25 results about "Smart polymer" patented technology

The invention discloses a method for improving the nitrogen utilization rate of eucalyptus in the field of forestry cultivation. The method comprises the following steps: deeply plowing a forest land before planting, measuring the nitrogen content of soil, preparing an activating agent containing citric acid, humic acid and ammonium molybdate, spraying, and shallow raking and uniformly mixing; ditching along planting rows, applying an MPCM material, earthing, and applying a microbial activator containing N-acyl homoserine lactone, trehalose and monopotassium phosphate through drip irrigation, so that a root system is in moderate contact with the material; the loss-control nitrogen fertilizer and the MPCM material are mixed in the planting period, the fast-growing period and before canopy closure, and then annular furrow application is carried out; by monitoring the nitrogen conditions of rhizosphere soil and leaves, a nutrient solution containing amino acid chelated nitrogen, urea and trace elements is sprayed on the leaf surfaces in good time. The MPCM material is prepared by performing pyrolysis on eucalyptus residues to prepare a charcoal substrate, performing metal doping and intelligent polymer grafting, loading nitrogen-fixing bacteria and ammonifying bacteria, and performing activation, so that accurate supply and efficient utilization of nitrogen are realized, and the growth benefits of eucalyptus are effectively improved.

This invention belongs to the field of biomedicine and biomaterials technology, specifically a spatiotemporally controlled release microsphere of human knee joint stem cell exosomes and its preparation method. The microsphere comprises a responsive functional shell, a bioactive anchoring core, and loaded exosomes. The shell is made of a smart polymer with mechanical relaxation properties. Non-covalent bonds are formed between the functional groups and the exosomes to constrain them. The preparation process includes exosome stabilization, core phase construction, shell composite emulsification and solidification. In application, it is based on a stress-off-resting-on mechanism. During the active phase, a barrier is built to prevent burst release, and during the resting phase, a mesh opening is used to achieve long-term uniform delivery. This application solves the problem of scale escape and repair rhythm mismatch, and significantly improves the utilization rate of bioactive factors.

A method for the extraction and enrichment of Hepatitis C Virus (HCV) antigens by conjugating specific antibodies targeting Envelope 1, Envelope 2, NS3, and NS4 antigens to a temperature-responsive smart polymer (NIPAAm-Co-HIPAAm-Co-SAKIPAAm). The application also relates to a detection kit for HCV antigens, comprising the smart polymer conjugated to specific antibodies, colloidal gold nanoparticles conjugated to specific antibodies, and instructions for detecting HCV antigens in serum, plasma, or whole blood samples.

The application belongs to the technical field of marine engineering antifouling, and particularly relates to a titanium alloy pipeline marine antifouling system based on a copper ion release and capture mechanism and a construction method thereof. The antifouling system comprises a titanium alloy pipeline main body, a copper alloy release source and an intelligent polymer brush modification layer grafted to the inner wall of the pipeline main body. The copper alloy release source and the titanium alloy pipeline main body form a galvanic couple in seawater medium to release copper ions, and the intelligent polymer brush modification layer comprises a pH-responsive polyacrylic acid main chain and covalently connected crown ether units. The application utilizes titanium alloy and copper alloy to realize self-driven and sustainable supply of copper ions; through a pH-responsive intelligent polymer brush, a dynamic interface with ion recognition and capture capability is constructed to realize "normal capture storage-fouling trigger release" of Cu 2+ , which does not require an external energy source and can realize on-demand and fixed-point release of antifouling agents, greatly improves the utilization efficiency, prolongs the antifouling life and significantly reduces the impact on the environment.

