Patents by Inventor Guanjun Chang
Guanjun Chang 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).
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Publication number: 20230391963Abstract: A reversible stress-responsive material, a preparation method, and a use thereof are provided. The reversible stress-responsive material prepared by the present disclosure has the property of real-time reversible force response at room temperature. When used with crosslinked plastic (high Tg) and rubber (low Tg) polymer materials, the reversible stress-responsive material can significantly enhance the mechanical strength and ductility of covalently cross-linked polymers. In the present disclosure, the triazolinedione (TAD)-indole click chemistry with the force-induced reversible property is used to construct a force-reversible crosslinked polymer material, and such a force-induced reversible crosslinking method can achieve the breakage and re-forming of covalent crosslinking points at room temperature in a solid state without any external stimuli other than the ambient temperature.Type: ApplicationFiled: August 19, 2022Publication date: December 7, 2023Applicants: Southwest University of Science and Technology, Sichuan Guanmusi Yang New Material Technology Co LTDInventors: Guanjun CHANG, Li YANG, Yewei XU, Ying HUANG, Rui YUAN, Mengqi DU
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Patent number: 11566112Abstract: A high-performance triple-crosslinked polymer and a preparation method thereof are provided. The polymer is obtained by curing and cross-linking a monomer having two epoxy groups, a cross-linking monomer and a functional monomer. The polymer contains a cross-linking network formed by covalent bonds and two types of multi-level hydrogen bonds with different strengths. The interaction strength between the covalent bonds and the two types of hydrogen bonds decreases in a gradient. The dilemma of the strength-ductility tradeoff in a high-performance polymer is overcome by forming a triple-crosslinked network with covalent bonds and multi-level hydrogen bonds with different strengths in the polymer. The dynamic and hierarchical hydrogen bonds are broken and recombined timely and continuously to concurrently maintain the complete structure of the polymer network and enable the polymer network to quickly respond to the transmission and dissipation of the external environment.Type: GrantFiled: April 21, 2020Date of Patent: January 31, 2023Assignees: Southwest University of Science and Technology, Sichuan Guanmusiyang New Material Technology Co., Ltd.Inventors: Guanjun Chang, Li Yang, Yewei Xu, Baoxuan Chang, Shien Yang, Rui Yuan
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Patent number: 11143591Abstract: A method for detecting or comparing mechanical strength of macro-molecular polymer materials. The detecting method has the steps of measuring the mechanical strength and the maximum value of the fluorescence absorption spectrum of each of the plurality of samples to form a curve relationship or function relationship between the maximum value of the fluorescence absorption spectrum and the mechanical strength; measuring the maximum value of the fluorescence absorption spectrum of the target material, and using the curve relationship or the function relationship to obtain the mechanical strength of the target material. The plurality of samples and the target material are both prepared from a macro-molecular polymer, and the macro-molecular polymer may be composed of disulfonate-difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers, and the sulfonate groups of the disulfonate-difluorobenzophenone have metal cations.Type: GrantFiled: February 14, 2020Date of Patent: October 12, 2021Assignee: SOUTHWEST UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Guanjun Chang, Li Yang, Zhongyuan Lu, Junxiao Yang
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Publication number: 20210253805Abstract: A high-performance triple-crosslinked polymer and a preparation method thereof are provided. The polymer is obtained by curing and cross-linking a monomer having two epoxy groups, a cross-linking monomer and a functional monomer. The polymer contains a cross-linking network formed by covalent bonds and two types of multi-level hydrogen bonds with different strengths. The interaction strength between the covalent bonds and the two types of hydrogen bonds decreases in a gradient. The dilemma of the strength-ductility tradeoff in a high-performance polymer is overcome by forming a triple-crosslinked network with covalent bonds and multi-level hydrogen bonds with different strengths in the polymer. The dynamic and hierarchical hydrogen bonds are broken and recombined timely and continuously to concurrently maintain the complete structure of the polymer network and enable the polymer network to quickly respond to the transmission and dissipation of the external environment.Type: ApplicationFiled: April 21, 2020Publication date: August 19, 2021Applicants: Southwest University of Science and Technology, Sichuan Guanmusiyang New Material Technology Co., Ltd.Inventors: Guanjun Chang, Li Yang, Yewei Xu, Baoxuan Chang, Shien Yang, Rui Yuan
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Publication number: 20200217793Abstract: A method for detecting or comparing mechanical strength of macro-molecular polymer materials. The detecting method has the steps of measuring the mechanical strength and the maximum value of the fluorescence absorption spectrum of each of the plurality of samples to form a curve relationship or function relationship between the maximum value of the fluorescence absorption spectrum and the mechanical strength; measuring the maximum value of the fluorescence absorption spectrum of the target material, and using the curve relationship or the function relationship to obtain the mechanical strength of the target material. The plurality of samples and the target material are both prepared from a macro-molecular polymer, and the macro-molecular polymer may be composed of disulfonate-difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers, and the sulfonate groups of the disulfonate-difluorobenzophenone have metal cations.Type: ApplicationFiled: February 14, 2020Publication date: July 9, 2020Inventors: GUANJUN CHANG, Li Yang, Zhongyuan Lu, Junxiao Yang
