12 results about "Polymer crystals" patented technology

SOLUTION: The present disclosure provides an optical diffusion film and a polarizing plate, the optical diffusion film 100 includes a polymer film layer 101 and grains 102 dispersed in the polymer film layer 101, the grains 102 include a crystallization seed and a polymer crystal 1022 attached to a surface of the crystallization seed, and the crystallization seed is a crystallization inducing agent 1021.EFFECT: The optical diffusion film and the polarizing sheet provided by the present disclosure can enlarge the viewing angle of the display device and improve the problems of color shift and rainbow pattern.SELECTED DRAWING: Figure 1

The invention relates to a tetracopolymer piezoelectric film for infrastructure monitoring, a preparation method and preparation equipment, the piezoelectric film comprises polyvinylidene fluoride, trifluoroethylene, chlorofluoroethylene and alkyne fluoride, the electromechanical coupling coefficient is 52%, the piezoelectric charge constant is 220 pm / V. The polyvinylidene fluoride, trifluoroethylene and chlorofluoroethylene are subjected to ternary polymerization, and the piezoelectric charge constant is 220 pm / V. A proper amount of FA monomer is introduced into the ternary polymer, part of CFE is replaced by the FA monomer, part of the FA monomer is embedded into a polymer crystal, the crystal spacing is reduced, a polymer chain is converted from loose 3 / 1 helical conformation to high-polarity all-trans conformation, and the size of a coherent crystalline region in X-ray diffraction is reduced. The proportion of the piezoelectric film has higher electromechanical coupling coefficient and piezoelectric charge constant, and meanwhile, the preparation equipment and the preparation method of the piezoelectric film improve the automation degree, the production efficiency and the production parameter control precision.

A piezoelectric element includes: a piezoelectric body having a first surface and a second surface that are different from each other; a first electrode provided at the first surface; and a second electrode provided at the second surface. The piezoelectric body contains a helical chiral polymer crystal having an orientation axis as a crystal axis, the orientation axis is uniaxially oriented in a manner of intersecting both the first surface and the second surface, and a degree of orientation of the orientation axis in the piezoelectric body is 0.80 or more.

The application discloses a luminescent coordination polymer crystal material based on a tetraphenylethylene pyridine ligand and a preparation method and application thereof, the chemical formula of the luminescent coordination polymer crystal material is [Cu(L)SCN.DMSO]n, wherein L is a 4.4'-[(2,2-diphenyl ethylene)di-4.1-phenylene]bis[pyridine] ligand, and n is an arbitrary value; wherein a Cu ion forms a two-dimensional structure with the 4.4'-[(2,2-diphenyl ethylene)di-4. n The crystal material can be used for fluorescence quenching detection of water-phase methyl orange; compared with the prior art, the crystal material is simple and reliable in application, the quenching constant of the crystal material for detecting water-phase methyl orange is as high as 1.9*10 6 M ‑1 , and the detection limit is as low as 0.019 mu M, so the crystal material is a luminescent coordination polymer crystal material for extremely sensitive detection of methyl orange at present and has a wide application prospect.

The invention relates to the technical field of electronic information, in particular to a preparation method of an N-type polymer transistor based on an electrolyte gate dielectric. Comprising the following steps: preparing a semiconductor solution and a gate medium solution, wherein the gate medium solution is prepared by jointly dissolving a polyvinylidene fluoride-trifluoroethylene copolymer P (VDF-co-TrFE), an ionic liquid and a polymer matrix in a solvent; a source electrode and a drain electrode are manufactured on a substrate by using gold metal particles in a thermal evaporation mode. And spin-coating a semiconductor solution on the substrate, and performing annealing treatment to form a polymer semiconductor layer. And spin-coating a gate dielectric solution on the semiconductor layer, and performing annealing treatment to form a solid electrolyte gate dielectric layer. And preparing an aluminum gate electrode by thermal evaporation to obtain the N-type polymer transistor based on the electrolyte gate dielectric. According to the method, the working voltage of the device can be greatly reduced, the performance of the device is improved, the short-range memory characteristic is shown, and the method has the advantages of being simple in process, high in stability and low in cost.

The application discloses a kind of crystal porous polymer composite membranes for lithium-magnesium separation and preparation method thereof, and the composite membrane includes a porous substrate film playing a supporting role and a covalent organic framework porous polymer crystal film covered thereon, and the surface defects of the crystal film are covered and plugged by the ultra-thin polymer film generated by interface condensation.The application covers and plugs the gap defects by the interface condensation film means of two reaction monomers at the film defect position of grain gap and growth discontinuity, and the processing mode only needs to immerse the crystal film with defects in aqueous solution and oil phase solution containing reaction monomers in sequence to quickly complete the repair of surface defects, and the method is simple in operation, low in cost and strong in universality.