The invention belongs to the technical field of reverse osmosis membranes, and relates to a composite reverse osmosis membrane capable of automatically desorbing pollutants and a preparation method of the composite reverse osmosis membrane. Comprising the following steps: performing ultraviolet / ozone synergistic pretreatment on polysulfone particles; preparing microcrystalline trisodium citrate as a pore structure regulating agent; preparing a grafting stock solution of the temperature-sensitive monomer and the pH-sensitive monomer; preparing a base membrane rich in active sites through a phase inversion method; performing in-situ grafting of an intelligent polymer on the inner surface of the pore channel of the base membrane by adopting an oxidation-reduction initiation system; and finally, stabilizing the grafting layer structure through partition heat treatment circulation. The obtained composite reverse osmosis membrane can actively generate chain segment conformation transformation, and adsorbed pollutants are automatically and dynamically thrown away through micro mechanical force generated by swelling and shrinkage, so that self-cleaning and flux in-situ regeneration of the membrane are realized. The defects that a traditional reverse osmosis membrane depends on external chemical cleaning, an anti-pollution functional layer is prone to falling off and the like are overcome, and the long-term operation stability and the anti-pollution durability of the membrane are remarkably improved.

The invention relates to the technical field of formation liquid recycling, and discloses formation liquid recycling equipment and method.The output end of a waste water tank is provided with a first recycling unit and a second recycling unit which are arranged side by side and are the same in structure, the first recycling unit comprises a front membrane filtering tank, and the water outlet end of the front membrane filtering tank communicates with an RO membrane filtering tank through a water production pipeline; a plurality of layers of intelligent polymer filter membranes are arranged in the front membrane filter box, each group of intelligent polymer filter membranes is connected with a temperature regulation and control unit through an electric wire, and each group of intelligent polymer filter membranes is connected with an electric field regulation unit through a wire, so that specific impurities in the formation liquid can be effectively treated through introduction of the front membrane filter box; the RO membrane filter box is ensured to operate in clean liquid, the working efficiency of the membrane is improved, and the temperature regulation and control unit and the electric field regulation unit meet the filtering requirements of pollution of different concentrations and pollution of different ion concentrations by changing pores of the temperature-sensitive polymer membrane and charge distribution on the surface of the temperature-sensitive polymer membrane.

This invention discloses a cultivation substrate for Dendrobium officinale and its preparation method, relating to the field of cultivation substrate technology. The substrate is an integrated, molded modular structure, including an upper root growth zone and a lower intelligent water guiding system. The root growth zone has a three-dimensional air channel network to optimize gas exchange, a biomimetic rough outer surface to facilitate adhesion, pre-set modular nutrient unit slots for precise fertilization, and uniformly distributed compound probiotic agents to build a healthy rhizosphere. The intelligent water guiding system uses intelligent polymer materials sensitive to environmental humidity and temperature, which can adaptively regulate the water guiding rate to achieve precise and slow water supply. This substrate creates a three-dimensional growth microenvironment with dry and wet separation through the synergistic interaction of water, air, nutrients, and bacteria, thereby significantly improving the survival rate of Dendrobium officinale, promoting robust plant growth and quality improvement, and greatly simplifying cultivation management.

This invention belongs to the field of oil-based drilling fluid technology for oil and gas field drilling, specifically relating to a water-in-oil drilling fluid with a synergistic thickening effect of temperature and pressure and its application. The drilling fluid comprises a base oil phase, a brine phase, organic clay, a high-temperature resistant emulsifier, a wetting agent, a thickening regulator, a flow stabilizer, an alkaline substance, a filtration loss reducer, a plugging material, and a weighting material. The thickening regulator is a compound composition of a cyclic polyacid or its modified organic cyclic acid and an amidation product of an organic amine, possessing a multi-branched or network structure, which can significantly improve the low-shear rate viscosity and dynamic shear force of the drilling fluid under high temperature and high pressure. The plugging material in this invention is a temperature-sensitive intelligent polymer microsphere with temperature-responsive characteristics, capable of shrinking and agglomerating at high temperatures to achieve adaptive plugging. The drilling fluid of this invention exhibits excellent rheological stability, suspension capacity, and plugging performance under high temperature and high pressure conditions, making it suitable for the development of deep, ultra-deep, and extra-deep oil and gas wells.

