185 results about "Bifunctional" patented technology

The invention provides a bifunctional nano-enzyme SERS (Surface Enhanced Raman Scattering) detection platform for ultrasensitively detecting mi RNA (Ribonucleic Acid) related to cerebral infarction and a preparation method, and relates to the technical field of biomedical engineering. The preparation method comprises the following steps: synthesizing gold nanorods (AuNRs) by using a seed growth method, and growing Pt on the surface of a product to prepare gold platinum nanorods (Au (at) Pt NRs); the preparation method comprises the following steps: synthesizing gold nano hexagonal plates (AuNHs) by using a seed growth method, and preparing an AuNHs array through oil-water interface self-assembly; and modifying an aptamer complementary chain (H1) on the Au (at) Pt NRs obtained in the step (1) through an Au-S bond. And combining the assembled AuNHs array with a nucleic acid aptamer (cDNA) corresponding to mi R-106a-5p to functionalize the assembled AuNHs array in the step (2), so as to construct an SERS (Surface Enhanced Raman Scattering) detection platform. The target mi R-106a-5p can be specifically combined with cDNA, so that Au (at) Pt NRs carrying H1 are separated from the surface of an AuNHs array, TMB oxidation is reduced, and SERS signals are remarkably reduced. And according to SERS signal intensity, substituting the SERS signal intensity into a linear regression equation to realize quantitative detection of mi RNA.

Described herein are heterobifunctional small molecules, methods of making, pharmaceutical compositions and medicaments comprising such heterobifunctional small molecules, and methods of using such heterobifunctional small molecules are described herein, in the treatment of diseases and conditions, such as cancer, autoimmune diseases, and inflammatory diseases.

This invention relates to a method for synthesizing iron-cobalt alloy-doped carbon nanofibers for electrocatalysis using zinc oxide etching, belonging to the technical field of electrode materials and catalysts. The preparation method includes the following steps: 1) mixing DMF (dimethylformamide), PMDA (pyromellitic dianhydride), and ODA (4,4-diaminodiphenyl ether) in a certain proportion to prepare a PAA (polyamic acid) spinning solution; 2) preparing PAA nanofibers from the PAA spinning solution using an electrostatic melt-blowing device; 3) imidizing the PAA nanofibers using a programmed temperature rise method to obtain PI nanofibers; 4) impregnating the PI nanofibers in a salt solution; 5) carbonizing the impregnated PI nanofibers with a large number of metal ions on their surface in an inert atmosphere using a certain temperature rise program to obtain iron-cobalt alloy-doped carbon nanofibers. The iron-cobalt alloy-doped carbon nanofibers prepared by this method exhibit excellent performance as an ORR / OER bifunctional electrocatalyst and have wide applications.

The invention discloses a propolis extract-loaded sprayable bifunctional gel as well as a preparation method and application thereof. The preparation method comprises the following steps: synthesizing acetylated carboxymethyl chitosan by taking carboxymethyl chitosan and acetic anhydride as raw materials; the preparation method comprises the following steps: reacting acetylated carboxymethyl chitosan and aminophenylboronic acid serving as raw materials to synthesize a boric acid modified acetylated carboxymethyl chitosan gel precursor; the preparation method comprises the following steps: blending a boric acid modified acetylated carboxymethyl chitosan gel precursor with water, and self-assembling into A-CC-PBA hydrogel under the action of a hydrogen bond and a pi-pi bond; and adding the propolis extract into the A-CC-PBA hydrogel, so as to obtain the A-CC-PBA hydrogel. The gel prepared by the invention has good adhesion performance, can stably retain in the local part of the oral ulcer and can realize efficient targeted recognition and slow release of drugs to realize efficient sterilization and long-acting anti-inflammatory effects, the curative effect on the oral ulcer is obviously improved, and a new preparation type is provided for oral mucosa administration.

