13 results about "Intermolecular force" patented technology

This invention relates to the field of optical thin film fabrication technology, specifically to a method for fabricating a high extinction ratio, adhesive-free polarizing beam splitter film resistant to high and low temperature environments. The method includes the following steps: S1, substrate pretreatment; S2, polarizing beam splitter film deposition; S3, adhesive-free bonding treatment; S4, annealing strengthening; and S5, post-treatment. This invention uses an adhesive-free optical contact bonding process to replace the traditional organic bonding process, completely eliminating the temperature adaptability bottleneck caused by organic adhesive layers. The bonding interface relies on intermolecular forces for adhesion, eliminating problems such as aging and debonding of organic adhesives. This allows the device to operate stably in a wide temperature range of -60℃ to 120℃, greatly improving the device's environmental adaptability and meeting the needs of extreme environments such as deep space exploration and polar observation.

This invention provides a high-performance, high-precision gradient pore ultrafiltration membrane and its preparation method, belonging to the field of membrane preparation technology. Lithium chloride can alter the thermodynamic properties of the casting solution, affecting the aggregation state of polymer molecules and the phase separation process. CTAB has multiple functions in the phase inversion membrane preparation process; as a non-solvent additive, it regulates the phase separation behavior of the polymer PVDF, promoting the formation of more uniform nanoscale channels. DOP has a unique molecular structure and physicochemical properties, playing a multifaceted role in improving membrane performance; by inserting itself between PVDF molecular chains, it weakens the intermolecular forces, making the molecular chains more loosely arranged, thereby forming more interconnected channels and increasing flux. Simultaneously, it helps to form a narrow pore size distribution, reducing macropore defects and improving retention accuracy. This invention, through the mixing of the above substances, effectively achieves a high-porosity, nanoscale pore structure, realizing a high-performance, high-precision gradient pore ultrafiltration membrane preparation method.

This invention discloses an environmentally friendly curcumin nanocrystal and its preparation method, relating to the field of nanoparticle technology. The nanocrystal has a core-shell structure, with a core of curcumin crystals and a shell of hepatin peptide molecules bonded together by intermolecular forces. The average particle size of the nanocrystal is 50-200 nanometers, and it is completely dispersed and stable in an aqueous phase, containing no organic solvents or synthetic surfactants. This invention utilizes a pectin-chitosan complex to microencapsulate the nanocrystal, enabling it to resist gastric acid degradation and target release to the colon, thus precisely acting on the gut-hepatic axis and significantly improving bioavailability and hepatoprotective efficacy. While completely avoiding organic solvents and synthetic stabilizers, it simultaneously solves four major industry challenges related to curcumin: solubility, stability, targeted delivery, and synergistic efficacy, providing a new technical path for developing high-end, naturally derived hepatoprotective products.

This invention discloses a berberine hydrochloride-resveratrol self-assembled nanopesticide, its preparation method, and its application. The preparation method involves dissolving berberine hydrochloride and resveratrol separately in an organic solvent, mixing them in a molar ratio of 3:1–1:3, adding the mixture to deionized water, and then adding an alkaline solution; the mixture then self-assembles to obtain nanoparticles. Based on the principle of supramolecular construction, this invention utilizes the high compatibility of berberine hydrochloride and resveratrol in charge distribution and spatial geometry. Through multiple intermolecular forces such as electrostatic attraction, π-π stacking, and hydrogen bonding, the precise recognition and directional assembly of the two active molecules in the aqueous phase are achieved. This nanopesticide requires no additional synthetic adjuvants or nanocarriers, achieving confined enrichment of the active ingredients at the nanoscale, resulting in a significant synergistic effect. This nanopesticide significantly enhances the inhibitory activity against various pathogens such as *Botrytis cinerea*, *Fusarium oxysporum*, *Phytophthora capsici*, and *Rhizoctonia solani*, and exhibits excellent environmental biosafety.

The present invention relates to the technical field of new energy materials, and in particular relates to a self-assembled monolayer material and the use thereof. In the present invention, a conjugated unit having an intramolecular conformational lock or a fused ring structure is introduced into a self-assembled monolayer material having a functional framework, which enhances the intermolecular interaction and coplanarity, thereby improving the film-forming property of the material and enhancing the overall compactness and stability. When the material is used as a hole transport layer material or used in hole transport layer modification, the efficiency and stability of a photoelectric device can be effectively improved.

The disclosure provides a perovskite film containing a bifunctional additive, a light-emitting diode and a preparation method thereof, wherein the bifunctional additive has a structure as shown in formula (1): wherein A1 is selected from C1-C5 alkyl; X is selected from at least one lone pair electron group containing N, O, F, Cl, Br and I, the lone pair electron group forms an intermolecular hydrogen bond self-assembly structure with the amino group in formula (1) as a physical spacing layer, inhibits the loss of non-radiative energy of the perovskite film caused by the generation of low-energy state exciton complexes at the interface of the charge transport layer, and passivates the unsaturated lead dangling bond caused by halide vacancies, thereby reducing defects in the perovskite film. By using the hydrogen bond or intermolecular force formed between the amino group in the additive and the amino group in formamidinium hydroiodide in the perovskite system, the grain growth during the perovskite film formation process is slowed down, thereby inducing the FAPbI3 perovskite film to have higher crystallinity, and improving the quality and light-emitting efficiency of the film.