The invention provides a water response hardness regulation intelligent polymer as well as a preparation method and application thereof, and relates to the technical field of polymer materials. The preparation method comprises the following steps: mixing a hydrophobic monomer (benzyl methacrylate), a hydrophilic monomer (polyethylene glycol monomethyl ether methacrylate), a cross-linking agent (polyethylene glycol dimethacrylate) and a photoinitiator, and carrying out cross-linking reaction on an obtained precursor solution under ultraviolet radiation to obtain the water-responsive hardness regulation intelligent polymer. The polymer prepared by the invention is soft in a dry state and is hardened after absorbing water, so that intelligent regulation and control of water response hardness are realized; the soft state can be recovered after water absorption hardening and leaving the water environment again, and the soft and hard switching reversibility is achieved. The water response hardness regulation and control intelligent polymer prepared by the invention can be freely shaped in a dry state, then absorbs water and is hardened, meanwhile, the requirement on high modulus during use is met, and the water response hardness regulation and control intelligent polymer has a wide application prospect in the fields of biomedicine and intelligent materials for repairing or replacing articular cartilage with irregular shape and high modulus requirement.

This invention discloses a photoresponsive multifunctional polyurethane material based on azophenylboronic acid and its preparation method, belonging to the field of photoresponsive self-healing materials technology. The material is prepared by a monool-terminated polyurethane containing an azophenylboronic acid structure, specifically by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and the monool containing the azophenylboronic acid structure in N,N-dimethylformamide at 70°C for 3 h. This invention introduces the azophenylboronic acid structure into the polyurethane system and utilizes the photoinduced reversible isomerization effect of azophenyl to achieve precise control over the dynamic covalent bond breaking and recombination of boron-oxygen hexacyclic rings. This design endows the material with excellent photo-induced self-healing properties, achieving a self-healing efficiency of 96.9% under 365 nm and 450 nm light irradiation. Simultaneously, the material also exhibits photoresponsive color change and humidity-responsive deformation characteristics, showing broad application prospects in the field of smart polymers.

The application belongs to the technical field of reverse osmosis membranes, and relates to a composite reverse osmosis membrane capable of automatically desorbing pollutants and a preparation method thereof. The application comprises the following steps: performing ultraviolet / ozone synergistic pretreatment on polysulfone particles; preparing microcrystalline trisodium citrate as a pore structure regulator; preparing a grafting stock solution of a temperature-sensitive monomer and a pH-sensitive monomer; preparing a base film rich in active sites through a phase inversion method; in-situ grafting of an intelligent polymer on the inner surface of the pore channel of the base film by using an oxidation-reduction initiation system; and finally, cyclically stabilizing the structure of the grafted layer through zonal heat treatment. The obtained composite reverse osmosis membrane can actively undergo a segment conformational transition, and through micro-mechanical force generated by swelling and shrinkage, the adsorbed pollutants can be automatically and dynamically desorbed, so that the self-cleaning and in-situ flux regeneration of the membrane are realized. The application overcomes the defects of traditional reverse osmosis membranes, such as dependence on external chemical cleaning and easy falling off of the anti-pollution functional layer, and significantly improves the long-term operation stability and anti-pollution durability of the membrane.

The invention relates to the field of biomedical engineering, in particular to a preparation method of a developable intelligent response lacrimal ductule embolism. The preparation method of the developable intelligent response lacrimal ductule embolism comprises the following specific steps: (1) taking cyclodextrin and a hydrophilic polymer, adding water for dissolving and mixing, adding a nucleating agent to prepare a water response supramolecular polymer system, and drying; (2) dissolving the dried intelligent response supramolecular polymer and an iodine-containing compound in an organic solvent, then dropwise adding into water, self-assembling to obtain an iodine-containing intelligent polymer material, and preparing a film through a casting method; the iodine-containing compound is an inorganic iodide, an organic iodide, iodate or other iodine compounds; (3) processing the film into a lacrimal ductule embolism material suitable for lacrimal duct implantation through a micromachining technology; the micromachining technology is a photoetching technology or an etching technology, and the lacrimal ductule embolism implanted into the lacrimal duct is a cylinder with the diameter of 0.2-1.0 mm and the length of 4-8 mm.