The invention belongs to the field of medicinal chemistry, and particularly relates to a compound shown in a formula (I), pharmaceutically acceptable salt, deuterated substance, stereoisomer, tautomer or a mixture thereof, which can be used as a protein degradation agent for degrading an androgen receptor or a spliceosome thereof. The compound can be used for preparing medicines for treating and / or preventing diseases related to androgen receptors or spliceosomes thereof. # imgabs0 #

The invention belongs to the technical field of chemical pharmacy, and particularly relates to a preparation method and application of an impurity of a beta2 adrenal receptor stimulant and M receptor antagonist bifunctional active compound. According to the impurity preparation method of the beta2 adrenal receptor stimulant and M receptor antagonist bifunctional active compound, acetylation of amino is successfully realized by using acetylation reagents such as acetyl chloride and alkali accelerators such as N, N-diisopropylethylamine, then debenzylation is performed through hydrogenation reaction, and the compound shown in the formula I is successfully prepared. Then, through liquid chromatography purification, a high-purity compound as shown in the formula I is obtained, and the raw material medicine as shown in JKN2304 can meet the requirements of reference substances in the research and development process; the technical problem that in the prior art, an impurity synthesis process of a beta 2 adrenal gland receptor agonist and M receptor antagonist bifunctional active compound is lacked is solved.

Polymerizable, radiation-curable compositions are provided and comprise (i) monomers and (ii) at least one further component, wherein the (i) monomers comprise (a) at least one urethane (meth)acrylate that is at least difunctional, (b) at least one monofunctional acrylate having an alicyclic group and / or at least one monofunctional methacrylate having an alicyclic group, and (ii) the at least one further component comprises (c) at least one photoinitiator for the UV and / or visible range or a photoinitiator system for the UV and / or visible range. The compositions are usable for producing, via a rapid prototyping, manufacturing, or tooling process, dental prosthetic parts, orthopaedic instruments, or dental pre-forms that have a flexural strength of greater than or equal to 75 MPa, a modulus of elasticity of greater than or equal to 2600 MPa, and / or a water absorption of less than 45 [μg / mm3].

The invention relates to the technical field of coatings, in particular to a high-efficiency photocuring monomer based on bio-based star-shaped polyester polyol and a preparation method of the high-efficiency photocuring monomer based on bio-based star-shaped polyester polyol. Castor oil derived trimethylolpropane is used as a core, adipic acid and epoxidized soybean oleic acid are introduced through a condensation polymerization reaction to form star-shaped structure polyol; an acrylate group is introduced into a polyol molecule through a glycidyl methacrylate ring-opening reaction, and an epoxy group in the epoxidized soybean oleic acid is retained; through unique molecular structure design, reasonable component selection and innovative process optimization, multiple technical breakthroughs are realized. The bio-based branching design has remarkable effects in the aspects of cost reduction and environmental protection; the reaction activity and the curing performance of the material are greatly improved through the synergistic effect of bifunctional groups; and the problem of environmental pollution in the traditional process is solved by green process integration. The invention provides a high-performance and environment-friendly novel photocuring monomer for the field of photocuring materials.

The invention discloses a transition metal doped base bifunctional CO2 adsorbent, a preparation method and application thereof. The transition metal doped base bifunctional CO2 adsorbent comprises a base bifunctional material and transition metal. The preparation method comprises the following steps: weighing transition metal, Ni, Na and Zr sources, mixing and dissolving in deionized water, stirring to form a uniform solution, weighing a precipitant, dissolving in deionized water, adding into the mixed system after complete dissolution, and stirring to form a uniform solution; stirring and precipitating the mixed system in a constant-temperature water bath kettle, drying the precipitate, calcining the obtained solid powder, and grinding into powder to obtain the transition metal doped base bifunctional CO2 adsorbent. The preparation method of the transition metal doped basic group difunctional CO2 adsorbent material is simple, a coprecipitation method preparation process is adopted, transition metal is doped into Ni-Na2ZrO3, formation of in-situ holes and pore channels is promoted, and the exposed area of active sites of the adsorbent is increased; meanwhile, the formation of lattice defects in unit cells is promoted, the surface energy of the crystal face of the material is changed from the physical dimension of a solid, and the adsorption capacity and cycling stability of CO2 are improved.

