsules and titanium nanoparticles on the self-healing and self-lubricating epoxy coatings:a dual smart application[J].Surfaces and Interfaces,2021,23:100998.
[25] 郭靖.原位聚合脲醛树脂微胶囊制备技术研究[D].北京:机械科学研究总院,2019.
[26] 程鑫.微胶囊/环氧树脂复合材料的制备及摩擦性能的研究[D].镇江:江苏科技大学,2021.