This invention relates to the fields of polymer materials and textile engineering, and discloses a high-toughness polyester fabric and its preparation method. The fabric is composed of polyester fibers, a borate-aluminum phytate-silica doped modifier, hydroquinone, and various auxiliaries. The borate-aluminum phytate-silica doped modifier is composed of a dynamic network of borate esters formed by boric acid and polyvinyl alcohol, a coordination structure formed by phytic acid and aluminum ions, and silica doping. By constructing a synergistic reinforcement system with dynamic reconstruction capabilities and multi-point interfacial interactions, and combining this with the regulation of intermolecular forces by hydroquinone, the modified structure is uniformly distributed at the interface and within the polyester fibers, thereby significantly improving the fabric's elongation at break, impact resistance, fatigue resistance, and abrasion resistance. The method of this invention is simple, highly applicable, and yields a polyester fabric with excellent comprehensive performance and promising application prospects.

The application belongs to the field of organic polymer compounds and its preparation and chemical processing, and provides a nano-porous flexible aerogel for ultra-wideband wireless communication and a preparation method thereof. The aerogel is composed of a polyimide matrix material and an air phase distributed in the polyimide matrix material, the polyimide matrix material has a nano-porous structure, the polyimide matrix material is formed by copolymerization of fluorine-containing and xanthene dianhydride monomers and diamine monomers, and then sequentially subjected to chemical crosslinking of a crosslinking agent, chemical imidization, and assembly of molecular chains after chemical imidization through intermolecular forces; the pore size of the nano-porous structure is not more than 100 nm, and the porosity of the aerogel is 89% to 92%. The application can reduce the interface reflection, scattering and absorption of electromagnetic waves of the existing aerogel, reduce the loss of electromagnetic waves in the transmission process, and the aerogel of the application can realize efficient wave transmission and transmission of electromagnetic waves in the frequency band of petahertz, terahertz and gigahertz.

The application discloses an epoxy adhesive which can be used for bonding PA6 and PP films and a preparation method thereof. The epoxy adhesive is internally introduced with a polar group amide bond, and a strong bonding strength between the epoxy adhesive and PA material is generated through intermolecular force (hydrogen bond). The epoxy adhesive not only improves the wettability of the adhesive matrix to the PA polar material, but also forms a large number of hydrogen bonds between the adhesive and the PA polar material, so that the bonding strength is enhanced. Meanwhile, the epoxy adhesive itself is non-polar, and the non-polar group has good compatibility with polypropylene in the curing process, so that the epoxy adhesive is well bonded to the PP film through molecular chain entanglement. The epoxy adhesive can significantly improve the bonding strength between the PA6 and the PP film, and further improve the performance of the composite film.

The present application belongs to the technical field of biological materials, and relates to a dissolving solution for dissolving tussah silk, a dissolving method and a tussah silk protein solution. The tussah silk is a natural protein fiber of medium and short types, and the main amino acid composition of the silk fibroin is alanine (about 43.1%), glycine (about 27.27%) and serine (about 11.25%), and the characteristic amino acid sequence is (-Ala-) n . The alanine repeat sequence forms a crystalline region of the tussah silk, in which nonpolar groups are dense, the peptide chains are regularly arranged, and the hydrogen bonds between the peptide chains and the intermolecular forces are strong, so that the tussah silk has high breaking strength and tensile properties, but it is also difficult to be dissolved in conventional solvents. In view of the above problems, the present application provides a new dissolving system, which can efficiently and environmentally realize the dissolution of the tussah silk under mild conditions, and well maintain the structural integrity of the silk fibroin, thereby providing support for the application of the tussah silk in high-end textiles and biological materials.

The application provides a milk protein source urokinase-type plasminogen activator inhibitory peptide and application thereof. Through a combination of virtual screening by molecular docking and in-vitro experiment verification, two u-PA inhibitory activity polypeptides PEVMGVSK and HIQKEDVPSE derived from bovine milk casein are obtained. The two polypeptides can be stably combined with the u-PA active site through multiple intermolecular forces, have a significant inhibitory effect on u-PA-mediated plasminogen activation, can effectively improve the storage period stability of ultra-high temperature instant sterilized milk, delay protein hydrolysis and aging gel formation, and can inhibit the plasmin clot lysis and MDA-MB-231 human breast cancer cell migration in a concentration-dependent manner. The polypeptides obtained by the application have application potential and practical value in the fields of dairy product quality improvement, hemostatic drugs and anti-cancer drug research, etc. as natural source active ingredients.

This invention belongs to the field of biomedical nanomaterials technology, and provides a magnetic resonance / NIR-II fluorescence imaging dual-modal nanoprobe, its preparation method, and its application. The magnetic resonance / NIR-II fluorescence dual-modal imaging nanoprobe of this invention comprises amino- or thiol-modified mesoporous silica nanoparticles, an NIR-II fluorescent dye linked to the mesoporous silica nanoparticles, bovine serum albumin linked to the NIR-II fluorescent dye, and a gadolinium-based magnetic resonance contrast agent linked to the bovine serum albumin. This invention uses bovine serum albumin as a "molecular bridge," utilizing various intermolecular forces to stably and firmly bind the NIR-II fluorescent dye and gadolinium-based magnetic resonance contrast agent to the mesoporous silica nanoparticles, forming a highly stable and biocompatible MRI / NIR-II fluorescence dual-modal imaging nanoprobe. This improves the contrast agent loading rate and stability, and avoids the problem of contrast agent leakage during in vivo circulation.