15 results about "Swelling capacity" patented technology

The invention provides a preparation method of microalgae gel balls for water treatment, and relates to the field of water treatment, and the preparation method comprises the following steps: step S1, preparing a composite suspension, step S2, carrying out primary crosslinking to form balls, step S3, carrying out secondary crosslinking, step S4, carrying out in-situ enhancement, and step S5, coating. According to the method, microalgae is subjected to compound modification to obtain gel beads, and the finished product gel beads are obtained through coating, so that the swelling resistance and mechanical strength of the gel beads are improved, and the situation that a compact gel network and a multi-layer coating structure hinder nutrient substances, carbon dioxide and the like in a water body from diffusing to microalgae cells is avoided; the photosynthesis efficiency and pollution degradation capability of the microalgae are ensured, and the water treatment efficiency of the microalgae is improved.

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 relates to a preparation method of a high-selectivity composite membrane for electronic-grade solvent separation, the high-selectivity composite membrane comprises a support layer, a middle layer and a separation layer, and the support layer is a porous PTFE nanofiber membrane prepared by a melting hot-pressing method; the middle layer is a vertically arranged COF middle layer formed by depositing COF nanosheets through an electric field auxiliary interface assembly method; the separation layer is formed by polyvinyl alcohol-graphene quantum dot-sulphobetaine through ultraviolet crosslinking and curing. The preparation method has the advantages that the COF middle layer is added, so that the water flux of the composite membrane is improved, the cross-linked PVA-GQD-SB layer is high in chemical swelling resistance, rich surface negative charges can well repel metal ions, and the separation selectivity is improved. The long-term stable operation of the composite membrane in the process of purifying the electronic-grade solvent is facilitated. The preparation method of the high-selectivity composite membrane is simple, and the prepared high-rejection-rate composite membrane has a wide application prospect.

The present invention relates to a test device for measuring liquid absorption (swelling) capacity of polymers on a mass basis automatically.

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 invention provides a method and a system for establishing a continuous cooling phase transition temperature model of steel. The method comprises the following steps: through a continuous cooling transformation experiment, acquiring swelling capacity, temperature and time data of a steel sample at two minimum cooling speeds; respectively drawing expansion curves of the steel sample at two minimum cooling speeds according to the acquired expansion amount, temperature and time data, and determining two phase change starting points and two phase change ending points at the two minimum cooling speeds according to the expansion curves; determining an intersection point of the two straight lines according to the two determined phase change starting points and the two determined phase change ending points; presetting an initial cooling point, determining a cooling speed of a third experiment according to the determined intersection point, and performing the third experiment to obtain a phase change starting point and a phase change ending point of the third experiment; and establishing a mathematical model of phase change temperature and time by using the three groups of phase change starting points and the three groups of phase change ending points. According to the method, the continuous cooling phase transition temperature of the steel can be predicted with the least number of experiments at high precision.

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.

The invention discloses an expansion measuring cup and method suitable for shale and rock debris, the device comprises a cup body and a base, an annular clamping groove is formed in the base along the circumferential direction of the base, and the cup body is clamped with the base through the clamping groove; an auxiliary inserting hole is vertically formed in the base, a metal rod is connected into the auxiliary inserting hole, and scale marks are further arranged on the cup body. The method comprises the following steps: placing a to-be-measured sample in the measuring cup for compaction; recording the scale value of the to-be-measured sample at the moment; adding liquid into the container, immersing the whole measuring cup into the liquid, and heating; after heating is completed, recording the scale value of the to-be-detected sample at the moment to obtain the expansion value of the liquid to the to-be-detected sample; replacing the liquid with kerosene, and repeating the steps to obtain the expansion value of the kerosene to the sample to be detected; and obtaining the expansion rate of the to-be-detected sample based on the expansion value of the liquid to the to-be-detected sample and the expansion value of kerosene to the to-be-detected sample. According to the method, the swelling capacity of shale and rock debris can be measured more quickly and efficiently, and a large amount of test time is saved.

A method for preparing a bifunctional In-MOG / BC adsorption-photocatalytic membrane includes the following steps: In(NO3)3·xH2O is weighed and dissolved in water, and sonicated until fully dissolved. 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine is weighed and added to water, along with TEA to promote its dissolution. The two solutions are mixed in a 1:1 volume ratio, resulting in the instantaneous formation of In-MOG at room temperature, which is evaluated using a tube inversion test. The prepared In-MOG is collected by centrifugation and washed several times with water, followed by freeze-drying to obtain In-MOG powder. The In-MOG powder is weighed and uniformly mixed with 0.85% w / w bacterial cellulose hydrogel, and the mixed gel is poured into a mold and freeze-dried to obtain the In-MOG / BC adsorption-photocatalytic membrane. This invention offers advantages such as simple preparation method, high plasticity, large swelling capacity, environmental friendliness, and easy separation and regeneration. It can effectively remove CTC and TTC from aqueous solutions through adsorption-photocatalysis synergistic removal.

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.