Study On The Structure And Ramification Preparation Of Hydrogel Polymerized By Pickering Emulsion

Ferrohydrogels have huge potential applications in biological field including controllability and actuation reaction property, as they make ready reaction, such as deformation and swelling/deswelling, to external magnetic field. However, as(1) magnetic particles are difficult to distribute uniformly in hydrogel system; and(2) hard to bond tightly magnetic particles with hydrogel network; and(3) ferrohydrogels have poor mechanical properties; as well as(4) complex preparation technology and so on, the application of hydrogel as structural material in biological field are greatly limited.Pickering emulsion hydrogel(PE gel) is prominent to solve the above mentioned problem as Pickering emulsion acts as dispersion medium while magnetic micelles play a role of multifunctional cross linker after their gelatinization. Nevertheless, we still don't do further study on the precise structure of this system. In this paper, we will further discuss this crosslinking mechanism, potential chemical and physical properties and applications by means of characterizing samples prepared by gradual decomposing the PE gel preparation and made by using PE gel end product as base material. The main content of the research and the results are as follows:(1) We made a research on the crosslinking mechanism of TPM in hydrogel network in an independent way. SDS as dispersant take the place of ferronanos, TPM still acted as multifunctional cross-linker, Am as monomer and distilled water as solution. Then, we prepared TE gel by a “one pot” way and discussed the difference of structure between PE gel and TE gel by making an analysis on SEM graph and making tests on mechanics and swelling of them.(2) We also made a research on PE gel at high TPM concentration and high water content. It is false that our group denied the mechanic performance of PE gel at low Am content, as the mechanics of hydrogel is severe affected by its water content. In this paper we better the mechanics of PE gel at low Am concentration by increasing TPM concentration and polymeric temperature. As the ferronanos content in hydrogel is limited by TPM content, increasing TPM content may improve the magnetics of hydrogel.(3) Modify PE gel by IPN way to study its potential application. PE gel has great strength, however, its recover rates after compressive strain is slow as its structure is constructed by flexible chain. In this paper, we introduced AA-Na to PE gel network by swelling. Not only increase its recover ability after compressive strain greatly and strength a little, but also its swelling rate.