[1]牛晓伟,徐辉波,路新成,等.尿素/三聚氰胺/甲醛原位聚合制备微胶囊化电子墨水[J].东南大学学报(自然科学版),2009,39(3):602-605.[doi:10.3969/j.issn.1001-0505.2009.03.034]
 Niu Xiaowei,Xu Huibo,Lu Xincheng,et al.Preparation of microcapsules for E-ink via in situ polymerization of urea, melamine and formaldehyde[J].Journal of Southeast University (Natural Science Edition),2009,39(3):602-605.[doi:10.3969/j.issn.1001-0505.2009.03.034]
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尿素/三聚氰胺/甲醛原位聚合制备微胶囊化电子墨水()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第3期
页码:
602-605
栏目:
化学化工
出版日期:
2009-05-20

文章信息/Info

Title:
Preparation of microcapsules for E-ink via in situ polymerization of urea, melamine and formaldehyde
作者:
牛晓伟1 徐辉波2 路新成1 韩家佳1 孙岳明1
1 东南大学化学化工学院, 南京 211189; 2 江苏省安全生产科学研究院, 南京 210042
Author(s):
Niu Xiaowei1 Xu Huibo2 Lu Xincheng1 Han Jiajia1 Sun Yueming1
1 School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
2 Jiangsu Province Academy of Safety Science and Technology, Nanjing 210042, China
关键词:
微胶囊 电子墨水 三聚氰胺 脲醛树脂 原位聚合
Keywords:
microcapsule electrophoretic ink melamine urea-formaldehyde resin in situ polymerization
分类号:
TQ323
DOI:
10.3969/j.issn.1001-0505.2009.03.034
摘要:
采用原位聚合法制备了以三聚氰胺改性脲醛树脂为壁材,聚甲基丙烯酸甲酯(PMMA)修饰二氧化钛为显示颗粒,四氯乙烯为分散介质的电子墨水微胶囊,并对制备工艺进行优化.采用光学显微镜和扫描电子显微镜研究了反应体系pH值、不同表面活性剂和固化剂等对微胶囊的成囊效果、表面形貌及壁材强度的影响.结果表明:采用质量分数为1%甘油做表面活性剂,可适当调节油/水界面张力,抑制微胶囊化过程中的黏结团聚; 通过调节体系pH值,控制缩聚反应速率,可有效抑制水相中絮状树脂的产生,得到表面光滑的微胶囊; 采用氯化铵作固化剂对微胶囊进行固化,可有效提高微胶囊的机械强度,得到在自然干燥后不破裂的微胶囊.
Abstract:
Microcapsules of E-ink was prepared through in situ polymerization,in which titanium dioxide modified by PMMA(polycmethye methacry late)was introduced as displaying particles dispersed in carbon dichloride, and urea-formaldehyde resin modified with melamine as wall material. Also, the polymerization process was studied to optimize the reaction conditions. Optical microscope and electronic microscope were used to observe the effects of various process conditions, including the variety of system pH, surfactant and curing agents, on the encapsulation performance, microcapsule surface and wall strength. The results show that glycerol, as surfactant, with a concentration of 1% can alternate the interfacial tension between water and oil to some extent; thusly, the conglomeration problem can be inhibited during the microencapsulation process. Meanwhile, by controlling the reaction rate of condensation polymerization and adjusting the pH of the system, the floccules can be restrained effectively, and microcapsules with smooth surfaces are obtained. Finally, the addition of NH4Cl may result in properly strengthened microcapsules to resist the collapse during nature drying.

参考文献/References:

[1] Wang J P,Zhao X P,Guo H L,et al.Preparation of microcapsules containing two-phase core materials [J].Langmuir,2004,20(25):10845-10850.
[2] Ehrfeld W.Electrochemistry and microsystems [J]. Electrochim Acta,2003,48(20/21/22):2857-2868.
[3] Murau P,Singer B.The understanding and elimination of some suspension instabilities in an electrophoretic display [J]. J Appl Phys,1978,49(9):4820-4829.
[4] Comiskey B,Albert J D,Yoshizawa H,et al.An elecetrophoretic ink for all-printed reflective electronic displays [J]. Nature,1998,394(6690):253-255.
[5] 裴广玲,王亭杰,杨毅,等.电泳显示微胶囊的制备和性能[J].物理化学学报,2005,21(4):430-434.
  Pei Guangling,Wang Tingjie,Yang Yi,et al.Preparation and properties of microcapsules for electrophoretic display [J]. Acta Phys-Chim Sin,2005,21(4):430-434.(in Chinese)
[6] 王允韬,王建平,郭慧林,等.脲甲醛树脂基白色电子墨水材料的制备[J].功能材料,2004,35(1):105-107.
  Wang Yuntao,Wang Jianping,Guo Huilin,et al.Preparation of electrophoretic ink using urea-formaldehyde oligomer [J]. J Funct Mater,2004,35(1):105-107.(in Chinese)
[7] 赵晓鹏,王建平.蓝色电子墨水微胶囊的制备方法:中国,CN02139592.6[P].2004-06-23.
[8] 王建平,郑晴,郭慧林,等.预聚体特性黏数与电子墨水微胶囊性能的关系[J].材料研究学报,2005,19(2):147-152.
  Wang Jianping,Zheng Qing,Guo Huilin,et al.Relation between the limiting viscosity number of urea-formaldehyde prepolymer and the blue electronic ink microcapsules [J]. China J Mater Res,2005,19(2):147-152.(in Chinese)
[9] No B Y,Kim M G.Syntheses and properties of low-level melamine-modified urea-melamine-formaldehyde resins [J]. J Appl Polym Sci,2004,93(6):2259-2569.
[10] Kim K S,Lee J Y,Park B J,et al.Synthesis and characteristics of microcapsules containing electrophoretic particle suspensions [J].Colloid Polym Sci,2006,284(7):813-816.
[11] 王勇,张铭,刘洁,等.合成脲醛树脂胶粘剂的两种工艺的比较[J].中国胶粘剂,2006,15(4):41-43.
  Wang Yong,Zhang Ming,Liu Jie,et al.The comparison of two processes of the synthesis of urea-formaldehyde(UF)resins [J].China Adhesives,2006,15(4):41-43.(in Chinese)
[12] 林昌镇,顾继友.三聚氰胺改性脲醛树脂胶粘剂研究进展[J].粘接,2001,22(5):29-32.
  Lin Changzhen,Gu Jiyou.A review of melamine modified urea-formaldehyde resin adhesive [J].Adhesion in China,22(5):29-32.(in Chinese)
[13] Jahromi S.Storage stability of melamine-formaldehyde resin solutions,1:the mechanism of instablility [J]. Macromol Chem Phys,1999,200(10):2230-2239.
[14] 李建章,李文军,周文瑞,等.脲醛树脂固化机理及其应用[J].北京林业大学学报,2007,29(4):90-94.
  Li Jianzhang,Li Wenjun,Zhou Wenrui,et al.Curing mechanism of urea-formaldehyde resin and its application [J].J Beijing Forestry Univ,2007,29(4):90-94.(in Chinese)

备注/Memo

备注/Memo:
作者简介: 牛晓伟(1981—),男,博士生; 孙岳明(联系人),男,博士,教授,博士生导师,sun@seu.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2007CB936300).
引文格式: 牛晓伟,徐辉波,路新成,等.尿素/三聚氰胺/甲醛原位聚合制备微胶囊化电子墨水[J].东南大学学报:自然科学版,2009,39(3):602-605. [doi:10.3969/j.issn.1001-0505.2009.03.034]
更新日期/Last Update: 2009-05-20