9 results about "Swelling capacity" patented technology

The present application relates to the technical field of silicone glue, and particularly relates to a water plugging silicone glue and a preparation method thereof; the water plugging silicone glue comprises the following components: 80-90 parts of alkoxyl-terminated polydimethylsiloxane, 30-50 parts of plasticizer, 15-35 parts of filler, 3-8 parts of cross-linking agent, 1.5-3.5 parts of curing accelerator, 0.5-1 part of catalyst, 0.5-1 part of coupling agent, 0.5-2 parts of stabilizer and 5-8 parts of swelling fiber; wherein the swelling fiber is cross-linked PVA fiber; the cross-linked PVA fiber is used to replace natural fiber, so that the acid and alkali resistance is further improved, and the swelling capacity is also provided; the water plugging effect can be achieved without adding sandart glue and other swelling raw materials; the thickness and length of the cross-linked PVA fiber can be accurately controlled, so that the consistency of the silicone glue product quality is improved.

The invention provides a negative electrode binder, an electrode plate and a battery, the negative electrode binder comprises an inner core and a shell layer directly or indirectly grafted on the surface of the inner core, the inner core comprises a polymer containing an aromatic vinyl structure unit and a conjugated diene structure unit, the shell layer comprises a polymer chain segment containing a polar group, and the polymer chain segment is a polymer chain segment containing an aromatic vinyl structure unit and a conjugated diene structure unit. The polymeric chain segment containing the polar group is directly or indirectly grafted on the inner core. The binding property, swelling resistance and flexibility of the negative electrode binder can be improved, so that the cycle performance of the battery is improved, and the service life of the battery is prolonged.

The utility model discloses a pipeline rubber expansion joint anti-abrasion device which comprises a rubber outer sleeve, one side of the rubber outer sleeve is fixedly connected with a first flange, one side of the first flange is fixedly connected with a first connecting flange, one side of the first connecting flange is fixedly connected with an anti-abrasion lining, and the other side of the rubber outer sleeve is fixedly connected with a second flange. According to the pipeline rubber expansion joint anti-abrasion device, after the device is put into use, the rubber expansion joint is internally provided with the anti-abrasion lining, and the ceramic chips in the anti-abrasion lining have the characteristics of high temperature resistance, corrosion resistance and abrasion resistance, so that the expansion joint is prevented from being directly scoured by a medium; due to the fact that part of liquid can form vortexes to scour the inner wall of the expansion joint through medium turbulence, the silicone structural sealant is filled in the gap, the silicone structural sealant can block the gap and has a certain swelling capacity, the problem of back flushing is perfectly solved, and therefore the expansion telescopic performance of a system is guaranteed.

The application provides a preparation method of microalgae gel balls for water treatment, and relates to the field of water treatment, and comprises the following steps: S1, preparation of a composite suspension; S2, preliminary cross-linking to form balls; S3, secondary cross-linking; S4, in-situ strengthening; and S5, coating. The method is characterized in that the microalgae are modified to obtain gel balls, and then the finished gel balls are obtained through coating. The method not only improves the anti-swelling capacity and mechanical strength of the gel balls, but also avoids the dense gel network and the multi-layer coating structure from hindering the diffusion of nutrients, carbon dioxide and the like in the water body to the microalgae cells, so that the photosynthesis efficiency and the pollution degradation capacity of the microalgae are ensured, and the water treatment efficiency of the microalgae is improved.

This invention develops a self-calibrated colorimetric gel detection chip for rapid detection of Fe(II) concentration in water. Using this chip, after obtaining a colorimetric image by taking a photo with a mobile phone, a Fe(II) content detection model can be established using a volume self-calibration method, achieving accurate and rapid detection of Fe(II) concentration in water. The chip is prepared from the colorimetric reagent phenanthroline (PHEN), the gel carrier polyacrylic acid (PAA), and polyvinyl alcohol (PVA). This detection chip is based on a PAA-PVA composite gel composition. Benefiting from the high swelling capacity of PAA and the high salt resistance of PVA, the PAA-PVA interpenetrating network structure not only retains the original properties of PAA and PVA but also acquires unique properties unmatched by using these two polymers alone. This results in a colorimetric sensor device prepared from the PAA-PVA gel carrier that also possesses immediate responsiveness, long-term stability, and high efficiency and accuracy.

