公开(公告)号：US20240246261A1

公开(公告)日：2024-07-25

申请号：US18328578

申请日：2023-06-02

Applicant: QINGDAO UNIVERSITY OF TECHNOLOGY

Inventor： Sen LIANG ,  Fengquan WANG ,  Cheng TIAN ,  Long WU

IPC: B29B15/12 ,  B29C70/44

CPC classification number: B29B15/125 ,  B29C70/443 ,  B29K2307/04

Abstract: A method with which mechanical properties of the interface of the fiber reinforced thermoplastic resin matrix composite material can be improved by conducting grafting on surfaces of materials. A carbon fiber (CF) and a polymethyl methacrylate resin (PMMA) are subjected to interface modification treatment to introduce active carboxyl groups to the surfaces of the materials. Then, hexamethylene diisocyanate (HDI) is used as a coupling layer for connecting the carboxyl groups on the surfaces of the carbon fiber and on the surfaces of the polymethyl methacrylate resin to form a “molecular bridge”. Accordingly, the interface binding force between the resin and the fiber is improved by chemical grafting. A modified carbon fiber reinforced polymethyl methacrylate composite material sample (CF/PMMA) is prepared by a thin film lamination method, and the composite material sample prepared is subjected to a microscopic verification testing of the validity of the method provided in the present disclosure.

公开(公告)号：US20230358442A1

公开(公告)日：2023-11-09

申请号：US18354871

申请日：2023-07-19

Applicant: Qingdao University of Technology

Inventor： Sen LIANG ,  Ruijun SUN ,  Qinglun CHE ,  Long WU

IPC: F24H9/14 ,  F24H9/00 ,  F24H1/18

CPC classification number: F24H9/14 ,  F24H9/0005 ,  F24H1/181

Abstract: A tooling and method for flexible through connection of a double-liner water heater. The tooling includes a transition shaft, a tooling connecting plate and a fastening screw. The method includes: allowing a shaft head of the transition shaft to be in fit with an inner surface of an outer flange of a lower liner for welding; allowing an end hole to be in fit with an outer surface of an inner flange of an upper liner for welding; after welding seams are cooled, removing the tooling, and enameling the upper and liners; forming through-flexible connection between the inner and outer flanges; and firmly fitting the upper and lower liners together with two steel strips to ensure that a gap between the upper and lower liners is not greater than 7 mm.