Role of ammonium chloride in preparing poly(urea-formaldehyde) microcapsules using one-step method

被引：28

作者：

Fan, Chuanjie ^{[1
]}

Tang, Juntao ^{[1
]}

Zhou, Xiaodong ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Dept Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2013年 / 129卷 / 05期

关键词：

colloids; morphology; synthesis and processing; UREA-FORMALDEHYDE RESINS; PHASE-SEPARATION METHOD; IN-SITU POLYMERIZATION; EPOXY-RESINS; MICROENCAPSULATION; MECHANISM; DISPLAYS; RELEASE; FOOD;

D O I：

10.1002/app.39008

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This study investigates the role of ammonium chloride in the process of preparing poly (urea-formaldehyde) (PUF) microcapsules using the one-step method. Scanning electron microscopy (SEM) and optical microscopy (OM) were used to observe the morphology of the microcapsule. The results showed that the addition of ammonium chloride in the one-step process of preparing PUF resin microcapsule decreases the pH of the system. The decrease in pH of the system is due to the reaction between ammonium chloride and formaldehyde, and more so due to the reaction between ammonium chloride and hydroxymethyl urea. In addition to reducing the pH of the system, the reaction between ammonium chloride and urea-formaldehyde resin can generate surface active substances, which drives the formed UF nanoparticles to enrich the surface of the dispersed phase. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

引用

页码：2848 / 2856

页数：9

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