A modified collagen fiber preparation method and application are provided. The modified collagen fiber is prepared by modifying a collagen fiber with a plant tannin; and a method of the preparation includes: mixing the plant tannin with the collagen fiber in a liquid environment with a pH of 5 to 8 to allow a reaction, and washing and drying a product. In the present disclosure, a plant tannin rich in phenolic hydroxyl can be combined with a collagen fiber in various ways such as multi-point hydrogen bonding and hydrophobic bonding, such that the plant tannin structure is introduced into a natural multi-layer micro/nano-structure of the collagen fiber; and due to a large number of phenolic hydroxyl structures in the plant tannin, the collagen fiber introduced with the plant tannin structure shows improved compatibility with a waterborne resin, and can produce strong hydrogen bonding with polar groups in the waterborne resin.

The present invention relates to a process for the treatment of thermoplastic polyurethane, to the treated thermoplastic polyurethane and to the use thereof.

A process for surface treatment of an object, including the following steps: dipping the object in a solution comprising a concentrated acid or a mixture of concentrated acids, and having a pH of between 0 and 2, in order to impregnate the surface of the object, removing the object from the acid solution, heating the object at a temperature of between 140° C. and 180° C., until melting of the surface is obtained, and cooling the object. The process according to the presently disclosed embodiment applies in particular, but not exclusively, to objects resulting from additive manufacture techniques.

A process for surface treatment of an object, including the following steps: dipping the object in a solution comprising a concentrated acid or a mixture of concentrated acids, and having a pH of between 0 and 2, in order to impregnate the surface of the object, removing the object from the acid solution, heating the object at a temperature of between 140° C. and 180° C., until melting of the surface is obtained, and cooling the object. The process according to the presently disclosed embodiment applies in particular, but not exclusively, to objects resulting from additive manufacture techniques.

Disclosed is a method for preparing a three-layer-co-extruded diaphragm of a lithium-ion battery, falling into lithium-ion battery diaphragm technical field. The annealing box used comprises: box body, motor and sealing over, with uniformly-arranged heating plates fixedly connected to inner surface of the box body, a driving shaft arranged horizontally within the box body in front-back direction, a first and second driven shafts arranged on the left and right sides of the driving shaft correspondingly within the box body, an interlayer film coiling connected between the driving shaft and the first driven shaft within the box body horizontally; a diaphragm coiling connected between the driving shaft and the second driven shaft within the box body slantwise. Controllable annealing temperature and insulation from external environment avoid influence of external environment on diaphragm and ensure uniform heating of diaphragm. It produces a diaphragm of stable quality and is convenient to be mass-produced.

An article including at least one polymer, the at least one polymer including a silicone elastomer, a thermoplastic elastomer, or combination thereof, wherein the article has an outer surface treated to provide at least silicon moieties, silicon-oxide moieties, silica-like moieties, organosilicon moieties, hydroxyl moieties, hydrocarbon moieties, or combination thereof, wherein the outer surface has a tack decrease of at least 50% compared to a non-treated outer surface.

Nanoporous composite separators are disclosed for use in batteries and capacitors comprising a nanoporous inorganic material and an organic polymer material. The inorganic material may comprise Al.sub.2O.sub.3, AlO(OH) or boehmite, AlN, BN, SiN, ZnO, ZrO.sub.2, SiO.sub.2, or combinations thereof. The nanoporous composite separator may have a porosity of between 35-50%. The average pore size of the nanoporous composite separator may be between 10-90 nm. The separator may be formed by coating a substrate with a dispersion including the inorganic material, organic material, and a solvent. Once dried, the coating may be removed from the substrate, thus forming the nanoporous composite separator. A nanoporous composite separator may provide increased thermal conductivity and dimensional stability at temperatures above 200° C. compared to polyolefin separators.

Nanoporous composite separators are disclosed for use in batteries and capacitors comprising a nanoporous inorganic material and an organic polymer material. The inorganic material may comprise Al.sub.2O.sub.3, AlO(OH) or boehmite, AlN, BN, SiN, ZnO, ZrO.sub.2, SiO.sub.2, or combinations thereof. The nanoporous composite separator may have a porosity of between 35-50%. The average pore size of the nanoporous composite separator may be between 10-90 nm. The separator may be formed by coating a substrate with a dispersion including the inorganic material, organic material, and a solvent. Once dried, the coating may be removed from the substrate, thus forming the nanoporous composite separator. A nanoporous composite separator may provide increased thermal conductivity and dimensional stability at temperatures above 200° C. compared to polyolefin separators.

The present invention provides methods, processes, and systems for the manufacture of three-dimensional articles made of polymers using 3D printing. A layer of prepolymer is deposited on a build plate to form a powder bed. The deposited powder bed is heated to about 50° C. to about 170° C. Then, a solution of activating agent is printed on the powder bed in a predetermined pattern, and a stimulus is applied converting the prepolymer to the final polymer. After a predetermined period of time, sequential layers are printed to provide the three-dimensional article. The three-dimensional object can be cured to produce the three-dimensional article composed of the final polymers.

Provided are a heat-resistant synthetic resin microporous film that has both good heat resistance and good mechanical strength and exhibits a suppressed decrease in mechanical strength over time, and a method for producing the heat-resistant synthetic resin microporous film. The heat-resistant synthetic resin microporous film of the present invention includes a synthetic resin microporous film, and a coating layer formed on at least part of the surface of the synthetic resin microporous film and containing a polymer of a polymerizable compound having two or more radically polymerizable functional groups per molecule. The maximum thermal shrinkage rate of the heat-resistant synthetic resin microporous film when heated from 25° C. to 180° C. at a temperature rising rate of 5° C./min is 15% or less. The piercing strength thereof is 0.6 N or more. The rate of retention of the piercing strength after heating at 70° C. for 168 hours is 85% or more.