356results about "Alginic acid coatings" patented technology

The invention belongs to the technical field of preparation of self-repairing coatings, and relates to a method for preparing a polyelectrolyte coating having self-repairing capability based on a layer-by-layer assembly technology. The prepared polyelectrolyte coating has high strength in the air and high mobility when the coating is immersed in water or the water is sprayed on the coating, so huge scratches caused by mechanical damage on the coating can be spontaneously repaired. The self-repairing polyelectrolyte coating has the advantages that: a repair means is easy to implement, the sameposition can be repeatedly and spontaneously repaired, and the preparation of the coating is free from the limitation of a substrate. Moreover, the method for preparing the self-repairing polyelectrolyte coating is simple, and the used raw materials are non-toxic and harmless. The method for preparing the self-repairing coating is believed to contribute to research of aspects comprising material science, surface chemistry, polymer science and the like, and the self-repairing polyelectrolyte coating is expected to be widely applied in aspects of preparation of protective coatings, biological material coatings, display equipment and the like.

The invention relates to compositions for coating of printing paper, said compositions comprising microfibrillated cellulose (MFC) and one or more polysaccharide hydrocolloids, and use of said compositions. Further, the invention relates to coated paper, comprising a first layer of polysaccharide hydrocolloid(s) and a second layer of MFC, and use of said paper. A method for reducing the linting and/or dusting of a paper is also disclosed.

The invention discloses a polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and a preparation method thereof. The preparation method comprises following steps of: 1), preprocessing: putting and soaking base material into an acid solution and cleaning and drying base material with water; 2), self-assembly: putting and soaking pre-processed base material to a cationic polyelectrolyte solution in order to from a layer of ion membrane, taking out the layer of ion membrane and cleaning the ion membrane with water for drying, putting and soaking the ion membrane into the cationic polyelectrolyte solution in order to form an layer of anionic membrane, and cleaning the layer of anionic membrane with water and drying; sequentially repeating above self-assembly process for multiple times so that the polyelectrolyte nanometer flame-retardant coating is prepared by adoption of layer-by-layer assembly on the surface of the base material. The polyelectrolyte nanometer flame-retardant coating by adoption of layer-by-layer assembly and the preparation method thereof have following beneficial effects: the polyelectrolyte nanometer flame-retardant coating is green and eco-friendly and has a simple and feasible preparation method; damage to the internal structure of base material is avoided; high flame-retardant efficiency is obtained; and the preparation method is suitable for formation of flame-retardant coatings on material surfaces including fabric, wood, foam and plastics.

The present invention relates to a barrier layer and a packaging laminate comprising a barrier layer and a method to produce a barrier layer. The barrier layer is manufactured of a cellulose-based hydrolysate. The barrier layer comprises lignin and oligo- or poly-saccharides, where the lignin and oligo- or polysaccharides are at least partly covalently bonded to each other in a matrix, and at least one co-component. The co-component is bonded to the lignin and oligo- or polysaccharides by means of primary and/or secondary bonds. In addition, the invention relates to a package made of the packaging laminate.

The present invention concerns multilayer films comprising a plurality of layers, at least some of the layers comprise (i) cross-linked chitosan, alginate, chondroitin sulfate, or hyaluronic acid and (ii) particles or void spaces; wherein the layers are 20-260 nm in thickness. Also disclosed are multilayer films comprising at least two of: a layer comprising a first polymer; a layer comprising a second polymer; a layer comprising particles, wherein said particles comprise ceramic material, metallic species, or both; and, a layer comprising a combination of said first polymer and said particles; wherein said multilayer film is capable of displaying structural color. Also provided are methods for making and using the inventive multilayer films and compositions comprising the multilayer films.

Transfer paper suitable for inkjet printing, provided, at least on the side to be printed, with a release or barrier layer, the layer having a porosity of at most 100 ml/min, and a method for manufacturing a transfer paper and a method for printing transfer paper with an inkjet printer with an aqueous dispersion of a sublimable ink.

Provided is an agent for dispersing an electrically conductive carbon material, in which the agent consists of a polymer which has an oxazoline group in a side chain and which is obtained by using an oxazoline group-containing monomer such as that represented by formula (1) for example, and in which the agent exhibits excellent dispersion of an electrically conductive carbon material and produces a thin film that exhibits excellent adhesion to a current collection substrate when formed into a thin film together with the electrically conductive carbon material.

(In the formula, X denotes a polymerizable carbon-carbon double bond-containing group, and R¹-R⁴ each independently denote a hydrogen atom, a halogen atom, an alkyl group optionally having a branched structure having 1-5 carbon atoms, an aryl group having 6-20 carbon atoms, or an aralkyl group having 7-20 carbon atoms.)

