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首页> 外文期刊>Journal of Applied Polymer Science >Interfacial encapsulation of bio-based benzoxazines in epoxy shells for temperature triggered healing
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Interfacial encapsulation of bio-based benzoxazines in epoxy shells for temperature triggered healing

机译：生物基苯并恶嗪在环氧壳中的界面包封以触发温度

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摘要

Successful application of interfacial engineering for the preparation of cross-linked epoxy microspheres containing thermally polymerizable cardanol-based benzoxazine (Bz-C) monomer in the core is demonstrated. Bz-C is facilely synthesized by Mannich type condensation of cardanol (a by-product of cashew nut industry) and aniline with formaldehyde under solventless conditions. The encapsulation process relies on the preferential reaction of polydimethylsiloxane immiscible epoxy resin and amine-based hardener to form a cross-linked spherical shell at the interface. The microcapsule dimensions and core content could be tailored by modulating the operating parameters, particularly stirring speed and Bz-C: epoxy ratio. Spherical microcapsules with a core content of similar to 37% were obtained when the reaction was carried out at 600 rpm, while maintaining the reaction medium at 70 degrees C with Bz-C: epoxy ratio of 2.3 : 1. The simplicity and versatility of the present methodology are the forte of this technique, which widens the scope for large-scale application of benzoxazines in the field of temperature triggered healing. (C) 2015 Wiley Periodicals, Inc.
机译：证明了界面工程技术在制备核心中包含可热聚合腰果酚基苯并恶嗪（Bz-C）单体的交联环氧微球的成功应用。 Bz-C是在无溶剂条件下通过腰果酚（腰果工业的副产品）和苯胺与甲醛的曼尼希型缩合反应轻松合成的。封装过程依赖于不与聚二甲基硅氧烷混溶的环氧树脂和胺基硬化剂的优先反应，从而在界面处形成交联的球形壳。可以通过调节操作参数，特别是搅拌速度和Bz-C：环氧比来调整微胶囊的尺寸和核心含量。当以600 rpm进行反应时，将反应介质保持在70摄氏度，Bz-C：环氧比为2.3：1时，获得了芯含量接近37％的球形微胶囊。目前的方法学是该技术的强项，它扩大了苯并恶嗪在温度触发的治疗领域中大规模应用的范围。 （C）2015年Wiley Periodicals，Inc.

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