The invention relates to a preparation method of hemostatic hydrogel and a product thereof, in particular to hemostatic hydrogel synthesized by taking chitosan (CS) and meso-porous silicon (M) as main raw materials. The invention belongs to the field of nano biomedical materials. The hemostatic hydrogel disclosed by the invention has the advantages that (1) the hemostatic hydrogel disclosed by the invention has relatively good swelling capacity and hemostatic capacity of the hydrogel, and meanwhile, the rigidity of the hydrogel is enhanced by adding the mesoporous material, so that the hemostatic speed and the gel strength are balanced; and (2) the preparation method disclosed by the invention is simple in process and high in operability, and can further meet production and application requirements.

The invention discloses a preparation method and application of a liquid-liquid interface biomimetic membrane, and belongs to the technical field of membrane separation. Comprising the following steps: dissolving polydimethylsiloxane in n-heptane, adding a zeolite imidazole framework-8 (at) graphene oxide lamellar composite material, a cross-linking agent tetraethoxysilane and a catalyst dibutyltin dilaurate, and adjusting the pre-crosslinking viscosity; dropwise adding the mixed solution to the surface of deionized water, and spreading and partially cross-linking the membrane liquid at a liquid-liquid interface; the polytetrafluoroethylene base membrane and the membrane growing on the liquid-liquid interface are adhered and pulled out of the water surface, then crosslinking and heat treatment are carried out, and the mixed matrix membrane with the bionic scale structure is obtained. According to the invention, the zeolite imidazole framework-8 (at) graphene oxide nanosheet forms a bionic scaly structure on the surface of a polydimethylsiloxane matrix, and a bionic loose porous structure is formed inside, so that agglomeration is effectively avoided, mass transfer resistance is reduced, mechanical properties and swelling resistance are remarkably improved, a mass transfer channel is established, and the mass transfer efficiency is improved. The separation efficiency and the service life of the membrane are improved.

A process for producing superabsorbent particles by polymerizing a monomer solution, comprising the steps of continuously polymerizing the monomer solution on the continuous belt of a belt reactor, comminuting the polymer gel obtained, rinsing the polymer gel obtained on the underside of the belt reactor into a separation unit with water, separating the polymer gel from the water in the separation unit and recycling the polymer gel into the comminution, wherein the polymer gel has a swelling capacity in water of at least 100 g / g, the dwell time of the polymer gel in the rinse water is less than 40 minutes, and the separation unit has openings with a clear width of at least 1 mm.

The invention relates to the technical field of binders, and discloses a binder for a secondary battery as well as a preparation method and application of the binder. The binder for the secondary battery comprises latex particles, wherein the latex particles comprise a core polymer and a shell polymer coating at least part of the surface of the core polymer; the raw material monomers of the core polymer comprise a first double-bond-containing hydrophilic monomer, a double-bond-containing hydrophobic monomer and a first functional monomer; the mass of the double-bond-containing hydrophobic monomer is 1%-25% of the mass of the first double-bond-containing hydrophilic monomer; the first double-bond-containing hydrophilic monomer comprises acrylonitrile and a non-acrylonitrile double-bond-containing hydrophilic monomer; in the first double-bond-containing hydrophilic monomer, the mass ratio of acrylonitrile to non-acrylonitrile double-bond-containing hydrophilic monomers is (55: 45)-(95: 5); raw material monomers of the shell polymer comprise a second double-bond-containing hydrophilic monomer. The binder has excellent binding power, shear stability and dispersibility, and can provide good expansion resistance and electrical properties for the secondary battery.