An edible, hardenable coating composition is disclosed which comprises high levels of low viscosity propylene glycol alginate and a surfactant, which may additionally contain a filler, a pigment, and optionally a small amount of a secondary film former and/or a strengthening polymer. The coating composition of the present invention may be applied to pharmaceutical and veterinary solid dosage forms, confectionery, seeds, animal feed, fertilizers, pesticide tablets, and foods and provides an elegant prompt release coating which does not retard the release of active ingredients from the coated substrate.

A water-based coating formulation for an electrode plate of an electricity storage device, said water-based coating formulation being adapted to form a coating film layer on the electrode plate, contains at least one resin binder having a saponification degree of 40% or higher and selected from unmodified and modified polyvinyl alcohols and unmodified and modified ethylene-vinyl alcohol copolymers, a conductive material, and a specific polybasic acid or its acid anhydride in a water-based medium containing water as a polar solvent. Per parts by mass of the conductive material (2), the resin binder is from 0.1 to 3 parts by mass and the polybasic acid or the like is from 0.01 to 6 parts by mass. The coating formulation has a solids content of from 0.02 mass % to 40 mass %.

The invention provides a type of marine organism shell powder paint, mainly comprising biosynthesis adhesive, sodium hexametaphosphate, shell powder, emulsifier, and citric acid mono. The marine organism shell powder paint is purely natural, environment-friendly, of simple preparation and of low manufacturing cost, and has no toxic effects on human body.

Provided is an aqueous liquid composition including a water-based medium containing water, a polymer having at least one type of groups selected from hydroxyl groups and amino groups, and phosphonobutanetricarboxylic acid. The polymer is at least one polymer selected from the group consisting of a polysaccharide, polyamino acid, polyvinyl alcohol, polyallylamine, polyvinylamine, a polyamidine, a polyethylenimine, and their derivatives.

An edible, hardenable coating composition is disclosed which comprises high levels of low viscosity propylene glycol alginate and a surfactant, which may additionally contain a filler, a pigment, and optionally a small amount of a secondary film former and/or a strengthening polymer. The coating composition of the present invention may be applied to pharmaceutical and veterinary solid dosage forms, confectionery, seeds, animal feed, fertilizers, pesticide tablets, and foods and provides an elegant prompt release coating which does not retard the release of active ingredients from the coated substrate.

The invention discloses an oleophobic coating material, an oil-water separation functional material, a preparation method thereof and use thereof. The oleophobic coating material includes a crosslinked network structure formed by intermolecular interaction of two or more ionic compounds, and wherein at least two ionic compounds carry opposite charges. The oil-water separation functional material comprises a porous substrate and the oleophobic coating material, and the oleophobic coating material is distributed at least on a surface of the substrate and a through-hole wall. The oleophobic coating material and the oil-water separation functional material of the invention have the characteristics of super hydrophilicity, underwater super oleophobicity and low oil adhesion, and have stable performance in acid and alkali and various salt solution environments, and can be applied to the fields of the anti-oil contaminated surface, the self-cleaning surface, oil/water separation, oil-water emulsion demulsification and the like.

A seed or seedling is coated with underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, polyethylene glycol), polyethyleneoxide, poly(vinyl alcohol), polyglycerol, polytetrahydrofuran, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize, sorghum, waxy sorghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose, the coated seed or seedling having a shelf-life at room temperature in ambient conditions in an unsealed container to at least two months.

A coating composition comprising sodium alginate and plasticizer, optionally detackifying agents, opacifers and colorants. The coating composition of the present invention may be applied to a pharmaceutical and veterinary tablet, caplets, pellets, granules, neutraceuticals, food, confectionery, seeds, animal feed, fertilizers and pesticide tablets and provides an elegant, glossy, prompt release coating which does not retard the release of active ingredients from the coated substrate.

A suspendible enteric coating composition for encasing orally ingestible articles wherein the enteric coating composition comprises a pH-dependent polymer selected from a group containing alginates and alginic acids, a pH-independent water insoluble polymer selected from the group comprising ethylcellulose and ethylcellulose-containing compositions, and a plasticizer selected from the group containing triethyl citrate, glycerin, propylene glycol, triacetin, acetylated monoglycerides, dibutyl sebacate, polyethylene glycols, sorbitals, middle chain triglycerides and combinations thereof. A three step method for providing a stable outer enteric coating on an ingestable item comprising a first step of encasing the item with a suspension comprising a mixture of at least a sugar and a microcrystalline cellulose, a second step of then encasing the item with a suspension comprising a mixture of a film-forming polymer and a plasticizer, and a third step of finally encasing the item with the enteric coating composition.

