Abstract Melamine formaldehyde (MF) is a versatile and widely used chemical cross-linking agent in microcapsule shells for the encapsulation of oil phases in an aqueous continuum. However, it has not been possible to form MF microcapsules with water soluble actives, to achieve sustained/no release in aqueous environment. Herein, 5 types of MF based microcapsules were designed and synthesised with 4 polymers, including neutral and polar poly(acrylamide-acrylic acid), anionically charged biocompatible shellac and ion exchange resin polystyrene sulfonate as well as a superhydrophobic polymer precursor octadecyltrichlorosilane, via an in situ polymerisation method. Potassium chloride and allura red (dye, Mw = 496.42 g·mol−1) were used as models of inorganic and organic water soluble actives with low molar mass, respectively, to study their size distributions, encapsulation efficiencies, payloads, morphologies and release rates in aqueous environment. The release rates ranged from complete release within 15 min to no release up to 1 month in aqueous environment.

中文翻译：

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三聚氰胺甲醛基微胶囊中水溶性无机和有机活性物质的有效封装，以控制释放到水环境中

摘要 三聚氰胺甲醛 (MF) 是一种通用且广泛使用的化学交联剂，用于微胶囊壳中的油相包封。然而，不可能形成具有水溶性活性物的MF微胶囊，以在水性环境中实现持续/无释放。在此，我们设计并合成了 5 种 MF 基微胶囊，其中包括中性和极性聚（丙烯酰胺-丙烯酸）、带阴离子电荷的生物相容性虫胶和离子交换树脂聚苯乙烯磺酸盐以及超疏水聚合物前体十八烷基三氯硅烷，其中包括 4 种聚合物。原位聚合法。氯化钾和诱惑红（染料，Mw = 496.42 g·mol-1）分别用作低摩尔质量的无机和有机水溶性活性物质的模型，研究它们在水性环境中的尺寸分布、封装效率、有效载荷、形态和释放率。释放速率范围从 15 分钟内完全释放到在水性环境中长达 1 个月不释放。