48results about How to "Improve surface affinity" patented technology

A pavement repairing material 'Cuoliping' for the pavement of express way is composed of two components, which are proportionally mixed before them are applied. After it is applied to pavement, it can be solidified within tens min and quickly reach high strength (10-80 MPa).

The invention relates to a 3D-printed degradable macromolecular scaffold and photo-crosslinked hydrogel composite scaffold. The 3D-printed degradable macromolecular scaffold and photo-crosslinked hydrogel composite scaffold comprises a 3D-printed degradable macromolecular scaffold, wherein the interior of the 3D-printed degradable macromolecular scaffold comprises photo-crosslinked hydrogel with high substitution degree and photo-crosslinked hydrogel with low substitution degree, the photo-crosslinked hydrogel with high substitution degree is crosslinked with the photo-crosslinked hydrogel with low substitution degree, and preferably, a polycaprolactone (PCL) scaffold and methacrylic anhydride gelatin (GelMA) with different substitution degrees are crosslinked and compounded. In the composite scaffold, the 3D-printed degradable macromolecular scaffold has good mechanical properties; the photo-crosslinked hydrogel with high substitution degree has high crosslinking degree, can form a fiber network and micropores, and well supports cells; and the photo-crosslinked hydrogel with low substitution degree has multiple active sites, is beneficial to cell adhesion growth, and can adsorb alarge amount of nutrient solution. Through cooperation of the 3D-printed degradable macromolecular scaffold, the photo-crosslinked hydrogel with high substitution degree and the photo-crosslinked hydrogel with low substitution degree, the composite scaffold is suitable for cell growth and vascularization from an inner layer to an outer layer, and when the composite scaffold is used for medical human body repair, scaffold integration is realized to promote regeneration of new tissues.

The invention discloses a weatherproof and antibacterial polycarbonate engineering plastic and a preparation method thereof. The engineering plastic is prepared from the following raw materials in part by weight: polycarbonate, weatherproof resin ASA, an antibacterialagent, a flexibilizer, a compatilizer, a dispersing agent, an antioxygen and other aids. The preparation method comprises the following steps: a, respectively performing force air drying on the polycarbonate and the weatherproof resin ASA; b, weighing the antibacterialagent and the dispersing agent, and mixing the two uniformly; c, weighing the flexibilizer, the compatilizer, the antioxygen and other aids, and putting into a super mixer for dry mixing, together with raw materials in step a and step b; and d, putting the mixedmaterials in the step c into a twin-screw extruder, and performing melt extrusion for granulation. The weatherproof and antibacterial polycarbonate engineering plastic has the advantages of ageing resistance, yellowing resistance, good weatherability, and durable antibacterial function.

The invention discloses an airtight adhesive used for tire puncture prevention and a preparation method thereof, belonging to the technical field of tire manufacture and repair. The airtight rubber of the present invention is based on chloroprene rubber, natural rubber, bamboo powder, tackifying resin RX-80, high ammonia natural latex, KN4006 naphthenic rubber oil, rosin, zinc oxide, modified pineapple leaf fiber, accelerator DETU , silane coupling agent Si‑563, dispersant WB212, stearic acid SA, polyphenyl polymethylene polyisocyanate, antioxidant RD, sodium persulfate, biphenyl yellow G as raw materials. The present invention adopts high-ammonia latex, chloroprene rubber with good airtightness and natural rubber with good processability as the mixing system, and the properties of the colloids complement each other. At the same time, the modified pineapple leaf fiber is added to improve the rubber layer and the mouth glue during molding. The viscosity between the materials improves the tensile and tear strength of the rubber, and the various compounding agents cooperate with each other to jointly improve the bonding and repair performance of the product.

A pavement repairing material 'Cuoliping' for the pavement of express way is composed of two components, which are proportionally mixed before them are applied. After it is applied to pavement, it can be solidified within tens min and quickly reach high strength (10-80 MPa).

The invention discloses an air purifying filter screen and a preparation method thereof; the air purifying filter screen is composed of a carrier and a catalyst; the carrier is composed of foam ceramics, and the foam ceramics are activated by an acid activator and then are subjected to surface modification by a surface modification agent; the catalyst comprises manganese oxide, nickel oxide and cerium oxide. The preparation method of the air purifying filter screen comprises the steps: soaking the foam ceramics with the acid activator, carrying out activating treatment of the surface and internal gaps of the foam ceramics with the acid activator, then soaking the cleanly washed foam ceramics with the surface modification agent, dissolving a manganese salt, a nickel salt, a cerium salt and a surfactant in water, stirring the components at room temperature, then adding a strong alkali, adjusting the pH to 8.0-10.5, carrying out a reaction for 1-30 h, then filtering, and mixing the obtained filter slag with a silica micro-powder to obtain slurry; spaying the slurry to the surface and the pore passage interior of the carrier by a spraying machine; and finally, calcining for 0.5-6 h at the temperature of 200-450 DEG C. The prepared purifying filter screen has the characteristics of small wind resistance, firm adhesion and high purification efficiency.