64results about How to "Promotes microphase separation" patented technology

An underlayer is formed to cover the upper surface of a substrate and a guide pattern is formed on the underlayer. A DSA film constituted by two types of polymers is formed in a region on the underlayer where the guide pattern is not formed. Thermal processing is performed while a solvent is supplied to the DSA film on the substrate. Thus, a microphase separation of the DSA film occurs. As a result, patterns made of the one polymer and patterns made of another polymer are formed. Exposure processing and development processing are performed in this order on the DSA film after the microphase separation such that the patterns made of another polymer are removed.

The invention discloses a fluorine-containing polyurethane and a preparation method thereof. Addition polymerization reaction of fluorine-containing alkyl polyether diol and diisocyanate, catalyzed by tin catalyst, chain extension by chain extender, adding aminosilane coupling agent to end capping, to prepare a fluorine-containing polyurethane; the product has Fluorine-containing polyether block, high fluorine content, the fluoroalkyl group located in the polyether side group is prone to microphase separation and surface migration, low surface energy of polyurethane, fluorine-containing polyurethane is terminated with silane coupling agent, easy to store and easy to cure . The coating prepared by the fluorine-containing polyurethane of the present invention has a water contact angle higher than 110° and excellent water repellency.

The invention relates to a nano composite soy protein plastic and a preparation method thereof. The nano composite soy protein plastic is prepared by the following steps: with soy isolate protein as a base material, dialdehyde polysaccharide with the aldehyde content of 5%-80% as a cross-linking agent, and amino nano clay as a nano filler, adding a plasticizer which is 10%-30% of dry weight of the soy isolate protein and a certain amount of deionized water; carrying out hot-pressing by using a hot press at 80-140 DEG C and 5-50MPa for 3-30 minutes. The nano composite soy protein plastic prepared by the method has relatively high water resistance, mechanical property and heat stability, is an environment-degradable high-strength protein plastic, and has a wide application prospect in the fields such as biological materials, foods and medicine packaging.

The invention discloses a piperidine-type anion-exchange membrane used in an alkaline electrolytic cell and a preparation method thereof, belonging to the technical field of alkaline anion-exchange membranes. The invention firstly synthesizes piperidine-type three-monomer polymers with different degrees of substitution, and then directly uses the piperidone of the polymer as a grafting site to quaternize the polymer to obtain a membrane material and form a membrane. The prepared membrane has good alkali stability and mechanical strength, and can be applied in alkaline electrolytic cells.

The invention discloses a pH-sensitive biodegradable polyurethane-urea material and a preparation method thereof. The polyurethane-urea is pH-sensitive biodegradable polyurethane-urea prepared by mixing dihydroxy-terminal polyether ester with N,N-bis(2-ethoxy) 4-pyridinccarbox amide, carrying out chain expansion by using carbamido-containing diisocyanate and purifying; the polyether ester is usedas a main soft segment, a chain segment containing carbamido and urethane group is used as a hard segment and a pyridine ring is positioned on a side chain. The polyurethane-urea has the characteristics of biodegradability, absorbability of a degradation product, pH sensitivity, high expanding and degrading rate in acidic mediums, as well as basically no expansion and low degrading rate in neutraland alkaline mediums; in addition, the pH sensitivity is not basically affected by temperature and can be applied to the field of controlled release as a drug carrier, and further the drug release rate is controlled according to pH values of different parts of an organism. The hard segment formed by carbamido-containing structure diisocyanate contains dense hydrogen bonds, so that the mechanicalproperty of the material is improved.