A starch-containing microsphere has a particle size that exhibits polydispersity with uniform distribution in a particle size concentrated distribution interval. The particle size distribution in the particle size concentrated distribution interval has the following features: equal division of the particle size concentrated distribution interval into n intervals, and a microsphere percentage in each interval is formula (I),

[00001]$\begin{array}{cc}\frac{100}{n}\%\pm \frac{10}{n}\%,& \left(I\right)\end{array}$

where n is an integer greater than 1. The preparation method of the starch-containing microsphere includes: first reacting starch with a low concentration of epichlorohydrin, and then reacting the resultant product with a surfactant, followed by final crosslinking to give microspheres. The starch-containing microspheres thus prepared are polydisperse starch-containing microspheres with a uniform particle size distribution, with the particle size being in a range of 0.1-500 μm.

An object of the present invention is to provide a macromolecular material that exhibits excellent elongation. The first macromolecular material of the present invention contains the first polymer containing the first structural unit and the second polymer containing the second structural unit. The first structural unit has a guest group in its side chain, and the second structural unit has a host group in its side chain. At least one of the first and the second polymers contains at least one fluorine group. The second macromolecular material of the present invention contains the first structural unit having a guest group in its side chain, the second structural unit having a host group in its side chain, and the third structural unit other than the first and second structural units. At least one of the first, the second, and the third structural units contains at least one fluorine group.

An object of the present invention is to provide a macromolecular material that exhibits excellent elongation. The first macromolecular material of the present invention contains the first polymer containing the first structural unit and the second polymer containing the second structural unit. The first structural unit has a guest group in its side chain, and the second structural unit has a host group in its side chain. At least one of the first and the second polymers contains at least one fluorine group. The second macromolecular material of the present invention contains the first structural unit having a guest group in its side chain, the second structural unit having a host group in its side chain, and the third structural unit other than the first and second structural units. At least one of the first, the second, and the third structural units contains at least one fluorine group.

An object of the present invention is to provide a macromolecular material that exhibits excellent elongation. The first macromolecular material of the present invention contains the first polymer containing the first structural unit and the second polymer containing the second structural unit. The first structural unit has a guest group in its side chain, and the second structural unit has a host group in its side chain. At least one of the first and the second polymers contains at least one fluorine group. The second macromolecular material of the present invention contains the first structural unit having a guest group in its side chain, the second structural unit having a host group in its side chain, and the third structural unit other than the first and second structural units. At least one of the first, the second, and the third structural units contains at least one fluorine group.

This invention belongs to the technical field of composite materials, and discloses a xylan-based dual network nanocomposite hydrogel, preparation method thereof and use therefor. The method comprises (1) adding graphite oxide powder into deionized water, ultrasonically dispersing to obtain a GO aqueous dispersion; (2) adding xylan into deionized water, heating and stirring to obtain a xylan solution; (3) adding a water-soluble calcium salt, a reaction monomer and the xylan solution into the GO aqueous dispersion, and stirring and dispersing uniformly under an ice-bath condition, then adding an initiator, a crosslinking agent and an accelerator, stirring and mixing uniformly to obtain a mixed solution; and 4) drying and reacting the mixed solution (in the step (3) to obtain a xylan-based dual network nanocomposite hydrogel. The composite hydrogel obtained by this invention has high mechanical property, is biodegradable and biocompatible, and can be used in the field of biomedicine, such as tissue engineering, drug sustained release, cell culture scaffold and cartilage tissue, etc.

This invention includes a wettable biomedical device containing a high molecular weight hydrophilic polymer and a hydroxyl-functionalized silicone-containing monomer.

This invention includes a wettable biomedical device containing a high molecular weight hydrophilic polymer and a hydroxyl-functionalized silicone-containing monomer.

A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising: (a) from 90 mol-% to 99.9 mol-%, preferably 95 mol-% to 99.5 mol-% of repeating units according to Formula (1) ##STR00001## (b) from 0.01 mol-% to 10 mol-%, preferably to 5 mol-%, more preferably to 3 mol-% of crosslinking or branching units, wherein the crosslinking or branching units result from the incorporation of a monomer comprising at least two olefinically unsaturated double bonds;
wherein components (i) and (ii) are polymerized by radical precipitation polymerization in a polar solvent.

A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising: (a) from 90 mol-% to 99.9 mol-%, preferably 95 mol-% to 99.5 mol-% of repeating units according to Formula (1) ##STR00001## (b) from 0.01 mol-% to 10 mol-%, preferably to 5 mol-%, more preferably to 3 mol-% of crosslinking or branching units, wherein the crosslinking or branching units result from the incorporation of a monomer comprising at least two olefinically unsaturated double bonds;
wherein components (i) and (ii) are polymerized by radical precipitation polymerization in a polar solvent.

A water-soluble and/or water-swellable hybrid polymer comprising: (i) from 5 wt.-% to 95 wt.-% water-soluble and/or water-swellable polysaccharide polymer; (ii) from 5 wt.-% to 95 wt.-% synthetic polymer comprising: (a) from 90 mol-% to 99.9 mol-%, preferably 95 mol-% to 99.5 mol-% of repeating units according to Formula (1) ##STR00001## (b) from 0.01 mol-% to 10 mol-%, preferably to 5 mol-%, more preferably to 3 mol-% of crosslinking or branching units, wherein the crosslinking or branching units result from the incorporation of a monomer comprising at least two olefinically unsaturated double bonds;
wherein components (i) and (ii) are polymerized by radical precipitation polymerization in a polar solvent.