53results about How to "Degradation time controllable" patented technology

The invention discloses a biodegradation time controlled plastic film and a preparation method thereof. The biodegradation time controlled plastic film can be prepared through a blow molding method or a tape casting method; and the biodegradation time controlled plastic film mainly comprises a degradative resin and a time controlled soft antibacterial agent. The soft antibacterial agent is a long-chain quaternary ammonium compound consisting of three parts, namely long-chain alkyl, an easily-adjusted spacer and a terminal polar group (quaternary ammonium salt), and the inactivation half-life thereof at the temperature of 60 DEG C is at least more than 3h.

The invention relates to a chemical product, in particular to a method for synthesizing an adsorbent, that is, a method for synthesizing starch microspheres. The invention synthesizes starch microspheres in a dispersant at a certain temperature and within a certain reaction time under the action of a high-efficiency catalyst and a surfactant. The whole reaction can be completed within 4 hours, and the ball forming time is within 1 hour. The reaction time is short, the monomer price is low, and the cost of the obtained microspheres is greatly reduced compared with the existing products, which makes it possible to develop starch microspheres in a wider field. . In addition to being used as a drug carrier, the obtained microspheres can also be used as adsorbents for various substances such as essences, as well as diet foods, paper strengthening agents, sewage treatment agents, and the like.

The invention belongs to the field of medical hemostatic materials, in particular to a hemostatic material and a preparation method thereof. The hemostatic material includes the following raw materials in parts by weight: carboxymethyl chitosan 0.1-1.5, polyvinyl alcohol (PVA) 0.5-2, compound toughening material (hereinafter also referred to as: plasticizing system) 0.2-5 , 0.5-1.5 parts of ionic cross-linking agent, and the hemostatic material may also include 0.5-3 parts by weight of a broad-spectrum hemostatic antibacterial agent. The product of the invention has good mechanical elasticity, rapid hemostasis, complete degradation, non-toxicity, and strong antibacterial property; it is suitable for wound hemostasis, preferably for body cavity hemostasis, especially for nasal cavity hemostasis.

The invention discloses a light-cured and degradable composite guiding bone regeneration membrane and its preparation method and application. The guiding bone regeneration membrane is composed of biodegradable polyester, collagen, magnesium powder or zinc powder, and a photoinitiator. Polyester fully infiltrates collagen and forms an interpenetrating network structure with collagen. Before photocuring, it has good plasticity and can adapt to the shape of bone defect; after photocuring, the degradable composite guiding bone regeneration membrane has certain supporting properties and can Maintain the space required for bone regeneration; at the same time, the biodegradable polyester wraps the collagen film, which reduces the degradation rate of collagen, prolongs the action time of the guided bone regeneration film, and provides sufficient time for bone repair. The addition of magnesium powder or zinc powder It can promote and increase the biocompatibility of materials, and improve the ability of guiding bone regeneration membrane to promote bone regeneration. The guided bone regeneration membrane is a new type of guided bone regeneration membrane that has the functions of support and barrier, and can simultaneously promote the regeneration of bone tissue.

The invention relates to a liposome calcium sulfate composite nanometer artificial boneware, as well as a preparation method and application thereof. The preparation method comprises the steps of well mixing liposome (1 to 40 percent), calcium sulfate powder (40 to 80 percent) and diluent (10 to 50 percent), curing the materials and then preparing a bone graft substitute containing nanometer liposome. The liposome can carry medicine and can modify surface, has two forms, namely solution and powder, and comprises traditional micromolecule liposome and macromolecule liposome having macromolecule characteristics. The invention can provide an artificial bone material which has nanometer reinforcing effects, function of sustaining and controlling medicine release, controllable degradation time, good biocompatibility and mechanical strength, can induce bone growth in vivo, and is beneficial to the healing of defective areas of bones.