Ying Zhong

Document Type

Article

Publication Date

August 2025

Patent Number

12389837

CPC

A01G 9/242 , B32B 27/08

Abstract

A ventilation port maintains the humidity range within a sealed or partially sealed enclosure maintaining a level of atmospheric moisture such as a greenhouse. The port is comprised of a polymer blend film made of a hydrophilic component serving as the water-absorbing material and substrate component serving as the mechanical backbone. The film is designed to bend and open the port when the humidity within the enclosure exceeds a predetermined level outside the humidity range, allowing for the venting of excess humidity. Once the humidity falls back within the desired range, the film returns to its original state and closes the port. A humidity sensing device is also disclosed including the film with a piezoresistive material layer, electrodes in electrical communication with the layer, and an electrical measurement device to measure resistivity or capacitance. The strain of the layer due to changes in humidity results in changes in its electrical properties, allowing the device to indicate corresponding humidity levels.

Application Number

18/121033

Assignees

University of South Florida

Filing Date

03/14/2023

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