6results about How to "Good temperature response" patented technology

The invention belongs to the field of functional materials and medical dressing materials, and relates to a preparation method of a hydrogel-based wound dressing material with temperature responsiveness. The preparation method comprises the following steps: firstly, polymerizing 1-vinyl-3-butylimidazolium bromide ([VBIM < + >] Br <->) onto a double-network structure of polyacrylic acid (PAA) and polyacrylamide (PAM) through an ultrasonic method, and introducing carboxymethyl cellulose (CMC) at the same time; and pouring the obtained hydrogel precursor liquid into a mold, heating to synthesize a pregel, and soaking the pregel in a phosphate buffer solution containing drugs to obtain the PVMAC hydrogel with temperature responsiveness. Under the optimal condition, the conversion temperature can be controlled at 37 DEG C. In addition, the hydrogel has excellent mechanical properties and good antibacterial and biocompatibility, which provides conditions for the hydrogel as a temperature-responsive hydrogel-based wound dressing. The hydrogel-based dressing material disclosed by the invention has important meanings on rapid healing of wounds, relieving of pains of patients and real-time monitoring of wound treatment.

The application discloses a biomass gelatinous gel and a preparation method and application thereof, and the method comprises the following steps: dispersing anthraquinone small molecules and porous graphene in a sodium bicarbonate solution or a phosphate buffer solution to obtain a mixture; the mass ratio of the anthraquinone small molecules to the porous graphene is 1:0.14-7; the pH value of the mixture is 8-10; and the mixture is cooled after being ultrasonically treated at 30-70 DEG C to obtain the biomass gelatinous gel. The biomass gelatinous gel is prepared by self-assembly of anthraquinone small molecules and lignin-based porous graphene as main raw materials in a weak alkaline system through non-covalent interaction between molecules. The biomass gel is a room-temperature gelatinous gel, has good temperature responsiveness, and has excellent specific capacity, remarkable shear thinning characteristics, large shear strain, self-healing characteristics, non-frequency dependence and time stability through tests.

The invention provides a Semi-IPN type and Full-IPN type temperature / pH dual response intelligent hydrogel as well as a preparation method and application thereof, and belongs to the field of response materials. The preparation method comprises the following steps: dissolving N-isopropylacrylamide, N-hydroxymethyl acrylamide and N, N '-methylene bisacrylamide in distilled water together, and stirring in a cold bath in a nitrogen atmosphere to obtain a mixed solution A; adding carboxymethyl chitosan into the mixed solution A, uniformly mixing, adding an initiator ammonium persulfate, uniformly stirring, adding a tetramethylethylenediamine solution, uniformly stirring, transferring into a container, and reacting to obtain the Semi-IPN temperature / pH dual-response intelligent hydrogel; dialyzing, soaking in a genipin aqueous solution, and dialyzing, so as to obtain the Full-IPN temperature / pH dual-response intelligent hydrogel. The obtained IPN type temperature / pH dual response intelligent hydrogel is good in biocompatibility, has temperature and pH dual response, and has potential application prospects in the fields of wound dressing, drug delivery, tissue engineering and the like.

This utility model discloses a portable brain-computer interface device, relating to the field of brain-computer interface technology. It includes a main body, with a support component fixedly mounted on the lower surface of the main body for easy carrying. A fixing strap is provided below the support component to secure the device to the head. The support component includes two support rings, with the upper surface of the upper support ring fixedly mounted to the lower surface of the main body. The support ring includes a shell that disperses impact energy and protects the head. This portable brain-computer interface device, through the composite use of a shell, outer layer, inner lining, non-woven lining, and memory foam, effectively improves the wearing comfort and safety of the support ring. Furthermore, the support component, composed of two support rings and with through holes, minimizes the weight of the device, enhancing comfort and making it convenient for carrying when out and about.

The present invention belongs to the field of intelligent responsive materials, and relates to a thermosensitive cyclodextrin and a preparation method thereof. Functionalized amino acids are grafted onto natural cyclodextrin or modified cyclodextrin, and the reaction temperature, reaction time and reactant concentration are controlled to prepare thermosensitive natural cyclodextrin and modified cyclodextrin with different lower critical solution temperatures (LCST). The preparation process of the present invention is simple and feasible, and the preparation efficiency is high. The prepared thermosensitive cyclodextrin exhibits excellent temperature responsiveness. Such materials will have important application value in drug delivery, intelligent biomaterials, separation and purification, etc.

The invention discloses a preparation method of a suspending agent and application of the suspending agent in magnesium oxide modified cement, a foaming agent and water are mixed, magnesium sulfate is added into the mixed solution, and the suspending agent is obtained after the solution is fully fused by stirring. The prepared suspending agent has excellent temperature response performance, conversion between a suspended state and a gel state can be achieved through simple heating or cooling operation, and great convenience is brought to accurate regulation and control of the material state in practical application; a highly dispersed state of insoluble solid particles in water can be maintained at normal temperature, agglomeration and rapid precipitation of the particles are effectively prevented, and it is ensured that suspension liquid keeps uniformity and stability for a long time; in the application in the field of cement modification, magnesium oxide can be highly uniformly distributed in a cement matrix, the basic performance of cement is kept stable, the mass of the cement is remarkably reduced, the consumption cost of raw materials is directly reduced, and excellent heat insulation performance is shown.