4results about How to "Suitable mechanical strength" patented technology

The present invention provides a material belonging to the field of material science and technology, and in particular relates to an injectable hydrogel material, a preparation method thereof, and an application as a vitreous substitute, wherein the injectable hydrogel is prepared from a cyanoalkyl hydrazide polymer and a polymer containing an aldehyde functional group. The injectable hydrogel material provided by the present invention is a C=C double-bond cross-linked hydrogel material formed by a Knoevenagel condensation reaction between cyanoacetylhydrazide and an aldehyde group. The preparation conditions are mild, the gelation time is moderate, the material has an injectable property, and the material can be long-term stable after injection, maintain stable intraocular pressure, and support the retina. At the same time, the material can provide advantages such as a clear light path, and can be applied in the medical field of vitreous substitutes.

This invention belongs to the field of contact lens technology, and provides a moisturizing protein-based contact lens and its preparation method. The preparation method includes the following steps: mixing a silk fibroin solution and a hyaluronic acid-binding protein solution to obtain a protein mixture solution; mixing a hydrophilic modification component, an oxygen-permeable modification component, and water to obtain a composite modifier; mixing the protein mixture solution, the composite modifier, and a crosslinking agent to obtain a pre-crosslinked mixture; molding the pre-crosslinked mixture and performing gradient crosslinking, followed by sequential soaking in buffer solution, rinsing, and sterilization to obtain the moisturizing protein-based contact lens. The contact lens of this invention uses protein as the main component, does not rely on silicon-based substances or harmful crosslinking agents, and possesses high biocompatibility, high oxygen permeability, suitable mechanical properties, and controllable degradation.

This invention relates to a nano-metakaolin-modified hydraulic lime-based composite material and its preparation and application. The composite material comprises natural hydraulic lime and nano-metakaolin dispersed in the natural hydraulic lime, wherein the mass ratio of natural hydraulic lime to nano-metakaolin is (60-90):(10-40). The nano-metakaolin-modified hydraulic lime-based composite material of this invention exhibits controllable dispersibility and fluidity in the slurry after mixing with water. It also demonstrates good rock compatibility, low soluble salt content, controllable curing time, suitable post-curing strength, low permeability, and low shrinkage and expansion rate. The presence of a repair agent can specifically enhance the additional protective performance of the reinforcement material. It possesses high applicability, safety, and durability for the protection of stone cultural relics, without causing derivative damage.

The utility model relates to a self-adhesive sponge for nasal septum perforation repair, which is used for fixing cartilage at a nasal septum perforation position and comprises a sponge support body, the sponge support body comprises a sponge support layer, an adhesive layer and an anti-sticking layer which are sequentially attached, the adhesive layer is arranged on one side of the sponge support layer attached to a wound surface, and the anti-sticking layer is arranged on the other side of the sponge support layer attached to the wound surface. And the surface of the adhesion layer is covered with an anti-adhesion layer. Compared with the prior art, the self-adhesive sponge disclosed by the utility model has good mechanical property, good adhesive capacity between the sponge bracket main body and a wound surface, can be firmly attached to a cartilage of a perforated nasal septum and promote mucous membrane healing, and also has good biological safety, degradability and intraoperative operability; the nasal septum perforation repair effect is improved, the nasal septum perforation rate is reduced, and the life quality of a patient is improved.