The application discloses a bifunctional HMGR mutant, which is obtained by replacing aspartic acid at the 154th amino acid of the amino acid sequence of natural HMGR with other amino acids. The application also discloses a nucleotide sequence and an amino acid sequence. The application further discloses a preparation method and application of the bifunctional HMGR mutant. The HMGR mutant of the application has high activity to both NADP(H) and NAD(H) substrates, and has significantly improved catalytic activity in a certain pH range.

The invention provides a novel bifunctional material and a preparation method and application thereof, and relates to the technical field of catalyst preparation, the bifunctional material has the following general formula: A-M / CaO-S, wherein A is an active component, M is an auxiliary agent metal, and S is a bifunctional material carrier; a is selected from at least one of Rh, Ru and Ni; m is selected from at least one of La, Ce, K and Na. According to the invention, the problems of tedious steps, low carbon efficiency, low energy efficiency and poor technical economy due to mutual independence of carbon dioxide trapping and chemical utilization processes are solved, and the technical effects of efficiently trapping carbon dioxide, catalyzing the reaction of carbon dioxide and methane in situ and successfully generating synthesis gas (H2 and CO) are achieved; and a solid scientific support is provided for economical efficiency and resource utilization of carbon dioxide.

The invention discloses a Cu-Al-Ca bifunctional material with a core-shell structure as well as a preparation method and application of the Cu-Al-Ca bifunctional material. A core of the Cu-Al-Ca bifunctional material is an Al-Ca adsorbent composed of Al2O3 and CaO, and a shell of the Cu-Al-Ca bifunctional material is metal Cu; wherein based on the total mass of the Cu-Al-Ca bifunctional material, the mass fraction of the metal Cu in the bifunctional material is 0.5-3.0 wt%, and based on the total mole number of the metal elements of the Cu-Al-Ca bifunctional material, the mole ratio of the Al element to all the metal elements is 1-10%. The Cu-Al-Ca bifunctional material has a stable structure, is not easy to sinter and inactivate, can be used for CO2 capture and in-situ reverse water gas shift preparation of CO, still has excellent CO2 absorption capacity, CO2 conversion rate and CO product selectivity after multiple times of cyclic utilization, and has high cycle stability.

The invention discloses a monomolecular bifunctional organic catalyst for ring-opening copolymerization of epoxide and cyclic anhydride. The structural formula of the monomolecular bifunctional organic catalyst is shown as a formula (I). In the formula (I), the structural formula of X is shown as the following formula (II-1) or (II-2), and in the formula, B is a boron atom; r1 is selected from alkyl; # imgabs0 # represents a connecting bond; the structural formula of Y is as shown in the following formula (III), wherein O is an oxygen atom; r2 is selected from one or more of Li, Na, K, Cs, quaternary ammonium cations and bis (triphenylphosphine) ammonium cations; l is selected from the group consisting of unsubstituted C4-C11 alkyl groups; the monomolecular bifunctional organic catalyst disclosed by the invention is specially used for the ring-opening copolymerization reaction of epoxide and cyclic anhydride, the TOF of the monomolecular bifunctional organic catalyst can be up to 13500h, and the prepared polymer has high molecular weight and low molecular weight distribution and also shows excellent air stability and thermal stability. # imgabs1 # (I); # imgabs2 # (II-1); 3 # imgabs3 # (II-2); and 4 # imgabs4 # (III).

