基于液体弹珠原位制备载水胶囊及其性能

Water-Bearing Capsule in situ Prepared from Liquid Marble and Its Performance

首先以疏水性二氧化硅微粒为稳定剂,通过包覆水滴制备了液体弹珠;然后在其表面滴涂α-氰基丙烯酸乙酯,通过湿气固化制得聚合物涂层封装的液体弹珠;最后在弹珠表面进一步涂覆环氧大豆油丙烯酸酯涂层,通过紫外光固化制得载水胶囊。采用数码照片、超景深显微镜、扫描电子显微镜对液体弹珠及载水胶囊的形貌进行了表征;采用实时傅里叶红外光谱研究了光固化涂层的双键转化率,探讨了涂层的硬度、耐水性等基本性质;并研究了载水胶囊的力学强度及保水性能。结果表明:相较于原始液体弹珠,所制备的载水胶囊表面光滑且致密;由聚α-氰基丙烯酸乙酯涂层和环氧大豆油丙烯酸酯光固化涂层组成的壁材赋予了载水胶囊良好的水汽阻隔性能和力学性能。

Liquid marble was first prepared by encapsulation of water droplet using hydrophobic silicon dioxide particles as the stabilizer of liquid-gas interface.Then the as-prepared liquid marble was packaged using a polymer coating by moisture curing of ethylα-cyanoacrylate on its surface.A coating of acrylated epoxidized soybean oil was further prepared on the marble surface by photocuring method to finally form a water-bearing capsule.The double-bond conversion of the UV-cured coating was investigated by the real-time FT-IR.The basic properties such as hardness and water resistance were studied.The morphologies of the liquid marble and water-bearing capsule were characterized by digital photography,optical microscopy,and scanning electron microscopy.The mechanical performance and water retention capacity of the water-bearing capsule were also studied.The results showed that the surface of as-prepared water-bearing capsule was smooth and compact,compared with that of original liquid marble.The poly(ethylα-cyanoacrylate)coating and UV-cured coating of acrylated epoxidized soybean oil endowed the water-bearing capsule with both excellent water vapor barrier property and mechanical performance,making it a great potential to be applied in cosmetics,pharmacy and cigarette.