通过界面能驱使微液滴界面上的表面活性剂分子形成双分子层,构建了基于液滴界面黏附的微液滴组装结构,并以此结构为模板制得基于水凝胶微颗粒组装聚集的水凝胶功能材料。以含N-异丙基丙烯酰胺和海藻酸钠的水溶液与含4% T154的大豆油分别作为分散相和连续相,采用微流控技术可控制备了尺寸均一的微液滴作为基本单元,系统研究了液滴组成和物性对界面黏附行为的影响规律。结果表明,N-异丙基丙烯酰胺浓度为0.1 mol/L和海藻酸钠质量分数为0.7%时,液滴界面黏附比可达到49.53%,实现了液滴界面的稳定黏附。成功构建了基于不同数目微液滴的组装结构,并以其为模板经紫外光照聚合制得水凝胶微颗粒组装功能材料。

By utilizing the interfacial energy,the surfactant molecules on the interface of the microdroplets is driven to form a bilayer to construct microdroplets assembling structures base on droplets interfacial adhesion.Such assembled microdroplet structures are used as templates to create hydrogel functional materials based on assembled hydrogel microparticles.The aqueous solution containing N-isopropylacrylamide and sodium alginate is taken as the dispersed phase,and soybean oil containing 4wt% of T154 is taken as continuous phase,microdroplets with uniform size are controllably generated by means of microfluidics technology.The microdroplets is used as the basic unit to study the effect of composition and physical property of microdroplets on the interfacial adhesion behavior.It is shown that the interfacial adhesion ratio of droplets can achieve 49.53%,realizing stable interfacial adhesion when the content of N-isopropylacrylamide is 0.1 mol·L^-1 and the mass fraction of sodium alginate is 0.7% in the microdroplets.Assembled microdroplet structures based on different numbers of microdroplets are successfully fabricated,and then used as templates to create functional materials of assembled hydrogel microparticles via UV-irradiated polymerization.

黄庆(1997-),女,硕士生,研究方向为微流控技术与功能材料,2754763824@qq.com。