公开(公告)号：US10913823B2

公开(公告)日：2021-02-09

申请号：US16312737

申请日：2018-03-28

Applicant: Huazhong University of Science and Technology

Inventor： Xiaolin Xie ,  Yong Wang ,  Xingping Zhou ,  Yunsheng Ye ,  Zhigang Xue ,  Xiaojing Li

IPC: C08L69/00 ,  C08G77/388 ,  C08G77/448 ,  C08G77/458 ,  C08G77/04

Abstract: A POSS-based non-isocyanate polyurethane modified poly(propylene carbonate) and a method of making are described. The POSS-based non-isocyanate polyurethane modified poly(propylene carbonate) includes a poly(propylene carbonate) and 1 to 20 wt % of a POSS-based non-isocyanate polyurethane. The method includes subjecting a POSS-based epoxy compound to a cycloaddition reaction with CO2 to obtain a POSS-based cyclic carbonate under an action of a catalyst, and subjecting the POSS-based cyclic carbonate to a ring-opening reaction with a monoamino compound to obtain the POSS-based non-isocyanate polyurethane. Polyurethane bonds and hydroxyl in the POSS-based non-isocyanate polyurethane serve as proton donors and forms a high-density of hydrogen bonds with carbonate units of the poly(propylene carbonate), enhancing the compatibility of the POSS-based non-isocyanate polyurethane with the poly(propylene carbonate).

公开(公告)号：US11608416B2

公开(公告)日：2023-03-21

申请号：US17639592

申请日：2020-01-13

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xingping Zhou ,  Yajun Zhao ,  Yong Wang ,  Xiaolin Xie

IPC: C08F220/14 ,  C08F293/00 ,  C08G81/02 ,  C08G63/06 ,  C08G63/66 ,  C08G63/82

Abstract: A method for synthesizing an aliphatic polyester block copolymer regulated by carbon monoxide. The method uses an organic cobalt metal complex as a convertible catalyst and includes: first regulating an anionic ring-opening copolymerization reaction between an aliphatic acid anhydride and an epoxy compound; then using carbon monoxide as a conversion agent for conversion to obtain a catalyst having a new catalytic active site; and regulating a vinyl monomer to perform active free radical polymerization to obtain an aliphatic polyester block copolymer having a controllable structure. The described synthesis method uses a convertible catalyst and a conversion agent, combines two controllable polymerization reactions which have different but compatible mechanisms, and obtains a block copolymer by means of a “one-pot” reaction.

公开(公告)号：US10756537B2

公开(公告)日：2020-08-25

申请号：US15580520

申请日：2016-11-28

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  GUANGZHOU POWER SUPPLY CO. LTD.

Inventor： Zhao Yuan ,  Junxiang Liu ,  Fating Yuan ,  Lixue Chen ,  Junjia He ,  Yuan Pan ,  Kaijian Wu ,  Yong Wang ,  Wenxiong Mo ,  Haibo Su

IPC: H02H9/02 ,  H02H3/02

Abstract: A short circuit fault current limiter includes a circuit breaker, a transfer current limiting unit and a current detection unit. The current detection unit is connected to the circuit breaker in series, and the circuit breaker and the transfer current limiting unit are connected in parallel into the power system line. An output terminal of the current detection unit is connected to a control terminal of the transfer current limiting unit. The current detection unit is configured to detect a fault current flowing through a branch of the circuit breaker under a short circuit fault operating condition and trigger the corresponding trigger switch of the transfer current limiting unit to be switched on, so that the circuit breaker is disconnected and the secondary side winding of the coupling reactor is connected to the system line in series, which is capable of rapidly limiting the amplitude of the fault current and reducing impact of the fault current on the system.