Systems and methods include techniques for using smart polymers. Units of smart polymers with heat sensitivity are inserted by a monitoring system into drilling fluid pumped into a well. The smart polymers are configured to be triggered by exposure to increasing levels of heat. An insertion timestamp associated with each unit is stored. Each insertion timestamp indicates a time that each unit was inserted. Continuous images and observed characteristics of returning mud exiting through an annulus of the well and containing the units of smart polymer are captured by a camera positioned at a sensing location and linked to the monitoring system. An estimate of temperatures at a drill bit of the drilling operation is determined using continuous images, observed characteristics, and insertion timestamps, based at least in part on executing image processing algorithms, machine-learning models, and deep-learning models. Suggested changes to be made to drilling parameters are provided.

An adjustable flexible shell used for cooperating with a soft robot is integrally formed by shape memory alloy or intelligent polymer materials, the flexible shell wraps the outer surface of a robot body, a heating wire array is embedded in the flexible shell, and the heating wire array is distributed in a grid shape and fixed in the shell. The flexible shell is provided with a plurality of electric heating wires, the electric heating wires are connected to an external control unit through wires respectively, the flexible shell is further provided with a plurality of partition structures, each partition corresponds to an independent electric heating wire area and is provided with a local temperature feedback element, and after the flexible shell is powered on and heated, local deformation or overall shape reconstruction is achieved. The shell disclosed by the invention adopts a polyester-based polyurethane and shape memory polymer composite system, so that the material has a modulus adjustable range near a glass transition temperature, and excellent ductility, tear resistance and fatigue resistance of a polyurethane matrix are retained, so that the shell can still maintain structural integrity in a repeated soft-hard switching process, and the service life of the shell is prolonged. Embrittlement or cracking caused by phase change circulation is avoided.

The application discloses a preparation method of a polymer light-adjusting film with passive radiation refrigeration characteristics. ‑1 ) just covers the atmospheric transparent window (8-13 mu m), so by reasonable design, selecting non-liquid crystal light-crosslinkable monomers (NLCM) with strong chemical bond vibration in the range, that is, mid-infrared emission monomers, further uniformly mixing the monomers with liquid crystal small molecules, a photoinitiator and spacer particles to form an isotropic liquid, and filling the isotropic liquid into a liquid crystal cell formed by a flexible transparent conductive film, a simple ultraviolet polymerization induced phase separation method is adopted to construct an intelligent polymer light-adjusting film with passive radiation refrigeration characteristics. The novel polymer light-adjusting film shows excellent electro-optic response, displays stable and reversible light switch characteristics, and can effectively actively control the sunlight band by applying a low threshold voltage, so as to control the indoor temperature on demand. In addition, the polymer light-adjusting film obtains a high infrared emissivity in the mid-infrared region, so it has the ability of passive radiation refrigeration, and thus shows great potential in large-scale optical and thermal management.

The invention belongs to the technical field of oil-based drilling fluids for oil and gas field drilling, and particularly relates to a water-in-oil drilling fluid with a temperature and pressure synergistic thickening effect and application. The drilling fluid comprises a base oil phase, a salt water phase, organic clay, a high-temperature-resistant emulsifier, a wetting agent, a thickening regulator, a flow type stabilizer, an alkaline substance, a filtrate reducer, a plugging substance and a weighting material. Wherein the thickening modifier is a compound composition of cyclic polyatomic acid or modified organic cyclic acid of the cyclic polyatomic acid and an amidation product of organic amine, has a multi-branched chain or net-shaped structure, and can remarkably improve the low-shear-rate viscosity and the dynamic shear force of the drilling fluid at high temperature and high pressure; the plugging substance is a temperature-sensitive intelligent polymer microsphere, has a temperature response characteristic, and can be shrunk and gathered at a high temperature to realize self-adaptive plugging. The drilling fluid disclosed by the invention shows excellent rheological stability, suspension capacity and plugging performance under high-temperature and high-pressure conditions, and is suitable for the development of deep, ultra-deep and extra-deep oil and gas wells.

