Unlock instant, AI-driven research and patent intelligence for your innovation.

Porous substrate-based flexible exhaled ammonia gas sensor and preparation method thereof

An ammonia gas sensor and substrate technology, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of wearable ammonia gas sensors such as difficulty, poor sensitivity, poor air permeability and softness, etc., to improve wearability, Low production cost and improved air permeability

Inactive Publication Date: 2019-04-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF9 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: the present invention provides a flexible exhaled ammonia sensor based on a porous substrate and a preparation method thereof, which solves the problem of the poor air permeability and softness of materials used in existing ammonia sensors, which leads to the difficulty of preparing wearable ammonia sensors The problem of large and poor sensitivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous substrate-based flexible exhaled ammonia gas sensor and preparation method thereof
  • Porous substrate-based flexible exhaled ammonia gas sensor and preparation method thereof
  • Porous substrate-based flexible exhaled ammonia gas sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] A preparation method of an exhaled ammonia sensor as claimed in claim 1, comprising the steps of:

[0046] Step 1: cleaning the porous flexible sheet substrate or fibrous substrate;

[0047] Step 2: performing oxygen plasma treatment on the porous flexible sheet substrate or fibrous substrate;

[0048] Step 3: Deposit a highly moisture-resistant sensitive film on a porous flexible sheet substrate or a fibrous substrate by in-situ chemical polymerization or suction filtration, soaking, spraying sensitive material dispersion or a combination of the two methods ;

[0049] Step 4: cutting the sheet substrate with the sensitive film deposited or weaving the fibrous substrate with the sensitive film deposited;

[0050] Step 5: Prepare electrodes on both sides of the sensitive film by evaporation or printing or spraying process.

[0051] If the porous flexible sheet substrate in step 1 uses a microporous filter membrane or a battery separator, use deionized water to ultraso...

Embodiment 1

[0057] A flexible exhaled ammonia sensor based on a porous substrate, including a substrate 1, a sensitive film 2 covering the substrate 1, and electrodes 3 arranged on both sides of the sensitive film 2, and the substrate 1 is in the form of a porous flexible organic sheet material or fibrous material, the sensitive film 2 is a flexible ammonia sensitive film with strong moisture resistance; the substrate 1 is a water-based microporous filter membrane made of polyethersulfone; the sensitive film 2 is made of a conductive organic polymer material, and the material is polyaniline PANI; Electrode 3 is made of conductive silver paste.

[0058] The preparation method is as follows:

[0059] A water-based microporous filter membrane with a diameter of 50 mm and a pore size of 0.2 μm, made of polyethersulfone, was used as the substrate; first, the substrate was ultrasonically cleaned with deionized water, and dried in a vacuum oven at 60 °C . Secondly, the substrate is treated wit...

Embodiment 2

[0063] Compared with Example 1, this example differs in that: before preparing the hydrochloric acid-doped polyaniline film, a layer of WS was prepared on the substrate by vacuum filtration. 2 film. The specific method is as follows, configure 0.2mg / ml small-diameter few-layer WS 2 Solution 10ml (sheet size: 20-500nm; layer number: 1-10 layers), and then prepare WS on the microporous membrane by vacuum filtration 2 film. Subsequently, according to the method in Example 1 in WS 2 Polyaniline film was prepared on the film. Finally, cut the substrate, prepare the electrode, and obtain the polyaniline / WS 2 Composite film flexible and breathable breath ammonia sensor;

[0064] Graphene-like materials and conductive organic polymer materials are used for compounding. Due to the synergistic effect, the sensitivity of the sensor in high-humidity environments is improved. Graphene-like materials can also be made of molybdenum disulfide MoS 2 Or tungsten diselenide WSe 2 Or molyb...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Deposition thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a porous substrate-based flexible exhaled ammonia gas sensor and a preparation method thereof, and relates to the field of gas-sensitive materials for membrane gas sensors andorganic / inorganic composite semi-conductor. The porous substrate-based flexible exhaled ammonia gas sensor comprises a substrate, a sensitive membrane and electrodes, wherein the substrate is coated with the sensitive membrane; the electrodes are arranged on two sides of the membrane; the substrate is made of a porous flexible organic sheet material or a fiber material; and the sensitive membraneis a moisture-resistant flexible ammonia gas sensitive membrane. In the porous substrate-based flexible exhaled ammonia gas sensor, the porous flexible organic sheet material or the fiber material istaken as the substrate, so that the air permeability of the sensor is improved, and the wearing comfort is enhanced. The contact area between the sensitive material and the gas is increased through the porous structure to provide an effective channel for the dispersion and transmission of gas molecules, so that the sensitivity and response speed of the gas sensor are improved. A conductive organicpolymer material or a derived composite material is used for preparing the gas sensitive membrane, so that the porous substrate-based flexible exhaled ammonia gas sensor has higher sensitivity and higher moisture resistance specific to low-concentration ammonia gas at room temperature.

Description

technical field [0001] The invention relates to the fields of thin-film gas sensors and organic / inorganic compound semiconductor gas-sensitive materials, in particular to a flexible exhaled ammonia sensor based on a porous substrate and a preparation method thereof. Background technique [0002] Chronic kidney disease (CKD) is a global public health problem that can lead to kidney failure and death. According to statistics from Peking University First Hospital, the prevalence rate of chronic kidney disease in China is 10.8%, and there are 140 million chronic kidney disease patients among Chinese adults, while the awareness rate of chronic kidney disease is only 12.5%, which is about 1.5% in the United States. Calculate the proportion of patients with chronic kidney disease who will develop into end-stage renal disease ESRD. At the same time, considering the increasing number of ESRD patients in China and the continuous improvement of the survival cycle of patients, there are...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N27/30
CPCG01N27/308
Inventor 太惠玲刘春华潘虹张俊新蒋亚东袁震谢光忠杜晓松
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com