公开(公告)号：US20240342661A1

公开(公告)日：2024-10-17

申请号：US18754201

申请日：2024-06-26

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Rongrong CAI ,  Jiusi WANG ,  Lizhi ZHANG

IPC: B01D69/08 ,  B01D46/00 ,  B01D46/54 ,  B01D46/66 ,  B01D53/22 ,  B01D65/02 ,  B01D67/00 ,  B01D71/36 ,  B01D71/80

CPC classification number: B01D69/087 ,  B01D46/0032 ,  B01D46/543 ,  B01D46/785 ,  B01D53/228 ,  B01D65/02 ,  B01D67/0083 ,  B01D67/0095 ,  B01D69/081 ,  B01D71/36 ,  B01D71/80 ,  B01D2321/22 ,  B01D2323/081 ,  B01D2323/12 ,  B01D2323/35 ,  B01D2323/39

Abstract: Provided are a recyclable electret filtering membrane, a preparation method therefor and a cleaning and charge regeneration method therefor. The preparation method includes: dissolving fluorine-containing polymer particles and polyoxyethylene particles in deionized water to prepare a spinning solution, and then performing electrostatic spinning, calcining, cooling, drying and corona charging to obtain the recyclable electret filtering membrane. A surface of the filtering membrane is subjected to water drop rolling cleaning and friction electrification after dust holding, and then dried to realize charge regeneration and reuse. The filtering membrane obtained in the present invention has an initial surface potential of (−600)-(−950) V, the potential can be regenerated to (−700)-(−1000) V by water drop rolling and electrification after dust holding, the charge recovery rate is 90%-125%, the dust removal rate is 90%-100%, and the filtering efficiency for PM2.5 is equal to or greater than 94%.

公开(公告)号：US20220307773A1

公开(公告)日：2022-09-29

申请号：US17612573

申请日：2019-10-28

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Lizhi ZHANG ,  Hong YU ,  Chuanshuai DONG

IPC: F28D20/00 ,  C09K5/06

Abstract: A controllable phase change material bag and a preparation method and an application thereof are provided. The preparation method comprises the following steps: 1, form a metal plate or a metal bar with a rough surface, embedding a powder seed crystal that induces a phase change material to nucleate on the surface, then placing the metal plate or the metal bar in a sodium acetate solution to obtain a controllable trigger metal electrode (1); and 2, mixing a sodium acetate trihydrate crystal, water and a thickener to obtain an oversaturated phase change heat storage solution, pouring the solution into a metal ball (2), carrying out encapsulation after inserting the controllable trigger metal electrode obtained in the step 1 and a conducting electrode (3), and finally placing in the water bath to preserve heat to obtain the controllable phase change material bag.

公开(公告)号：US20210138396A1

公开(公告)日：2021-05-13

申请号：US16492151

申请日：2017-12-29

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Ronghui QI ,  Lizhi ZHANG

IPC: B01D53/26 ,  B01D53/32 ,  B01D53/30 ,  F24F3/14 ,  F24F11/30 ,  F24F11/62

Abstract: Disclosed is an electrochemical dehumidification device based on a screen-type amphoteric ion exchange membrane electrode, comprising a core dehumidification unit which comprises, sequentially from one side to the other side, an anode air pathway, a screen-type anode electrode, an amphoteric ion exchange membrane, a screen-type cathode electrode and a cathode air pathway. The core dehumidification unit performs active dehumidification when a voltage is applied, and performs passive dehumidification when no voltage is applied. A number of the core dehumidification unit is equal to or more than one, the core dehumidification units are capable of being connected in parallel, in serial or in an overlapping mode; meanwhile, the units may also be used in combination with other dehumidification devices. The device achieves active/passive dehumidification, and is ultra-compact and flexible.

公开(公告)号：US20200261854A1

公开(公告)日：2020-08-20

申请号：US16638468

申请日：2018-04-23

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Lizhi ZHANG ,  Qianwen SU

IPC: B01D67/00 ,  B01J13/00 ,  C02F1/44 ,  B01D61/02 ,  B01D71/82 ,  B01D71/10 ,  B01D69/02 ,  B01D53/26 ,  B01D69/08

Abstract: The invention relates to a self-supporting highly moisture-permeable heat-insulating aerogel film and a preparation method thereof. The aerogel film is a self-supporting single-layer film with a SiO2 porous skeleton structure, having a thickness of 150 μm to 300 μm, which increases an exchange rate of vapor by 50% to 200%, and reduces a heat conductivity coefficient by 50% to 90%. The preparation method includes the following steps: (1) preparation of a template; (2) hydrolysis of nano-cellulose; (3) preparation of an aerogel film; and (4) post-treatment of the aerogel film.