34results about How to "Strong molecular weight" patented technology

The invention relates to strong-hydrophobic porous carbon nanofiber and a preparation method thereof, and belongs to the technical field of porous carbon fiber. The preparation method comprises the following steps: adding thermosetting phenol resin and high molecular weight linear polymers into organic solvent with two proportions to be mixed until the thermosetting phenol resin and the high molecular weight linear polymers are fully dissolved, performing electrostatic spinning on the solution to form phenolic resin fiber, and carrying out curing and carbonizing to obtain the hydrophobic porous carbon nanofiber. The porous carbon nanofiber and the preparation method have the advantages as follows: the diameter, the pore structure and the hydrophobicity of the fiber can be adjusted and controlled through the change of the proportions of the solvent, the prepared carbon nanofiber has good flexibility, a developed pore structure and strong hydrophobicity, and is more conductive to practical application.

The invention discloses a gaseous-phase in-situ polymerization method for preparing an ultra-high molecular weight polyethylene graphene composite material. The method comprises the following steps of: reacting graphene which serves as a catalyst carrier with a transition metal compound to prepare a solid catalyst under a certain conditions, and reacting to prepare the ultra-high molecular weight polyethylene graphene composite material under the gaseous-phase conditions without a diluent. Graphene serves as the catalyst carrier and a reinforcing filler and is reacted under the gaseous-phase conditions, so that the polymerization activity can be improved through catalyst loading; and graphene in the composite material is uniformly dispersed, so that the composite material has excellent performance and particularly high impact resistance, and the problems that the traditional composite material is subjected to brittle rupture and is ineffective in long-term use process are solved.

The invention discloses an anti-human serum albumin single-chain antibody and a method for connecting polypeptide medicine with the nitrogen terminal of the antibody. A VL chain region has a complementary identification region (CDR) which has the following amino acid sequences of CDRs: N-SEQ-08 of CDR1, N-SEQ-09 of CDR2 and N-SEQ-010 of CDR3; a VH chain region has a complementary identification region which has the following amino acid sequences of CDRs: N-SEQ-05 of CDR1, N-SEQ-06 of CDR2 and N-SEQ-07 of CDR3; the VH chain takes the amino acid sequence shown as N-SEQ-02 as an expression form; the VH chain takes the amino acid sequence shown as N-SEQ-04 as an expression form; and the VH chain region and the VL chain region are connected through a protein hinge shown as N-SEQ-01 or N-SEQ-03. The single-chain antibody has small molecular weight, strong specificity, weak immunogenicity and high water solubility and is easily produced on a large scale in a fermentation mode. The invention also discloses a composition prepared from the single-chain antibody; and the medicine can effectively prolong the half-life period of polypeptide biological medicines.

The invention provides a high-temperature-resistant abrasion-resistant non-stick pan coating, a preparation method and a non-stick pan with the same. Nickel plating is conducted on the surface of a metal pan base body through the electrochemical method. Under the action of a magnetic field, a formed surface nickel layer is uniform and flat, and accordingly it is guaranteed that the subsequent coating is flat and uniform. Secondly, an annular structure in a poly(aryl ether nitrile ketone) molecular main chain makes the coating have good high temperature resistance, a molecular structure contains strong-polarity groups, namely nitrile groups, and the nitrile groups generate strong action force on the surface of a metal base material. Thirdly, under the action of irradiation, a silane coupling agent KH792 and poly(aryl ether nitrile ketone) have grafting reaction, and heat resistance is further improved, so that organic solvent molecules cannot permeate into the metal base material, stability is improved, the organic solvent molecules and the surface of the metal base material are connected in a strong chemical bond mode, and adhesion of the coating is greatly improved. Accordingly, the high-temperature-resistant anti-wear non-stick pan coating prepared through the method does not contain fluorine and is resistant to high temperature, abrasion and scratching.

The invention discloses low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate and a preparation method thereof. The low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate has a structural formula as shown in the specification. The degree of functionality of the low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate is 6-9, the viscosity is 300-2000mPa.s, and the molecular weight is 750-2500, so that the low-viscosity high-reactivity low-volume-contraction modified dipentaerythritol acrylate has very high reactivity, lower viscosity, high molecular weight, low migration, high curing efficiency, low volume contraction rate, good adhesive force and adjustable flexibility, and a prepared coating is good in impact resistance and strong in adhesive force; and the preparation method disclosed by the invention is simple and easy to control, and an obtained product is high in purity and good in performance.

The invention discloses low-viscosity high-reactivity low-volume-shrinkage modified pentaerythritol acrylate and a preparation method thereof. The low-viscosity high-reactivity low-volume-shrinkage modified pentaerythritol acrylate has a structural formula as shown in the specification. The functionality of the low-viscosity high-reactivity low-volume-shrinkage modified pentaerythritol acrylate is 4-6, the viscosity is 40-70mPa.s, and the molecular weight is 750-2500, so that the low-viscosity high-reactivity low-volume-shrinkage modified pentaerythritol acrylate is very high in reactivity, low in viscosity, high in molecular weight, low in migration, high in curing efficiency, low in volume shrinkage ratio, good in adhesive force and adjustable in flexibility, and a prepared paint is good in impact resistance and strong in adhesive force. The preparation method disclosed by the invention is simple and easy to control, and the obtained product is high in purity and good in performance.