The invention discloses a catalyst for photocatalytic coupling of CO2 reduction and HMF oxidation as well as a preparation method and application of the catalyst. The preparation method comprises the following steps: dissolving a noble metal precursor in a titanium dioxide dispersion liquid, and then adding a reducing agent for reaction; the catalyst for photocatalytic coupling of CO2 reduction and HMF oxidation is obtained. The Au-coated TiO2 Schottky heterojunction bifunctional photocatalyst prepared by the invention has the effects of simultaneously reducing CO2 and oxidizing HMF, electrons and holes are fully utilized, the CO precipitation efficiency can reach 17.6 [mu] mol g <-1 > h <-1 >, the yield of HMFCA reaches 34.6%, and the selectivity exceeds 95.0%. Visible light is used as energy to drive reaction, and energy consumption and environmental pollution are reduced. In addition, energy fuel and high-added-value chemicals can be synchronously produced, good environmental and economic benefits are achieved, harmful by-products are not generated in the whole photocatalysis process, and the principle of green chemistry is met.

Embodiments of the disclosure relate to methods of selectively depositing a metal after use of a flowable polymer to protect a substrate surface within a feature. A first metal layer is deposited by physical vapor deposition (PVD). The semiconductor substrate surface is exposed to one or more monomers to form a flowable and flexible polymer film on the first metal layer within the at least one feature. The flowable polymer film forms on the first metal layer on the bottom. The one or more monomers are selected from one or more of amines with bi-functional groups, aldehydes with bi-functional groups, cyanates with bi-functional groups, ketones with bi-functional groups, and alcohols with bi-functional groups. At least a portion of the first metal layer is selectively removed from the top surface and the at least one sidewall. The flowable polymer film is removed.

This invention provides a thiourea-tertiary amine bifunctional chitosan microsphere and its preparation method, belonging to the field of adsorption material technology. Through a stepwise functionalization and sequential crosslinking method, thiourea groups are first introduced onto the chitosan microspheres, followed by the introduction of tertiary amine groups and secondary crosslinking, successfully preparing chitosan microspheres possessing both thiourea and tertiary amine bifunctional groups. The thiourea and tertiary amine groups in the microspheres of this invention exhibit a synergistic adsorption effect on noble metal chloride anions, significantly improving the selective adsorption capacity and adsorption rate for noble metals such as palladium, platinum, and rhodium. Simultaneously, the dense three-dimensional network structure constructed through stepwise crosslinking greatly enhances the chemical stability and mechanical strength of the microspheres under strongly acidic environments, extending their service life. This preparation method is simple, mild, and environmentally friendly. The prepared adsorbent is particularly suitable for the efficient and selective recovery of noble metals from complex acidic wastewater or electronic waste leachates.

The invention discloses an oxygen-doped carbon nanofiber bifunctional electrocatalytic oxidation film and a preparation method and application thereof. The atomic ratio of nitrogen atoms to oxygen atoms in the oxygen-doped carbon nanofiber bifunctional electrocatalytic oxidation film is 11: (6-15). The catalytic performance of the electrocatalytic oxidation film can be improved by controlling the atomic ratio of nitrogen atoms to oxygen atoms in the oxygen-doped carbon nanofiber bifunctional electrocatalytic oxidation film, and then the catalytic efficiency of the electrocatalytic oxidation film is improved.

The invention discloses a preparation method and application of a high-selectivity chemical warfare agent fluorescent probe based on free radicals, and belongs to the field of fluorescent probe materials. The invention aims to solve the problem that the existing fluorescent probe is seriously interfered by protonic acid. The method comprises the following steps: 1, preparing CZ-DTE-C1; and 2, preparing a filter paper strip membrane by using CZ-DTE-Cl doped polyoxyethylene. The high-selectivity chemical warfare agent fluorescent probe based on the free radicals is used for detecting mustard gas, phosgene or sarin and has high selectivity. Compared with the traditional fluorescent probes, such as an organic metal compound probe, a nitrogen-oxygen bifunctional nucleophilic reagent probe, a nitrogen-based nucleophilic reagent probe and an oxygen-based nucleophilic reagent probe, the fluorescent probe provided by the invention is a novel free radical-based sensing reaction, and can simultaneously realize visual-fluorescent dual-mode detection of mustard gas, phosgene and sarin simulants; the selectivity is high.

