52results about How to "Meet the requirements of green and sustainable development" patented technology

A vacuum thermal insulation plate core material comprises bamboo fibers and glass fibers. A vacuum thermal insulation plate comprises the core material. By adoption of the technical scheme, the novelvacuum thermal insulation plate core material is prepared by mixing the bamboo fibers with the glass fibers, the use quantity of the glass fibers in the core material is reduced, the cost of the vacuum thermal insulation plate is reduced, energy saving and environment friendliness are achieved, the severe issues of environmental pollution and energy shortage brought by the development of the economy are relieved, and the national requirement of environment-friendly and sustainable development is better met.

The invention discloses high-strength environment-friendly paper and a preparation method and application thereof. The preparation method of the high-strength environment-friendly paper comprises thefollowing steps: beating a bamboo pulp raw material to obtain SR bamboo pulp with the beating degree of 30-50 degrees; then pretreating the bamboo pulp or PLA fiber in a cationic guar gum solution; making paper from the pretreated bamboo pulp and the untreated PLA fiber, or the untreated bamboo pulp and the pretreated PLA fiber according to an absolute dry mass ratio of 7:3 to obtain the high-strength environment-friendly paper. According to the preparation method, through pretreatment in the cationic guar gum solution, the fiber strength of the bamboo fiber, the chemical polarity on the surface of the PLA fiber and the interfacial compatibility between fibers are improved, and ultimately, the physical properties of the paper are significantly improved. All used materials are environmentally friendly, and the obtained paper has relatively high strength and can be well applied to various fields of daily paper, food packaging paper and the like.

The invention discloses a kitchen waste oil-water-solid separation device consisting of a steam mixing section, a solid-liquid separation section and an oil-water separation section, wherein the steam mixing section is provided with a steam-water mixer; high-temperature steam is input from the steam inlet of the steam-water mixer; the absorption inlet of the steam-water mixer is communicated with a slag-liquid mixing groove; the injection port of the steam-water mixer is communicated with the input end of a solid-liquid separation machine; and the liquid exhaust port of the solid-liquid separation machine exhausts to an oil-water separator. According to the invention, the steam-water mixer for heating directly on a pipeline mixes high-temperature steam in crushing slag liquids, not only can the operation continuity be ensured, but also the whole treatment can be operated in a production line, continuity and scale mode, and moreover, mixed liquids output from the injection port has high temperature and high pressure, and enter the solid-liquid separator directly for solid-liquid separation, and additional delivery equipment is not required; and the efficiency is high, and the separation quality is good.

The invention discloses a high-strength polylactic acid functional composite material with antibacterial and electromagnetic shielding properties and a preparation method thereof. The composite material comprises the following components in parts by weight: 100 parts of polylactic acid, 2 to 6 parts of nano lignin, zinc oxide 5-15 parts per silver compound. The present invention is to carry out a controllable nanometerization of the original lignin, and prepare a zinc oxide / silver composite, and use the nano-lignin to disperse the zinc oxide / silver composite in situ and cast it with a polylactic acid solvent to prepare a composite with high mechanical properties. , excellent antibacterial performance and high-efficiency electromagnetic shielding function integrated polylactic acid composite material. The invention greatly broadens the scope of application of lignin, realizes the waste utilization of lignin resources, enables lignin to play the dual roles of enhancer and dispersant, and prepares a bio-based polylactic acid functional material with multiple functions based on integration, which can It meets the requirements of the harsh use environment in the market, and also conforms to the concept of green and sustainable development.

A fiber-reinforced concrete with ultra-high strength and high bonding performance and a preparation method thereof. The fiber-reinforced concrete is prepared according to the following weight ratio: cement: water: silica fume: quartz powder: quartz sand 1: quartz sand 2: quartz sand 3: quartz Sand 4: Water reducer: steel fiber = 850: 180-200:180-210:200:127:190:222:317:20-30:150-250. The preparation method is as follows: first pour all the quartz sand, cement and silica fume into the mixer in sequence, and stir; add water and water reducing agent, stir; add steel fiber, stir, and discharge. Under the condition of outdoor curing for 28 days, the compressive strength of the concrete is ≥140MPa, and the bonding strength with the deformed steel bar is ≥60MPa, which greatly improves the compressive strength of the concrete, and the bonding strength between the steel bar and the concrete can greatly improve the reinforced concrete components. Reinforcement ratio, reducing the thickness of the protective layer, improving the bearing capacity and durability of structural components, has good economic benefits.

The invention relates to a method for recovering magnesium chloride and co-producing tetrahydrofuran from Grignard reaction waste residue. The method comprises the following specific steps: step 1, dissolving: passing through N 2 Under the condition of protection, the waste residue of the complex is gradually added to the dissolved water, and a small amount of hydrogen peroxide is added to the dissolved water to oxidize trimethylphosphorus into stable trimethylphosphine, and a small amount of unreacted trimethylphosphorus can be Nitrogen enters the tail gas spray absorption device to be oxidized and absorbed; step 2, rectification and recovery of tetrahydrofuran: the dissolved material is rectified to recover tetrahydrofuran, and then a small amount of water is distilled to achieve the crystallization state of the substrate; step 3, magnesium chloride hexahydrate slices: bottom After the temperature of the product rises to a certain temperature, the solidification crystallization condition of magnesium chloride hexahydrate is reached, and it can be directly cooled and sliced ​​to obtain magnesium chloride hexahydrate. By adopting the technical scheme of the invention, while recovering the magnesium chloride in the Grignard reaction waste residue, tetrahydrofuran can be co-produced to increase the recovery benefit.