The invention relates to the technical field of electronic information, in particular to a preparation method of an N-type polymer transistor based on a titanium / aluminum / titanium laminated contact electrode. Comprising the following steps: preparing a semiconductor solution and a gate medium solution, wherein the gate medium solution is prepared by dissolving n-butyl acrylate in a solvent; a source electrode and a drain electrode are prepared by laminating titanium, aluminum and titanium metal particles on a substrate in a vacuum evaporation manner. And performing annealing treatment on the spin-coated semiconductor solution to form a polymer semiconductor layer, and performing annealing treatment on the spin-coated gate dielectric solution to form a polymer gate dielectric layer. And then preparing an aluminum gate electrode by thermal evaporation to obtain a target transistor. According to the method, bipolar transport of the donor-acceptor (bipolar) copolymer field effect transistor can be changed into unipolar transport, off-state current is reduced, the performance of the N-type polymer transistor is improved, meanwhile, cost is reduced, and conditions are created for achieving a complementary circuit.

The invention discloses a luminescent crystal material based on a carbazolyl pyridine ligand, a preparation method thereof and application of the luminescent crystal material in ratiometric fluorescence detection of trifluoroacetic acid, the luminescent coordination polymer crystal material [Cd (L) I2. DMAC] n is prepared based on a 2, 7-bis (pyridine-4-yl)-9H-carbazole ligand for the first time, the method is simple, the synthetic route is simple and easy to control, the product yield can reach 35.6%, and the preparation method is suitable for industrial production. The method is suitable for industrial production. Compared with a coordination polymer through fluorescence quenching detection, the material realizes the ratiometric fluorescence detection of TFA by the coordination polymer for the first time, the sensitivity is extremely high, the sensitivity of ratiometric fluorescence detection of water-phase TFA is 385% per pH unit, the detection limit is as low as 0.35 mu M, and the material has a wide application prospect.

The invention discloses a polymer crystal constructed based on reversible N-B bonds and a preparation method, the polymer crystal is formed by triangular planar boron ester and 4-4 '-dipyridyl through the N-B bonds, and an asymmetric unit of the polymer crystal comprises one boron ester and 1.5 4-4'-dipyridyl; three B atoms in the triangular planar boron ester are respectively connected with N atoms in pyridine through reversible N-B bonds to finally form a polymer chain, and the chain also comprises a quadrilateral structure which takes four 4-4 '-bipyridyl as edges and takes a central benzene ring of the planar boron ester as a vertex. The polymer crystal can be applied to photocatalytic production of hydrogen peroxide. The dynamic reversibility of the bond allows the material to be self-corrected in the synthesis process, a highly-ordered crystal structure is formed, and meanwhile, the light absorption, charge separation and transmission efficiency is improved.

The invention provides a polymerizable precursor composition, polymer crystal gel and a preparation method and application thereof, and relates to the technical field of intelligent materials. The polymerizable precursor composition comprises a first monomer, a second monomer, polyethylene glycol and an initiator; the first monomer and the second monomer can be polymerized to form a cross-linked polymer network; the polyethylene glycol can be dispersed in the cross-linked polymer network and is at least partially in a crystalline state; the molecular weight of the polyethylene glycol is not less than 2000; the first monomer is an acrylic monomer; the second monomer is an acrylate monomer of ethylene glycol or ethylene glycol monomethyl ether. Autonomous crystallization of high-molecular-weight polyethylene glycol is regulated and controlled through a specific monomer network, spontaneous enhancement can be achieved at the room temperature without external triggering, and the problem that a traditional material depends on external stimulation and is unstable is solved. The modulus and the toughness of the material are remarkably improved through the unique microcrystal network structure, and high-strength self-adaptive bonding is achieved.

The invention discloses a roadbed recycled aggregate gradient proportioning method based on industrial waste residues, and belongs to the technical field of solid waste resource utilization and road engineering materials. In order to solve the problems that in the prior art, recycled aggregate is insufficient in strength, heavy metal leaching exceeds the standard, and the structure is uniform and cannot be matched with working conditions, steel slag, fly ash and the like are adopted as basic raw materials, and two key auxiliaries are introduced: one is a silicate-aminopolycarboxylic acid core-shell structure chelating excitant which can stably promote a hydration reaction to improve strength, and the other is a silicate-aminopolycarboxylic acid core-shell structure chelating excitant; the internal chelating group can also efficiently solidify heavy metal ions such as chromium and the like; 2, a pH response type polymer crystal form directing agent; the additive and the basic raw materials are mixed and molded, and then gradient humidity curing is carried out; according to the method, the aggregate spontaneously forms an upper-tough and lower-rigid gradient structure with a loose upper part and a compact bottom by utilizing the synergistic effect of the pH sensitivity of the guiding agent and the gradient humidity field, so that the method can better adapt to the working conditions that the top of the road base is pulled and the bottom is pressed, and the durability is improved; the recycled aggregate prepared by the invention has high mechanical strength, excellent environmental protection performance and a gradient functional structure.