The application discloses a kind of based on dynamic softening polycarbonate composite ring's free suture biological amniotic membrane and preparation method thereof.The based on dynamic softening polycarbonate composite ring's free suture biological amniotic membrane includes the amniotic membrane tissue piece of decellularization processing and the modified polycarbonate composite ring for fixing the amniotic membrane tissue piece;The modified polycarbonate composite ring includes polycarbonate continuous phase and the dispersed phase of intelligent polymer in it, and the intelligent polymer is PLGA-PEG-PLGA tri-block copolymer.The application is by specially-made PLGA-PEG-PLGA intelligent polymer and gives modified PC composite ring dynamic modulus adjustable characteristics.After the composite ring is implanted in eye, under the action of body temperature and tear, its contact surface modulus can be reduced by 40%-68% within 24 hours, realize from "surgical rigidity" to "in situ soft" adaptive change.This fundamentally greatly reduces the mechanical friction with cornea / conjunctiva, relieves the strong foreign body sensation, pain and irritation symptom of patient after operation.

The application discloses a high-temperature-resistant flocculant and a preparation method and application thereof, and the flocculant is prepared from coal gasification slag, so that the medicament cost of a coal gasification wastewater treatment stage is reduced; the intelligent polymer is introduced into the application, so that the flocculant can automatically adjust the structure and performance thereof according to the reaction temperature, the reaction pH and the ion concentration, so as to adapt to the complex and changeable wastewater treatment requirements, thereby reducing the dependence on the reaction conditions, and then reducing the complexity of the wastewater treatment process and the environmental condition control cost; the surface activity treatment is performed on the flocculant, so that the ability of the flocculant to capture heavy metal ions is improved, and thus the wastewater treatment effect is improved.

The invention relates to the field of fabric processing, and particularly discloses a processing method of an antibacterial garment fabric, which comprises the following steps: S1, by taking polyester chips as a matrix and water-soluble polyester as a pore-foaming agent, carrying out melt blending spinning and hot stretching setting, and weaving into a fabric gray fabric; s2, the gray fabric is wound around a center cylinder, and a gray fabric roll is obtained. And S3, placing the gray fabric roll in a hydrolysis device to hydrolyze ester bonds on the surfaces of fibers and dissolve the pore-foaming agent. And S4, washing the gray fabric roll with water, and placing the gray fabric roll in a rolling device to remove excessive moisture. S5, taking a cationic organic antibacterial agent as a first antibacterial agent, immersing the gray fabric roll into an antibacterial agent aqueous solution containing an anionic penetrant, and carrying out vacuum impregnation to enable the liquid medicine to permeate into the pore channels. And S6, pre-drying the gray fabric roll at 80-100 DEG C, spraying a cross-linking agent, baking at 160-180 DEG C, sealing an antibacterial agent, spraying a humidity response type intelligent polymer coating adhesive containing a natural broad-spectrum antibacterial agent, and drying at low temperature to obtain the porous functional membrane. The processing method of the antibacterial garment fabric has the beneficial effect that the antibacterial timeliness and durability are good.

