3results about How to "Achieve selective adsorption" patented technology

The application discloses a kind of fibrous felt that can be all-weather fast recovery high viscosity crude oil, preparation method and its application.The fibrous felt includes the fibrous substrate formed by profiled cross-section fiber, and the binder layer, functional layer and hydrophobic coating sequentially loaded on its surface;Functional layer is used to generate Joule heat when energized and generate photo-thermal effect under light;The water contact angle of fibrous felt is greater than 140°.The application also provides its preparation method and application.The application integrates photo-thermal and Joule heat effect in the same felt, realizes all-weather operation ability;Use C-shaped or Y-shaped profiled cross-section fiber, accelerate the penetration and absorption of high viscosity crude oil;Through the synergistic effect of polypyrrole layer and MXene layer, the resistance is significantly reduced and the oil absorption time is shortened.The fibrous felt of the application has simple preparation process, and is suitable for all-weather oil spill recovery in complex environment such as ocean oil spill.

This invention relates to the field of homogenizing agent preparation technology, and discloses a composite VOCs concentration homogenizing agent and its preparation method. The homogenizing agent is mainly composed of powdered activated carbon, steam-activated attapulgite clay, and modified diatomaceous earth, combined with a compound molecular sieve, lubricant, and binder. First, the attapulgite clay is activated at high temperature with saturated steam to obtain modified clay. Then, the diatomaceous earth is modified with phosphonic acid and rapidly composited with nano-ZrO2 and mesoporous silica to obtain modified diatomaceous earth. Subsequently, the powder components are dry-mixed uniformly, water is added to form a mold, and then the product is obtained through step drying and heat preservation curing. This invention constructs an adsorption-slow-release synergistic multi-level porous structure through steam activation to open pores, synergistic modification with phosphonic acid and nano-oxides, and compounding of multi-level porous components. This structure can significantly suppress drastic fluctuations in VOCs concentration, providing a stable and long-lasting homogenization effect, and is suitable for VOCs homogenization treatment under fluctuating industrial waste gas concentration conditions.

The application discloses a kind of multilayer biomass cellulose adsorption materials and its preparation method and application, belong to biomass material and sewage treatment technical field.The application first obtains PEI-cellulose by polyethyleneimine modification to biomass cellulose;Then PEI-cellulose and chitosan are crosslinked to prepare surface layer adsorption liquid;While unmodified biomass cellulose and polyvinyl alcohol are mixed to prepare middle layer adsorption liquid;Finally, by layer liquid nitrogen freeze forming, freeze drying and alkali washing treatment, obtain the biomass cellulose adsorption material with sandwich multilayer structure.The multilayer adsorption material prepared by the application has positive electricity on outer layer, can be efficiently adsorbed by electrostatic effect in water with negative electricity micro / nano plastic;Middle layer is neutral, can be used to adsorb organic pollutants carried by micro / nano plastic.The material of the application is low in cost, simple in preparation process, fast in adsorption rate, high in removal rate and reusable, and has good application prospect in water treatment field.