The invention discloses an acrylic acid cyclodextrin polymer represented in a structure formula (I) and a preparation method thereof. In the preparation method, in the presence of an oxidation-reduction system initiator of ammonium persulfate-sodium hydrogensulfite, bulk polymerization and suspension polymerization are carried out on maleic anhydride beta- cyclodextrin and acrylic acid in a water and cyclohexane system to respectively obtain a cyclodextrin polymer which is hydrogel sensitive to pH, wherein the synthesis reaction conditions are mild and simple and easy to control. An adsorption experiment result shows that after a dye solution is subjected to adsorption, the absorbance is obviously reduced, and the invention is particularly suitable for basic dye wastewater treatment.

Application of acrylic acid cyclodextrin polymer in dyeing industrial waste water treatment

An intermetallic magnetic compound of iron oxide and palladium with a nanometer particle size is disclosed, together with a method of making magnetic nanoparticles that include an intermetallic bond between palladium and iron-oxide. Additionally, a method is disclosed of catalyzing an organic reaction by contacting the organic reagents with an intermetallic magnetic compound of iron oxide and palladium that has nanometer particle size in an amount sufficient to catalyze the organic reaction.

Synthesis and Use of Intermetallic Iron Palladium Nanoparticle Compositions

The invention discloses a preparation method of a three-dimensional radiochromic gel dosimeter. The preparation method has the following steps: comprising a radiochromic system and a tissue equivalent gel carrier system; using a vesicle made from diacetylene compounds as the radiochromic system; preparing a gel carrier with tissue equivalent organic polymer materials; and preparing the nanometer vesicle made from the diacetylene compounds by adopting an injection method or a thin film method, and preparing the radiochromic gel dosimeter by adopting a chemical crosslinking method, a repetitive freezing method or a condensation method. Each infinitesimal substance of the gel can have relevant color changes according to different adsorbed doses, and the general three-dimensional dose distribution can be judged in a visual manner. After the doses of the gel are calibrated, the three-dimensional dose distribution can be determined by scanning and measuring the absorbance. The preparation method effectively overcomes the problems of diffusing effect, radiation late effect and low forming ability for the existing gel dosimeter, and exactly measures the three-dimensional dose distribution of a dose field with a steep dose distribution. The preparation method has the advantages of simple preparation, convenient analysis, high sensitivity and stable performance, and is available for popularization and usage.

Preparation method of three-dimensional radiochromic gel dosimeter

Method for preparing bacterial cellulose loaded nanometer palladium catalyst

A stable transdermal adhesive composition comprising: an adhesive comprising a washed polymerization reaction product of at least two ethylenically unsaturated monomers; and at least one pharmaceutically active compound which is susceptible to oxidative degradation; wherein the at least two ethylenically unsaturated monomers, if present in the adhesive as unreacted monomers, are present at a level of less than 200 ppm of total unreacted monomer, based upon the total weight of the adhesive, methods of making the composition, a transdermal drug delivery device using the composition, methods of making the device, and methods of delivery the pharmaceutically active compound are provided.

Transdermal adhesive compositions, devices and methods

The invention relates to a method for making copolymer hydrogel containing cyclodextrin structure by means of electron beam irradiation. The method comprises the following concrete steps that: firstly, maleic anhydride is used to carry out the modification of beta-cyclodextrin; then, the obtained MAH-beta-CD and acrylic acid (AAc) are dissolved in deionized water so as to be made into an MAH-beta-CD/ AAc mixed solution which undergoes electron beam irradiation with the irradiation dose of between 80 and 300 KGy; the irradiated sample is dipped in deionized water for 24 hours, and the water is changed for a plurality of times during the irradiation so as to remove unreacted monomer and homopolymer; finally, detergent sample undergoes vacuum drying till the sample reaches to a constant weight, and the obtained dried gel is the copolymer hydrogel containing cyclodextrin structure by means of electron beam irradiation. The product made by the method has both molecular inclusion capacity and environmental responsivity, and is a more ideal carrier material of inclusion anticarcinogen and drug controlled release.

Method for preparing copolymer aquagel having cyclodextrin structure by electron beam radiation

The invention discloses a making method of chitosan magnet-microball metal palladium complex catalyst, which comprises the following steps: (1) weighing certain quantity of ferric chloride solution through original reducing method; adding certain quantity of sodium sulfite solution; stirring protected by nitrogen; adding sodium hydroxide to react for 1-2h; adding acetic acid solution of chitose; stirring at high speed to finish reacting; obtaining black chitosan magnet-microball; (2) weighing quantitative chitosan magnet-microball in the flask; adding metal palladium salt and anhydrous alcohol; stirring; heating; refluxing to react 10h under 90-120 deg.c; washing through anhydrous alcohol; sucking; drying; obtaining the product.

Method for preparing chitose magnetic microsphere metal palladium complex catalyst

The invention relates to a novel radiation discoloration hydrogel three-dimension dose meter and a preparation method thereof, wherein the hydrogel three-dimension dose meter is formed by mixing a polyvinyl alcohol PVA acid water solution and dose meter gel beads in a mass ratio of 20: (1-3). The invention utilizes freeze and thaw physical crosslink method to prepare the hydrogel dose meter, which has simple operation and has no pollution or toxic side effect, compared with chemical crosslink method. Under radiation, the Fe2+ of the hydrogel three-dimension dose meter is oxidized into Fe3+, and fits the xylenol orange (X0) to form a color development XO-Fe3+ complex, thereby obtaining significant color gradient change to visually observe the distribution of the radiation dose. The invention utilizes liquid nitrogen quickly freeze to prepare and disperse dose meter gel beads in a PVA substrate, thereby simulating cell independence in a certain degree, to improve the dose response sensitivity and the stability after radiation.

Liming Yang

Papers

Method for preparing copolymer aquagel having cyclodextrin structure by electron beam radiation

Method for preparing chitose magnetic microsphere metal palladium complex catalyst

Radiating color changing hydrogels three-dimensional monitor and method for making same