Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Styrene-acrylic emulsion microcapsule assembly for multiple self-healing of cement concrete cracks and preparation method of styrene-acrylic emulsion microcapsule assembly
The invention relates to a styrene-acrylic emulsion microcapsule assembly for multiple self-healing of cement concrete cracks and a preparation method of the styrene-acrylic emulsion microcapsule assembly. The preparation method comprises the following steps: firstly, coating styrene-acrylic emulsion with polyethylene glycol terephthalate with a relatively high melting point to form microcapsules with relatively small particle sizes; and then the small-particle-size microcapsules and the styrene-acrylic emulsion are coated by the mineral ozocerite/beeswax composite wall material with a lower melting point to form a microcapsule assembly. According to the invention, the styrene-acrylic emulsion microcapsule assembly is added into concrete, when the concrete generates micro-cracks for the first time, the outer capsule wall of the microcapsule assembly is broken under the action of the stress at the tip of the cracks, the styrene-acrylic emulsion is diffused into the concrete cracks, and the cracks are healed by reacting to form a film. The small-particle-size microcapsules flow out along with the styrene-acrylic emulsion when the capsule wall of the outer layer of the assembly is broken and are dispersed in the concrete. And when cracks appear in the concrete again, the small-particle-size microcapsules at the cracks are broken to perform self-healing on the cracks, so that multiple times of self-healing of the concrete cracks is realized.
本发明涉及一种水泥混凝土裂缝多次自愈合用苯丙乳液微胶囊组装体及其制备方法，本发明首先采用熔点较高的聚对苯二甲酸乙二醇酯将苯丙乳液包覆构成粒径较小的微胶囊，然后由熔点较低的矿地蜡/蜂蜡复合壁材将小粒径微胶囊和苯丙乳液包覆组成微胶囊组装体。本发明将苯丙乳液微胶囊组装体加入混凝土中，当混凝土首次产生微裂缝时，在裂缝尖端应力作用下微胶囊组装体外层囊壁发生破裂，苯丙乳液扩散到混凝土裂缝中，反应成膜使裂缝得到愈合。小粒径微胶囊在组装体外层囊壁破裂时伴随苯丙乳液流出，分散在混凝土中。当混凝土内部再度出现裂缝时，裂缝处的小粒径微胶囊发生破裂进而对裂缝进行自愈合，从而实现了混凝土裂缝的多次自愈合。
Styrene-acrylic emulsion microcapsule assembly for multiple self-healing of cement concrete cracks and preparation method of styrene-acrylic emulsion microcapsule assembly
The invention relates to a styrene-acrylic emulsion microcapsule assembly for multiple self-healing of cement concrete cracks and a preparation method of the styrene-acrylic emulsion microcapsule assembly. The preparation method comprises the following steps: firstly, coating styrene-acrylic emulsion with polyethylene glycol terephthalate with a relatively high melting point to form microcapsules with relatively small particle sizes; and then the small-particle-size microcapsules and the styrene-acrylic emulsion are coated by the mineral ozocerite/beeswax composite wall material with a lower melting point to form a microcapsule assembly. According to the invention, the styrene-acrylic emulsion microcapsule assembly is added into concrete, when the concrete generates micro-cracks for the first time, the outer capsule wall of the microcapsule assembly is broken under the action of the stress at the tip of the cracks, the styrene-acrylic emulsion is diffused into the concrete cracks, and the cracks are healed by reacting to form a film. The small-particle-size microcapsules flow out along with the styrene-acrylic emulsion when the capsule wall of the outer layer of the assembly is broken and are dispersed in the concrete. And when cracks appear in the concrete again, the small-particle-size microcapsules at the cracks are broken to perform self-healing on the cracks, so that multiple times of self-healing of the concrete cracks is realized.
本发明涉及一种水泥混凝土裂缝多次自愈合用苯丙乳液微胶囊组装体及其制备方法，本发明首先采用熔点较高的聚对苯二甲酸乙二醇酯将苯丙乳液包覆构成粒径较小的微胶囊，然后由熔点较低的矿地蜡/蜂蜡复合壁材将小粒径微胶囊和苯丙乳液包覆组成微胶囊组装体。本发明将苯丙乳液微胶囊组装体加入混凝土中，当混凝土首次产生微裂缝时，在裂缝尖端应力作用下微胶囊组装体外层囊壁发生破裂，苯丙乳液扩散到混凝土裂缝中，反应成膜使裂缝得到愈合。小粒径微胶囊在组装体外层囊壁破裂时伴随苯丙乳液流出，分散在混凝土中。当混凝土内部再度出现裂缝时，裂缝处的小粒径微胶囊发生破裂进而对裂缝进行自愈合，从而实现了混凝土裂缝的多次自愈合。
Styrene-acrylic emulsion microcapsule assembly for multiple self-healing of cement concrete cracks and preparation method of styrene-acrylic emulsion microcapsule assembly
一种水泥混凝土裂缝多次自愈合用苯丙乳液微胶囊组装体及其制备方法
DU WEI (Autor:in) / LIU BO (Autor:in) / WU JING (Autor:in) / DING QINGJUN (Autor:in) / ZUO DANYING (Autor:in) / WANG LUOXIN (Autor:in) / YANG SHUOSHUO (Autor:in)
01.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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