4results about How to "Increase internal porosity" patented technology

The invention discloses a high-strength plant cellulose-based composite paperboard and a preparation method thereof, belongs to the technical field of paperboard materials, and aims to solve the technical problem that the strength and wet strength retention rate of a plant fiber-based composite paperboard in the prior art need to be further improved. The composite plant fiber layer is composed of a plant fiber layer and interface layers arranged on the two sides of the plant fiber layer in a modifying mode. A plant fiber layer is prepared through CMC modified plant cellulose, a PEG modified inorganic reinforcing agent and a bio-based toughening agent reinforced plant fiber, a composite structure of an interface layer, a fiber layer and an interface layer is formed by arranging a double-interface layer containing lignin nano particles / carboxylated nano cellulose, and a hot-pressing curing process is combined, so that the lignin / carboxylated nano cellulose composite fiber is prepared. The strength and toughness of the plant fiber-based composite paperboard are effectively improved, and the wet strength retention rate of the material is also effectively improved.

The invention discloses a donkey-hide gelatin cubilose with high water absorption rate and a preparation method thereof, and the preparation method of the donkey-hide gelatin cubilose comprises the following steps: carrying out steaming pretreatment on cubilose, and then carrying out freeze thawing treatment; soaking the treated cubilose in water until the cubilose is fully puffed; adding water into donkey-hide gelatin, heating and dissolving to form a donkey-hide gelatin solution And then adding the soaked cubilose into the donkey-hide gelatin solution for stewing, and immediately exhausting steam and cooling after heating is completed to obtain the donkey-hide gelatin cubilose product. By introducing a pretreatment process combining steaming and freeze thawing and matching with a reasonable stewing and cooling mode, the water absorption rate of the cubilose is effectively improved under the condition that the donkey-hide gelatin is added, and the problem of insufficient water absorption of a compounded product is improved; the obtained donkey-hide gelatin cubilose has the advantages of stable structure, full puffing, uniform texture, high nutrition compound degree and the like, and is suitable for industrial production, popularization and application of food.

This invention relates to the field of sound insulation technology and discloses a foamed aluminum-gypsum composite partition wall with high sound insulation performance. It employs a five-layer symmetrical composite structure: fire-resistant gypsum board, damping sound-insulating adhesive layer, gradient-pore-sized open-cell foamed aluminum core layer, damping sound-insulating adhesive layer, and fire-resistant gypsum board. Because the foamed aluminum core layer and fire-resistant gypsum board are bonded with environmentally friendly polyurethane structural adhesive and fixed with C-shaped cold-rolled galvanized light steel keel, the interlayer bonding is ensured to be firm and the overall rigidity uniform, preventing delamination and deformation during use. The partition wall joints utilize a double-sealing process of sealant and grooves. Internal flame-retardant sealant fills the gaps to block sound bridges and smoke passages, while external U-shaped PVC grooves combined with butyl rubber sound-insulating pads achieve full enclosure, improving long-term stability. It also boasts advantages such as lightweight, high strength, convenient construction, and good durability.

The present application relates to the industrial solid waste resource utilization and artificial aggregate technical field, specifically relates to a kind of preparation method of artificial aggregate.The specific technical scheme is as follows: including the following steps: (1) the slag, fly ash, red mud are ground and sieved, after heating treatment, mixed with activator, to obtain slurry;(2) the slurry is heated to condense, then, extrusion cutting, rounding, maintenance, alkali immersion, maintenance again, to obtain artificial aggregate.The present application solves the problem of large pore of spherical particles produced by disc granulation in the prior art.