The invention belongs to the field of new energy materials and technologies, and particularly relates to a non-noble metal difunctional electrolyzed water catalyst and a preparation method and application thereof. According to the non-noble metal bifunctional electrolyzed water catalyst, foam metal serves as a matrix, molybdenum carbide, iron-cobalt layered double hydroxides or derivatives of the iron-cobalt layered double hydroxides are evenly loaded on the matrix, and the molybdenum carbide and the iron-cobalt layered double hydroxides or the derivatives of the iron-cobalt layered double hydroxides are in contact doping to generate FeCoMo nano-particle heterojunctions in irregular shapes. The preparation process of the non-noble metal bifunctional water electrolysis catalyst is simple, the production cost is reduced, the production efficiency is improved, the performance of the catalyst is improved, and a more efficient, economical and environment-friendly catalyst solution is provided for hydrogen production through water electrolysis.

The invention provides a preparation method of a novel chiral thiourea / phosphine bifunctional organic catalyst with a cis-cyclic 1, 2-phosphinamine skeleton and application of the novel chiral thiourea / phosphine bifunctional organic catalyst in an asymmetric catalytic reaction. The chiral organic catalyst is prepared by taking cis chiral 2-(diphenylphosphine)-1, 2, 3, 4-tetrahydro-1-naphthylamine and an isothiocyanate compound as raw materials through a one-step reaction under a mild condition. The chiral thiourea / phosphine bifunctional organic catalyst is simple to prepare and stable in property, and shows excellent catalytic activity and stereoselectivity in an asymmetric hydrosilylation reaction of o-amido benzophenone.

The invention relates to the technical field of industrial wastewater denitrification, in particular to an industrial wastewater deep denitrification method based on a graphene adsorption material, which comprises the following steps: introducing industrial wastewater containing total nitrogen into an adsorption reaction unit; ammonia nitrogen and nitrate nitrogen in the wastewater are removed by adjusting the empty bed contact time; when the adsorption material is saturated, the particles are regenerated, and regenerated liquid is collected for nitrogen resource utilization. According to the core-shell type dual-functional graphene adsorption particle, rich amino functional groups on a PEI chain of the core of the core-shell type dual-functional graphene adsorption particle can efficiently and specifically adsorb and remove ammonia nitrogen through the ion exchange effect, the shell of the core-shell type dual-functional graphene adsorption particle is composed of magnesium-aluminum hydrotalcite growing in situ, exchangeable anions between hydrotalcite laminates can be subjected to ion exchange with nitrate nitrogen, and therefore the ammonia nitrogen can be removed through the core-shell type dual-functional graphene adsorption particle. Selective adsorption of nitrate nitrogen is realized; the synchronous deep removal of ammonia nitrogen and nitrate nitrogen in industrial wastewater is realized, the treatment efficiency is greatly improved, and the process flow is simplified.

The invention discloses a double-function (p) ppGpp synthetase or hydrolase mutant, a biological material and application of the double-function (p) ppGpp synthetase or hydrolase mutant to preparation of L-threonine, and belongs to the technical field of gene engineering. The technical problem to be solved by the invention is how to improve the yield of L-threonine. Relative to a wild type, the bifunctional (p) ppGpp synthetase or hydrolase mutant comprises one or more of the following mutations: K1) mutation of 174th amino acid of SEQ ID NO: 2 into cysteine, K2) mutation of 529th amino acid of SEQ ID NO: 2 into phenylalanine, and K3) insertion of histidine and aspartic acid between 84th amino acid and 85th amino acid of SEQ ID NO: 2. The bifunctional (p) ppGpp synthetase or hydrolase mutant provided by the invention can be used for improving the yield of L-threonine of Escherichia coli.

