Patents by Inventor Yanzhi XIA

Yanzhi XIA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12366012
    Abstract: An alginate fiber and a preparation method thereof are provided. The preparation method of the alginate fiber includes: S10: preparing a spinning solution with a raw material including sodium alginate; S20: extruding the spinning solution obtained in S10 into a solidification bath to allow solidification molding to obtain a primary fiber; S30: drawing and water-washing the primary fiber obtained in S20 to obtain an alginate fiber; and S40: soaking the alginate fiber obtained in S30 in a finishing agent to allow a post-treatment, where at least one of the raw material in S10, the solidification bath in S20, and the finishing agent in S30 includes a five-membered cyclic quaternary ammonium salt polymer. The alginate fiber obtained above has a high dye uptake, a small fiber strength loss, and a high soaping fastness.
    Type: Grant
    Filed: May 9, 2022
    Date of Patent: July 22, 2025
    Assignee: QINGDAO UNIVERSITY
    Inventors: Yanzhi Xia, Dagang Miao, Kai Li, Jiuyong Yao, Fangfang Cheng, Changhai Xu
  • Patent number: 12312707
    Abstract: Disclosed in the present invention are a preparation method for a graphene oxide fiber, and fiber obtained thereby. A polyelectrolyte is prepared into a spinning stock solution by means of a wet spinning method, graphene oxide is added in a coagulation tank to serve as a coagulation bath, the spinning stock solution is injected into the coagulation bath, a diffusion reaction is carried out, and winding, washing and drying are carried out to obtain the graphene oxide fiber; the preparation method has the advantages that equipment is simple, the costs are low, the spinnability is good, and the method is suitable for large-scale production; moreover, the prepared fiber has multiple layers of fiber walls; the fiber has good tensile strength and a super-high specific surface area and is widely applied to the fields of catalysis, adsorption, flexible sensors, thermal preservation and insulation materials and tissue engineering.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: May 27, 2025
    Assignee: QINGDAO UNIVERSITY
    Inventors: Kunyan Sui, Yanzhi Xia, Na Pan, Min Lin, Wenxin Fan, Huilin Cui, Yuyu Li
  • Publication number: 20250129543
    Abstract: The present invention provides a facile heteroepitaxial method for growing conductive zinc-catecholate frameworks on bio-fibers with biomimetic connections, which is beneficial to fabricate biocompatible and high-performance photodetectors and chemiresistors, and the corresponding bio-fiber based metal-organic framework. In this method, a conductive layer is first introduced on the surface of polysaccharide bio-fibers, before well-aligned zinc oxide nanoarrays were densely constructed on the bio-fibers by a physiological coagulation mechanism. The obtained fibrous materials may be used in devices, including in electronic components, having the advantages of good stability, environmental-friendly, flame retardancy, and high response.
    Type: Application
    Filed: September 8, 2022
    Publication date: April 24, 2025
    Inventors: Kewei ZHANG, Kai LIU, Yanzhi XIA, Xiankai LI, Zhe CHEN, Hui BIN
  • Publication number: 20240328037
    Abstract: An alginate fiber and a preparation method thereof are provided. The preparation method of the alginate fiber includes: S10: preparing a spinning solution with a raw material including sodium alginate; S20: extruding the spinning solution obtained in S10 into a solidification bath to allow solidification molding to obtain a primary fiber; S30: drawing and water-washing the primary fiber obtained in S20 to obtain an alginate fiber; and S40: soaking the alginate fiber obtained in S30 in a finishing agent to allow a post-treatment, where at least one of the raw material in S10, the solidification bath in S20, and the finishing agent in S30 includes a five-membered cyclic quaternary ammonium salt polymer. The alginate fiber obtained above has a high dye uptake, a small fiber strength loss, and a high soaping fastness.
    Type: Application
    Filed: May 9, 2022
    Publication date: October 3, 2024
    Applicant: QINGDAO UNIVERSITY
    Inventors: Yanzhi XIA, Dagang MIAO, Kai LI, Jiuyong YAO, Fangfang CHENG, Changhai XU
  • Patent number: 11913930
    Abstract: A bismuth oxide material with a hierarchical structure in gas detection used for detecting the content of low-concentration ammonia in an environment. The bismuth oxide material with the hierarchical structure integrally presents a microsphere shape. The diameter of the microsphere is 1-3 ?m. The bismuth oxide material is formed by self-assembling lamellar structure units with the thickness of 10-80 nm. The bismuth oxide material is made into a gas sensor with high sensitivity and selectivity to ammonia gas at room temperature, which is suitable for detecting trace harmful gas in the environment. The gas sensor made of bismuth oxide does not need to be heated when in use, so that the heating step of the conventional gas sensor is omitted, and the gas sensor can be directly placed in a normal-temperature environment for operation. The method is simple, easy to operate, high in efficiency and wide in application prospect.