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Patent number: 10640612Abstract: A macro-molecular polymer and its preparation method. The macro-molecular polymer takes disulfonate-difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers for which a sulfonate group of the disulfonate-difluorobenzophenone is a metal cation. High-performance polymers can be obtained with crosslinked structure among molecular chains by a way of interaction of metal cations ??, and further to obtain a high performance polymer having good mechanical properties and stability. Furthermore, the polymer facilitates recovery and has good reproducibility and recycling properties.Type: GrantFiled: January 30, 2018Date of Patent: May 5, 2020Assignee: SOUTHWEST UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Guanjun Chang, Li Yang, Zhongyuan Lu, Junxiao Yang
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Patent number: 10564099Abstract: A method for detecting or comparing mechanical strength of macro-molecular polymer materials. The detecting method has the steps of measuring the mechanical strength and the maximum value of the fluorescence absorption spectrum of each of the plurality of samples to form a curve relationship or function relationship between the maximum value of the fluorescence absorption spectrum and the mechanical strength; measuring the maximum value of the fluorescence absorption spectrum of the target material, and using the curve relationship or the function relationship to obtain the mechanical strength of the target material. The plurality of samples and the target material are both prepared from a macro-molecular polymer, and the macro-molecular polymer may be composed of disulfonate-difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers, and the sulfonate groups of the disulfonate-difluorobenzophenone have metal cations.Type: GrantFiled: January 30, 2018Date of Patent: February 18, 2020Assignee: Southwest University of Science and TechnologyInventors: Guanjun Chang, Li Yang, Zhongyuan Lu, Junxiao Yang
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Publication number: 20180348130Abstract: A method for detecting or comparing mechanical strength of macro-molecular polymer materials. The detecting method has the steps of measuring the mechanical strength and the maximum value of the fluorescence absorption spectrum of each of the plurality of samples to form a curve relationship or function relationship between the maximum value of the fluorescence absorption spectrum and the mechanical strength; measuring the maximum value of the fluorescence absorption spectrum of the target material, and using the curve relationship or the function relationship to obtain the mechanical strength of the target material. The plurality of samples and the target material are both prepared from a macro-molecular polymer, and the macro-molecular polymer may be composed of disulfonate—difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers, and the sulfonate groups of the disulfonate—difluorobenzophenone have metal cations.Type: ApplicationFiled: January 30, 2018Publication date: December 6, 2018Applicant: Southwest University of Science and TechnologyInventors: Guanjun Chang, Li Yang, Zhongyuan Lu, Junxiao Yang
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Publication number: 20180346650Abstract: A macro-molecular polymer and its preparation method. The macro-molecular polymer takes disulfonate-difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers for which a sulfonate group of the disulfonate-difluorobenzophenone is a metal cation. High-performance polymers can be obtained with crosslinked structure among molecular chains by a way of interaction of metal cations ??, and further to obtain a high performance polymer having good mechanical properties and stability. Furthermore, the polymer facilitates recovery and has good reproducibility and recycling properties.Type: ApplicationFiled: January 30, 2018Publication date: December 6, 2018Applicant: Southwest University of Science and TechnologyInventors: Guanjun Chang, Li Yang, Zhongyuan Lu, Junxiao Yang
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Patent number: 10119005Abstract: A method for recovering, regenerating and repairing polymer. The method includes immersing a polymer in an acid solution so that hydrogen ions of the acid solution replace metal cations of the polymer to obtain an acid-treated polymer, and to realize the recovery of the polymers. Subsequently, the acid-treated polymer is immersed in an alkaline solution to obtain a base-treated polymer to realize the regeneration of the polymers. The polymer is composed of disulfonate-difluorobenzophenone, hydroxyindole and difluorobenzophenone as monomers, and sulfonate groups of the disulfonate-difluorobenzophenone have metal cations. The method replaces the metal cations with hydrogen ions to realize the recovery of the polymers and reduce environmental pollutions. The regeneration of polymers is realized by replacing the hydrogen ions with the metal cation, and resource recycling. Through the process of local repair, the service life of the product of polymers can be prolonged.Type: GrantFiled: January 30, 2018Date of Patent: November 6, 2018Assignee: Southwest University of Science and TechnologyInventors: Guanjun Chang, Li Yang, Zhongyuan Lu, Junxiao Yang