The invention relates to the crossing field of functional polymer materials and biological nanotechnology, in particular to preparation of a self-alkali source intelligent polymer and application of the self-alkali source intelligent polymer in preparation of magnetic beads. Specifically, the self-alkali-source intelligent polymer is created for the first time, the molecular chain of the polymer synchronously integrates an alkaline functional group and a carboxyl precursor structure, and in the magnetic bead synthesis process, an alkaline reaction environment can be spontaneously constructed without additionally adding an alkali source to drive the generation of a magnetic nucleus; through simple post-treatment, the carboxyl precursor on the polymer can be efficiently converted into a carboxyl functional surface, so that the integrated preparation of the carboxyl functionalized magnetic bead is realized. Based on the intelligent polymer, the invention further provides a novel technology for preparing the magnetic beads through one-step nucleic acid extraction. According to the method, the technological process can be greatly simplified, the batch stability of the magnetic beads is effectively improved, and efficient and stable preparation of the nucleic acid extraction magnetic beads is promoted.

Herein is described a bioelectronic cell enrichment platform and methods of use thereof. Said bioelectronic cell enrichment platform comprising; a microelectrode array (MEA) comprising a glass substrate coated with a conducting surface layer and a smart polymer, said smart 5 polymer being coated with a capture substrate, said capture substrate being coated with a selective capture reagent, wherein said smart polymer comprises PEDOT:PSS / pNIPAAm; wherein said capture substrate comprises gold nanospheres (AuNP).

The application discloses a controllable pre-stressed intelligent material-based tactile sensor and a manufacturing method. The sensor is mainly composed of a circular boss layer, a packaging layer, an intelligent polymer structure layer, a sensitive layer, an upper electrode layer, a substrate layer and a lower electrode layer, which are stacked from top to bottom. A plurality of through holes are arranged in the substrate layer, the upper electrode layer and the lower electrode layer are connected through the through holes, the upper electrode layer is connected with an external circuit, the number and arrangement position of the circular boss, the intelligent unit and the sensitive unit are the same and are aligned, the method comprises the steps of manufacturing the intelligent polymer structure layer, manufacturing the conductive resistance network, manufacturing the packaged sensor, using light or heat to stimulate the intelligent unit, and applying pre-stress to the sensitive unit after the deformation of the intelligent unit. The application applies local controllable pre-compression to the sensor unit by using the structured shape memory material, effectively reduces the dead zone range, and greatly improves the detection ability of the flexible sensor array to low pressure signals in unstructured scenes.

The invention relates to the technical field of thermal control of spacecrafts, in particular to an intelligent pre-tightening device for a satellite locking mechanism and a thermal coating winding system and method. The intelligent pre-tightening device is made of an intelligent polymer composite material, can generate compressive plastic deformation through controlled heating softening and pressurization during assembly, and locks deformation after cooling, so that pre-tightening force for resisting emission vibration is actively generated and permanently kept. The intelligent pre-tightening device solves the problem that traditional mechanical locking is prone to loosening under vibration, and high-reliability locking is achieved. The system comprises the pre-tightening device, and an intelligent locking device and an intelligent furling device which are both made of intelligent materials and can be thermally recovered. The locking device is used for locking or releasing the furling device, and the furling device is used for furling or unfolding the hot coating; the system is driven by a heating system. The method comprises the steps that during ground assembling, heat-force coupling is conducted on the pre-tightening device to set the pre-tightening force, the locking device is firstly heated and unlocked during on-orbit assembling, and then the winding device is heated to conduct winding and hot wrapping.

The present invention relates to the technical field of functional polymer materials and stimuli-responsive smart polymer materials, and particularly relates to a branched polyamide and a preparation method therefor. The main chain of the branched polyamide has a pyrrolidone ring and is of a dendritic hyperbranched structure; and the lowest critical solution temperature of an aqueous solution thereof varies with concentration, and the range of changes in the lowest critical solution temperature is 16-37°C. In the preparation method of the present invention, itaconic acid and a diamine are used for preparing linear polyamide having a pyrrolidone ring on the main chain by means of a salt monomer method, and then a hyperbranched structure is formed by means of thermal shock. The preparation method is simple and convenient, easy in terms of post-treatment, and environmentally friendly. The prepared temperature-sensitive color-changing hyperbranched polyamide can provide different temperature response solutions to adapt to complex application scenarios.