6 results about "Methoxypropane" patented technology

The invention discloses a preparation method of solar concentrating resin. According to the method, bi-phenolic methane and dimethoxypropane are dissolved in the molar ratio being 1:(8-12), meanwhile, 8-12 ml of a catalyst is added, and the mixture is heated to the temperature of 65-70 DEG C and has a reaction at the temperature for 28-32 min; the mixture is cooled to the temperature of 60 DEG C, a first part of liquid caustic soda is slowly and dropwise added, the mixture is heated, and the reaction temperature is kept to range from 65 DEG C to 70 DEG C, reflux is performed for 2 h, the dimethoxypropane which does not react is recovered in a reduced pressure manner, the mixture is cooled to the temperature below 65 DEG C, 55-65 ml of a solvent is added, meanwhile, a second part of liquid caustic soda is dropwise added, reflux is performed for 2 h, a solvent solution turns yellow and is cooled and washed with hot water, a water layer is separated until the solvent solution is transparent, the solvent is evaporated out, and the resin is prepared. The resin has the characteristics of high concentrating property, high precision, good weather resistance, low cost and the like and can comprehensively improve the efficiency and the quality of a solar concentrating power generation system in the aspects of the optical effect, the weather resistance and the technology.

This invention relates to the field of nanomedicine formulation technology, and discloses a ROS-responsive astaxanthin nanoparticle, its preparation method, and its application. The preparation method includes: catalyzing the transketalization reaction of 3-mercaptopropionic acid with 2,2-dimethoxypropane using an alcohol-water tolerant Lewis acid catalyst (preferably scandium trifluoromethanesulfonate) to prepare a thioketal monomer containing dual-terminated carboxyl groups; coupling the thioketal monomer with stearyl alcohol and methoxy polyethylene glycol using a stepwise sequential coupling strategy to construct an amphiphilic polymer with thioketal bonds as ROS-responsive connecting units; co-dissolving the polymer, astaxanthin, and tocotrienols in tetrahydrofuran, and preparing the nanoparticles using a multi-inlet micro-collision flow nanoprecipitation process. The resulting nanoparticles have a particle size of 100 nm to 200 nm, an astaxanthin encapsulation rate of 90% to 99%, and achieve targeted release in response to reactive oxygen species in the pathological microenvironment. Astaxanthin and tocotrienols synergistically exert antioxidant effects.

This invention belongs to the field of Chlorella application technology, specifically relating to a method for extracting nanocellulose from Chlorella, comprising the following steps: S1, defatting dried Chlorella powder using the methanol-chloroform method; S2, adding anhydrous acetone to the defatted Chlorella powder, then adding 2,2-dimethoxypropane and p-toluenesulfonic acid to react, and centrifuging to collect the precipitate after the reaction, obtaining protected Chlorella cellulose; S3, deproteinizing with an alkali method; S4, adding an acetic acid aqueous solution to the deproteinized protected cellulose, centrifuging to collect the precipitate after the reaction, washing the precipitate to neutral and then dialyzing to obtain deprotected Chlorella cellulose; S5, bleaching and purification; S6, preparing Chlorella nanocellulose. This invention, by adding 2,2-dimethoxypropane to defatted Chlorella powder, forms a stable protecting group, preventing cellulose degradation under strong alkali, thereby reducing the breakage and loss of cellulose molecular chains.

This invention discloses a low-temperature curable PI photoresist suitable for flexible substrates and its preparation method, belonging to the field of semiconductor electronic chemicals and flexible display manufacturing technology. The method involves dissolving an allyl-containing soluble polyimide resin in 2-acetoxy-1-methoxypropane, adding a mercapto-containing photocrosslinking component, a photoinitiator, and a heteroaryl base-type low-temperature curing accelerator to obtain a coating solution. This coating solution is then applied to a flexible substrate, followed by pre-baking, UV exposure, development, and rinsing, and post-curing at 180°C to 230°C to obtain a patterned polyimide film. This invention utilizes a soluble resin combined with a mercapto-olefin crosslinking system and a curing accelerator, avoiding the high-temperature closed-loop requirement of traditional PI precursors. This not only achieves low-temperature curing characteristics and reduces the risk of thermal damage to flexible substrates but also significantly improves the film's bending resistance and strain adaptability.

The invention relates to an electrochemical cell comprising: —at least one anode comprising metallic lithium or a lithium alloy or at least one anode comprising a current collector at least partially covered with metallic lithium deposited after at least one charge of the cell, the cell not containing metallic lithium at the time of its manufacture, —at least one cathode, —a liquid or gelled electrolyte composition comprising: a) a solvent comprising: i) either a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) and / or 1,1,1,3,3,3-hexafluoro-2-(fluoromethoxy)propane (HFMFP), ethylene monofluorocarbonate (F1EC) and 2,2,2-trifluoroethyl methyl carbonate (F3EMC), ii) or a mixture of 1,1,1,3,3,3-hexafluoro-2-methoxypropane (HFMP) and / or 1,1,1,3,3,3-hexafluo-ro-2-(fluoromethoxy)propane (HFMFP), ethylene monofluorocarbonate (F1EC) and 2,2,2-trifluoroethyl acetate (F3EA), b) at least one salt whose cation is the lithium cation, c) lithium difluorophosphate LiPO2F2 in an amount representing from 0.05 to 5% of the mass of the combination made up of the solvent and said at least one dissolved lithium salt.