5 results about "Polyacrylamide Hydrogel" patented technology

A polyacrylamide-based aerogel may be an efficient solar vapor generation device. Internal pores of the polyacrylamide-based aerogel may provide capillary forces while elongated surface channels provide a transport force in response to the polyacrylamide-based aerogel contacting liquid. The polyacrylamide-based aerogel may be formed from a photocurable resin doped with reduced graphene oxide particles. The photocurable resin may be printed in layers in a micro continuous liquid interface projection process to form a polyacrylamide-based hydrogel. The polyacrylamide-based hydrogel may be immersed in water to form a swollen hydrogel structure. The swollen hydrogel structure may be frozen. The frozen hydrogel structure may be dried to form a polyacrylamide-based aerogel structure.

The application discloses a method for in-situ preparation of polyacrylamide hydrogel electrolyte at room temperature. The method directly utilizes the inherent reducibility of anode metal zinc, guides ammonium persulfate in a gel precursor solution placed between two zinc sheets or zinc sheets and positive electrode sheets to generate free radicals, so as to initiate a polymerization reaction. Compared with a conventional thermal polymerization and photopolymerization method for preparing hydrogel, the method can be completed in a short time at room temperature, and the prepared hydrogel electrolyte has good combination capacity with electrodes, and the stability of a battery is significantly improved.

This invention provides a capsaicin / sodium alginate-polyacrylamide hydrogel-modified PDMS antifouling coating, its preparation method, and its application, belonging to the field of marine antifouling materials technology. It comprises three components: hydrogel, the natural antifouling agent capsaicin, and polydimethylsiloxane. The synthesis process consists of three steps: first, adding natural capsaicin to the acrylamide hydrogel synthesis process; second, mixing sodium alginate solution with capsaicin to form a precursor solution, which is then added to an initiator for polymerization; and third, slowly adding the polymerized and dried capsaicin-hydrogel powder to a degassed PDMS prepolymer mixture. This invention effectively inhibits the growth of marine fouling organisms with natural capsaicin, utilizes the hydrogel as a toughening reservoir to continuously release an environmentally friendly antifouling agent, and achieves low surface energy antifouling through the polydimethylsiloxane layer, resulting in synergistic benefits. By intervening in the biofouling process from multiple angles, the composite material jointly addresses marine biofouling.

The application discloses a kind of high elastic toughness antibacterial nanocomposite conductive hydrogel material and its preparation method and biomimetic sensing application, belong to the field of functional polymer materials.The application uses melamine foam as porous elastic skeleton, is modified in situ on foam skeleton growth polypyrrole nanoparticles, subsequently polymerizes polydopamine-polyacrylamide hydrogel network in its inside, obtains the multifunctional nanocomposite conductive hydrogel with stable interpenetrating structure.The composite conductive hydrogel of the application has the synergistic effect formed by electronic conduction and ionic conduction, not only has excellent conductivity (up to 12 mS·cm ‑1 ), but also has high elastic toughness and reversible compression performance, has excellent pressure sensing performance under low pressure (0.3 kPa), so as to realize efficient information transmission and encryption application as a pressure sensor.

The application discloses a kind of in vitro directional induction lenticular lens organ by relying on stiffness controllable hydrogel and its construction method and application, technical scheme includes the following steps: (1) pluripotent stem cells are directionally induced and differentiated into primary ectoderm cell group;(2) prepare specific stiffness hydrogel and carry out surface cell adhesion treatment;(3) primary ectoderm cell is planted on the polyacrylamide hydrogel after washing and is induced into neural ectoderm cell group;(4) neural ectoderm cell is directionally differentiated into mature lenticular lens organ.The three-dimensional lenticular lens organ model obtained by the method has the top surface and the bottom surface of the spherical surface lenticular morphology, transparent and has capsule, lenticular lens epithelial cell, lenticular lens fiber cell and other structures, bottom surface is also completely wrapped by lenticular lens capsule.Compared with previous method, the formation of bottom surface complete capsule and spherical surface morphology is realized.