4results about How to "Dense pores" patented technology

The invention belongs to the field of textile materials, and particularly relates to a preparation method of a banana nanocellulose-montmorillonite aerogel / paraffin composite phase change material. The preparation method comprises the following steps: by taking green, environment-friendly and low-cost banana raw hemp as a raw material, preparing the nano cellulose-montmorillonite aerogel by a physical and chemical combined method; paraffin is loaded into the nanocellulose-montmorillonite aerogel by adopting a vacuum impregnation method, and the nanocellulose aerogel phase change material capable of releasing heat for a long time is prepared. The preparation method comprises the following steps: (1) preparing banana nano cellulose; (2) preparation of nano cellulose-montmorillonite aerogel; and (3) preparing the nano cellulose-montmorillonite aerogel / paraffin composite phase change material. According to the banana nanocellulose-montmorillonite aerogel / paraffin composite phase change material prepared by the invention, the adopted raw materials are environment-friendly and low in cost; the nanocellulose aerogel is low in density, high in porosity and high in paraffin loading rate; due to the addition of montmorillonite, the heat conductivity coefficient is increased, the photothermal conversion is enhanced, and heat can be released for a long time.

The invention provides a preparation method of a europium porcelain sand filter material with a purification function, and belongs to the field of water pollution purification materials, and the method mainly comprises the following preparation steps: preparing europium modified porcelain sand, then preparing a titanium precursor, and finally carrying out hydrothermal membrane preparation. Through the step of modifying the porcelain sand with europium, part of metal elements on the surface of the porcelain sand are replaced by europium ions, and then through the step of hydrothermal film preparation, a titanium precursor reacts with the europium-modified porcelain sand to generate the europium titanate coating. The europium porcelain sand filter material disclosed by the invention has the characteristics of rich pores, strong filtering capacity, water flow impact resistance and the like; meanwhile, organic pollutants attached to the surface can be rapidly decomposed under illumination, and the performance of continuously treating the organic pollutants in wastewater is achieved.

The application belongs to the technical field of solid waste resource utilization and anti-seepage material, and specifically provides a reactive self-healing barrier material for a phosphorus-containing contaminated site and a preparation method thereof. The material takes a base material (an alkali-activated geopolymer system, a cement-bentonite-soil system and / or a plastic concrete system) as a main body and incorporates a phosphorus fixing agent as a key functional component. The phosphorus fixing agent has the ability to adsorb and fix the seeped phosphate, which can effectively block the erosion of the bentonite structure. Meanwhile, the active ions released by the phosphorus fixing agent can react with the phosphate to generate stable minerals, which can actively fill the cracks to realize the damage self-healing of the material. The application realizes the high-value utilization of construction solid waste, and the prepared material has excellent long-term anti-seepage performance and self-repairing capacity in the phosphorus contaminated environment, and is suitable for phosphorus mine waste site blocking engineering.