    Type: Grant
    Filed: April 8, 2022
    Date of Patent: February 27, 2024
    Assignee: QINGDAO UNIVERSITY, CHINA
    Inventors: Kewei Zhang, Mingxin Zhang, Yanzhi Xia, Bin Hui, Anqin Zhou
  • Publication number: 20220326205
    Abstract: A bismuth oxide material with a hierarchical structure in gas detection used for detecting the content of low-concentration ammonia in an environment. The bismuth oxide material with the hierarchical structure integrally presents a microsphere shape. The diameter of the microsphere is 1-3 ?m. The bismuth oxide material is formed by self-assembling lamellar structure units with the thickness of 10-80 nm. The bismuth oxide material is made into a gas sensor with high sensitivity and selectivity to ammonia gas at room temperature, which is suitable for detecting trace harmful gas in the environment. The gas sensor made of bismuth oxide does not need to be heated when in use, so that the heating step of the conventional gas sensor is omitted, and the gas sensor can be directly placed in a normal-temperature environment for operation. The method is simple, easy to operate, high in efficiency and wide in application prospect.
    Type: Application
    Filed: April 8, 2022
    Publication date: October 13, 2022
    Inventors: Kewei ZHANG, Mingxin ZHANG, Yanzhi XIA, Bin HUI, Anqin ZHOU
  • Publication number: 20220205139
    Abstract: Disclosed in the present invention are a preparation method for a graphene oxide fiber, and fiber obtained thereby. A polyelectrolyte is prepared into a spinning stock solution by means of a wet spinning method, graphene oxide is added in a coagulation tank to serve as a coagulation bath, the spinning stock solution is injected into the coagulation bath, a diffusion reaction is carried out, and winding, washing and drying are carried out to obtain the graphene oxide fiber; the preparation method has the advantages that equipment is simple, the costs are low, the spinnability is good, and the method is suitable for large-scale production; moreover, the prepared fiber has multiple layers of fiber walls; the fiber has good tensile strength and a super-high specific surface area and is widely applied to the fields of catalysis, adsorption, flexible sensors, thermal preservation and insulation materials and tissue engineering.
    Type: Application
    Filed: April 30, 2020
    Publication date: June 30, 2022
    Applicant: QINGDAO UNIVERSITY
    Inventors: Kunyan SUI, Yanzhi XIA, Na PAN, Min LIN, Wenxin FAN, Huilin CUI, Yuyu LI
  • Patent number: 10190237
    Abstract: A method for preparing a salt-resistant and detergent-resistant alginate fiber by contacting and infiltrating a finished alginate fiber with a borate-containing adjuvant solution and using selected proper raw materials in selected proportions and reaction conditions. The preparation method solves the problem that the alginate fiber and a fabric made therefrom are neither salt-resistant nor detergent-resistant. The borate-modified alginate fiber and a fabric made therefrom have excellent salt resistances, and can be washed with an alkaline detergent. The swelling degree of the alginate fiber modified by the adjuvant solution can be reduced to 39.8% after the fiber is immersed in a normal saline at 30° C. for 72 h and can be reduced to 55.3% after the fiber is immersed in a standard detergent for 24 h, while the fiber maintains its original morphology without any obvious dissolution phenomenon, and the self flame-resisting performance of the alginate fiber is also maintained.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: January 29, 2019
    Assignee: QINGDAO UNIVERSITY
    Inventors: Yanzhi Xia, Xing Tian, Fangfang Cheng, Bingbing Wang, Fengyu Quan, Quan Ji
  • Publication number: 20180127896
    Abstract: A method for preparing a salt-resistant and detergent-resistant alginate fiber by contacting and infiltrating a finished alginate fiber with a borate-containing adjuvant solution and using selected proper raw materials in selected proportions and reaction conditions. The preparation method solves the problem that the alginate fiber and a fabric made therefrom are neither salt-resistant nor detergent-resistant. The borate-modified alginate fiber and a fabric made therefrom have excellent salt resistances, and can be washed with an alkaline detergent. The swelling degree of the alginate fiber modified by the adjuvant solution can be reduced to 39.8% after the fiber is immersed in a normal saline at 30° C. for 72 h and can be reduced to 55.3% after the fiber is immersed in a standard detergent for 24 h, while the fiber maintains its original morphology without any obvious dissolution phenomenon, and the self flame-resisting performance of the alginate fiber is also maintained.
    Type: Application
    Filed: April 15, 2016
    Publication date: May 10, 2018
    Applicant: QINGDAO UNIVERSITY
    Inventors: Yanzhi XIA, Xing TIAN, Fangfang CHENG, Bingbing WANG, Fengyu QUAN, Quan JI