The invention belongs to the technical field of organic synthesis, and discloses a diastereoselective synthesis method and application of polysubstituted cyclobutane. The preparation method comprises the following steps: adding 3-methylene cyclobutyl tertiary alcohol, alkyl halide (or acyl and sulfonyl halide) and a photocatalyst into an organic solvent, and reacting in a nitrogen atmosphere and under the irradiation of a blue light LED lamp to generate cis-1, 3-bifunctional cyclobutane with a single configuration. The photocatalyst used in the method does not contain metal and is small in dosage, wide in substrate range and high in stereoselectivity. In addition, according to the invention, the product is successfully subjected to a one-step cyclization reaction under the action of alkali to generate polysubstituted bicyclo [2.1. 1] hexane. According to the application, heteroaryl with various structures is successfully introduced to bridgehead carbon of bicyclo [2.1. 1] hexane, and functional groups such as cyano groups and aldehyde groups which are easy to modify and convert as well as bromine atoms and fluorine atoms which are difficult to introduce in a traditional method are also introduced. The synthesis method has the advantages of high efficiency, simplicity, wide substrate universality, good functional group compatibility and the like.

The invention belongs to the field of chemistry and environmental technology, and relates to a preparation method of amidoximated COFs material with adsorption and detection of uranyl bifunctional. The present invention uses 3,4-diaminobenzonitrile and 2-hydroxy-1,3,5-benzenetricarboxaldehyde as raw materials, and obtains cyanated COFs material after reaction; The cyanated COFs material is subjected to amidoximation modification to obtain amidoximated COFs material with adsorption and detection of uranyl bifunctional. The amidoximated COFs material with adsorption and detection of uranyl bifunctional prepared by post-modification has high adsorption selectivity and faster adsorption kinetics (5.11mg / g / min) for uranyl, has unique and excellent adsorption performance for hexavalent uranium, is easy to recover and recycle, and is environmentally friendly.

Acylated benzene sulfonated compounds with dual functionality can have the following structure:wherein each R is independently hydrogen or a C1 to C11 alkyl, each X is independently an alkali metal ion, an alkaline earth metal ion, and / or a quaternary ammonium cation, n is 1 to 3, and m is 1 to 2, with the proviso that when m is 2, the —OC(O)R groups are not located in an ortho configuration at positions 1 and 2 of the benzene ring. Cleaning compositions including the acylated benzene sulfonated compound are also disclosed.

The invention relates to a difunctional gastrodia elata glycosyl transferase GaUGT015 gene and application thereof in preparation of gastrodin and arbutin, and belongs to the technical field of biology. The nucleotide sequence of the difunctional glycosyl transferase GaUGT015 gene of the gastrodia elata is shown as SEQ ID NO.1, and the total length of the sequence is 1407 bp; the amino acid sequence of the encoded protein is as shown in SEQ ID NO.2, and 469 amino acid residues are encoded. The gastrodia elata bifunctional glycosyl transferase GaUGT015 gene disclosed by the invention can be used as a biosynthesis regulation gene of gastrodin and arbutin, is applied to preparation of gastrodin and arbutin, and is remarkable in application prospect and easy to popularize and apply.

The invention provides a difunctional electrocatalyst prepared by using Joule heat and a preparation method and application thereof, and belongs to the technical field of new energy materials. The preparation method comprises the following steps: synthesizing an organic framework compound by adopting dimethyl imidazole, zinc nitrate and transition metal salt of cobalt (Co), then pyrolyzing to prepare a cobalt-nitrogen-doped carbon material with oxygen reduction (ORR) activity, mixing the cobalt-nitrogen-doped carbon material with a nickel compound and an iron compound respectively, and preparing the cobalt-nitrogen-doped carbon material. Nickel and iron compounds are reduced into alloy nanoparticles in an extremely short time by using Joule heat, and the alloy nanoparticles are directly loaded on the surface of a cobalt-nitrogen-doped carbon material to obtain a high-performance dual-function (ORR and OER) electrocatalyst which can be used as a cathode catalyst to be applied to a metal-air battery.