The invention discloses a complex aqueous solution for preparing a self-repairing anti-fog frost prevention coating and application thereof and belongs to the technical field of chemical coatings. The complex aqueous solution is prepared from, by mass, 2-20% of water absorbent, 1-10% of stabilizer, 0-8% of flexibilizer and 0-10% of adhesive. After the four substances of the water absorbent, the stabilizer, the flexibilizer and the adhesive are dissolved in water and are fully mixed, and the complex aqueous solution for preparing the self-repairing anti-fog frost prevention coating is obtained. By the usage of modes of spraying, scraping coating or lifting to form a coating, coatings are formed in the surfaces of glass, spectacle glasses, polyethylene terephthalate and the like, and therefore the requirements for the anti-fog and frost prevention functions of different materials are met. There are multiple hydrogen bonds or an electrostatic crosslinking network inside the self-repairing anti-fog frost prevention coating, and therefore the self-repairing anti-fog frost prevention coating has excellent stability in water. Hydrogen bonds among all components or electrostatic interaction has certain dynamics, and the coating has an excellent repair capacity. The anti-fog frost prevention coating has a multiple damage repair capacity, and therefore self transparency and anti-fog and frost prevention properties are maintained.

The invention discloses a method for preparing a cement concrete pavement curing agent, and belongs to the technical field of curing agent preparation. The method is as follows: first, cleaning rice husks with an acid, removing impurities, drying, carbonizing under oxygen free conditions, calcining in a muffle furnace to obtain rice husk ash, using ethylene glycol as a grinding aid, adding silane coupling agent for modifying the rice husk ash in ball milling process, using methyl methacrylate as a monomer, sodium dodecylbenzene sulfonate and the like as emulsifiers, and ammonium persulfate as an initiator for preparation of acrylic emulsion, and compoudding the acrylic emulsion and the modified rice husk ash for preparation of the cement concrete pavement curing agent. In the process of using, a film can be fast formed by the acrylic emulsion on a concrete pavement for preventing water overflow, the modified rice husk ash can penetrate into concrete cracks for reacting with free calcium oxide and hydration product calcium hydroxide in cement for formation of crystals so as to block capillary pores on the surface of the cement to prevent water loss, and the problem that traditional curing agents cannot effectively improve the performance of the concrete can be effectively solved.

The invention belongs to the technical field of functional polymer film materials, and relates to preparation and application methods of a flexible composite film with a sterilization function. The flexible composite film is prepared by adopting an electrostatic self-assembly technology. The method comprises the steps of firstly preparing a flexible polydimethylsiloxane film; preparing silver nanoparticles by using silver mirror reaction in the flexible film; and adsorbing a polyelectrolyte layer and a fluorescent conjugated polyelectrolyte for sterilization. The flexible composite film has the beneficial effects that the preparation process is simple and convenient, no complicated equipment is needed, the ability of the fluorescent conjugated polyelectrolyte for generating reactive oxygen species is strengthened by the surface plasma effect of the silver nanoparticles in the film; and the film has very good sterilization ability and has good flexibility, and has a good application prospect in the field of food safety and medical hygiene, etc.

The invention provides a graphene heat conductive coating modified radiator, comprising a heat dissipation base and a heat dissipation fin. An outer surface of the heat dissipation fin is sprayed witha graphene coating, and the composition of the graphene coating comprises graphene oxide, solvent, dispersant, adhesive, thickener, composite conductive agent, carbon fiber filler, hydrophobic fillerand low surface energy organic matter. The graphene heat conductive coating modified radiator provided by the invention has excellent thermal conductivity by coating the heat dissipation fin thereofwith the modified graphene heat conductive coating, and at the same time, the heat conductivity, wear resistance, hydrophobicity and corrosion resistance of the graphene heat conductive coating are enhanced by adding carbon fiber filler, hydrophobic filler to the graphene heat conductive coating, enables the radiator to be used in a water heater or other equipment, and is less prone to corrosion when exposed to a medium for a long time.

CXCL12 polypeptide eluting matrices encapsulating at least one cell are described for use in the treatment of autoimmune disorders.

The invention relates to polyelectrolyte multilayer coatings and, methods for their preparation and application to substrates to enhance the bioactivity and corrosion protection of the substrates' surface. The invention is particularly suitable for coating substrates employed for medical applications, such as but not limited to medical implant devices for drug and/or biologics delivery in a patient. The substrate has a positive or negative charge. The polyelectrolyte multilayer coatings include at least a first polymer layer and a second polymer layer. The first polymer and second polymer have opposite charges. Each of the polymer layers is individually applied using a layer-by-layer such that an alternating charge multilayer coating is formed.