5 results about "Pith" patented technology

The invention relates to the technical field of adsorbents, and discloses a preparation method and application of a sunflower stem pith foam adsorption material.The preparation method comprises the steps that microfibrillated cellulose, quaternized chitosan and sunflower stem pith powder are put into a beaker to be mixed, a cross-linking agent is added, and stirring cross-linking is conducted; and then cryopreserving and thawing to prepare the composite sunflower stem pith foam adsorption material with the dispersed sunflower stem pith powder wrapped by the chitosan. Chitosan is used as a support to support and disperse sunflower stem pith powder, so that sunflower stem pith agglomeration is avoided, and active adsorption sites are increased. The adsorption capacity of the sunflower stem pith foam adsorption material prepared by the method is greatly increased, the adsorption capacity of Congo red is 9 times that of uncompounded sunflower stem pith, the performance is greatly improved, and the sunflower stem pith foam adsorption material can be applied to adsorption of hydrophobic and anionic azo dyes and has a good application prospect. The adsorbent has the advantages of low cost, simplicity in preparation, no chemical pollution, reproducibility, excellent adsorption performance and the like.

The invention relates to the technical field of biomass resource utilization and medical biological materials, in particular to a method for preparing a hemostatic sponge based on sunflower stem pith and application of the hemostatic sponge. The hemostatic sponge is prepared from sunflower stem pith fragments and an adhesive through a deconstruction-recombination technology and meets the requirements of isotropic liquid absorption, non-isotropic liquid absorption and non-isotropic liquid absorption; the difference between the axial blood suction rate and the radial blood suction rate is smaller than or equal to 10%, the shape memory recovery rate within 30 seconds after blood suction is larger than or equal to 85%, and the blood coagulation time is 60-100 seconds. According to the sunflower stem pith-based hemostatic sponge, sunflower byproducts serve as raw materials, the water absorption capacity and the hemostatic efficiency of the sponge are improved by means of the hydrophilicity and the procoagulant characteristic of the sunflower byproducts, and the raw material cost is reduced by 90% or above compared with that of existing synthetic sponge; the sunflower stem pith-based hemostatic sponge is constructed based on deconstruction and structural recombination, the limitation of a natural sunflower stem pith anisotropic microstructure is improved, the sponge has isotropic liquid absorption, the difference between axial and radial blood absorption rates is smaller than or equal to 10%, the sponge has shape memory ability, the sponge is compressed to 50% of the original volume after blood absorption, and the recovery rate is larger than or equal to 85% within 30 s.

The utility model relates to the technical field of tetrapanax papyriferus processing equipment, in particular to a modularized automatic coring device for tetrapanax papyriferus, which comprises a feeding mechanism, a section cutting mechanism, a feeding mechanism and a coring mechanism. The tetrapanax papyriferus stem cutting machine is reasonable and compact in structure, the feeding mechanism can automatically arrange tetrapanax papyriferus stems in order and continuously convey the whole tetrapanax papyriferus stems to the belt conveyor one by one, the shape righting mechanism can straighten bent tetrapanax papyriferus, the section cutting mechanism can automatically cut the whole tetrapanax papyriferus stems into a plurality of sections according to the set length, and the cutting efficiency is improved. The cut tetrapanax papyriferus stem sections can enter the feeding mechanism along the guide plate and are conveyed to the clamping assembly to be clamped, and finally tetrapanax papyriferus cores are jacked out of the tetrapanax papyriferus stem sections through the core taking mechanism. In the process, manual cutting is not needed, the degree of dependence on manpower can be greatly reduced, potential safety hazards are avoided, the ricepaperplant pith coring operation efficiency is high, the labor intensity of operators is reduced, all procedures can be automatically linked, and ricepaperplant pith coring operation can be continuously carried out.

A concrete composition based on binder, sand, gravel, water, and an elongated plant aggregate is described, where the binder comprises cement and the concrete composition, based on parts by weight per part cement, comprises 0.2 – 0.7 parts water, 1.8 - 3.0 parts sand, and 2.5 – 5.0 parts gravel and / or aggregate, and the elongated plant aggregate is selected from cut stem sections of grasses, hemp, Jerusalem artichoke, or flax or palm plumes and mixtures thereof, and where the elongated plant aggregate is formed by plant stem sections with a length of 10 – 80 mm which naturally comprise a hard, substantially dimensionally stable bark and a compressible pith, of which the natural volume of the pith is greater than the natural volume of the bark, from which pith has been removed, where the volume of the pith after removal is less than the volume of bark.

A growth medium for replacement of Sphagnum suitable for acid soil plants, as litter for chickens and as ground cover. A method to prepare such a growth comprises after harvest of a cellulosic plant material, a separation of the cellulose from pith material of the plant, a disinfection and an enrichment of the separated cellulosic material. Suitable plant material contains fiber with a high cellulose-content larger than 50weight%, where content of crystalline cellulose must be above 54%.