This invention discloses a three-dimensional hierarchical NiCo2S4@NiMo3S4 / CT bifunctional electrocatalyst, its preparation method, and its applications, belonging to the field of electrocatalytic materials technology in new energy technologies. This invention employs a combination of a two-stage hydrothermal method and an annealing method. A two-dimensional NiCo2O4 / CT precursor is grown on carbon cloth as a conductive substrate. After sulfidation, a framework NiCo2S4 nanotube array is obtained. A second hydrothermal method is then used to grow NiMo3S4 nanosheets on the NiCo2S4 / CT nanotubes. The ultrathin NiMo3S4 nanosheets provide more catalytic reaction sites, allowing the NiMo3S4 nanosheets to cover the surface of the NiCo2S4 nanotube array, thus forming a unique three-dimensional hierarchical NiCo2S4@NiMo3S4 / CT heterostructure bifunctional electrocatalyst. The three-dimensional hierarchical NiCo2S4@NiMo3S4 material obtained by this invention exhibits excellent catalytic performance, cycle stability, active sites, and a large specific surface area. The preparation method of this invention is simple, constructs a special interface, forms a rich defect and phase transition coupled electronic structure, and obtains a bimetallic sulfide with a heterostructure, which improves the electron transport rate and enhances the electrical properties of transition metal sulfides.

The invention discloses a preparation method and application of an acid-base bifunctional magnesium-aluminum bimetallic oxide catalyst, and relates to the technical field of biomass catalytic conversion and heterogeneous catalytic materials.The preparation method comprises the steps that firstly, magnesium nitrate hexahydrate and aluminum nitrate nonahydrate are dissolved into a metal salt mixed solution; dropwise adding a sodium hydroxide aqueous solution into the metal salt mixed solution to obtain a turbid solution; heating and crystallizing in a water bath, transferring into a reaction kettle, and putting into a drying oven for hydrothermal crystallization. The method comprises the following steps: synthesizing a hydrotalcite-like precursor through a coprecipitation-hydrothermal coupling method, and carrying out high-temperature roasting to obtain the acid-base bifunctional composite metal oxide. The acid-base bifunctional composite metal oxide has the beneficial effects that the acid-base bifunctional composite metal oxide has a layered structure and a high specific surface area and is suitable for a biomass pyrolysis-catalytic reforming process, an alkaline site of the acid-base bifunctional composite metal oxide promotes a deoxidation reaction, an acidic site of the acid-base bifunctional composite metal oxide promotes an aromatization reaction, and the acid-base bifunctional composite metal oxide can effectively regulate and control the composition of biomass pyrolysis volatile components; the content of oxygen-containing compounds is obviously reduced, and the selectivity of monocyclic aromatic hydrocarbon is improved.

The invention belongs to the field of high polymer materials, and relates to a high-performance layer structure PVC door curtain and a preparation method thereof. According to the door curtain, modified polyvinyl chloride resin is used as a matrix, and a polar gradient layered structure is formed by molecular chains through fluorine-silicon bifunctional group synergistic grafting modification; meanwhile, small organic molecule 2-vinyl-4-hydroxyacetophenone is introduced as a reinforcing agent, and a stable network is formed between layers through pi-pi accumulation and hydrogen-bond interaction. The door curtain is prepared from modified polyvinyl chloride resin, 2-vinyl-4-hydroxyacetophenone, epoxidized soybean oil, dioctyl phthalate and an auxiliary agent through blending granulation and three-layer co-extrusion molding. The structure effectively improves the interfacial compatibility and molecular arrangement uniformity, so that the material has high transparency, excellent flexibility and strong interface bonding force at the same time. The light transmittance of the prepared door curtain reaches 93% or above, the door curtain still keeps flexibility at 40 DEG C, the peel strength is high, the ultraviolet aging resistance is remarkably superior to that of a traditional PVC product, and the comprehensive performance is excellent.