Nitrogen-doped carbon foam prepared by carbonizing polyester and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A nitrogen-doped carbon and polyester technology, applied in the field of nitrogen-doped carbon foam and its preparation, can solve the problems of high energy consumption, high carbonization temperature, and complicated preparation process, so as to avoid reaction conditions, reduce carbonization temperature, and prepare The effect of simple process
Active Publication Date: 2021-04-02
HUAZHONG UNIV OF SCI & TECH
View PDF13 Cites 2 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
This solves the technical problems such as high carbonization temperature resulting in high energy consumption and complicated preparation process in the preparation of nitrogen-doped carbon foam by carbonization of existing polyester
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0038] A nitrogen-doped carbon foam prepared by carbonizing polyester is prepared according to the following method:
[0039] (1) Weigh 1.5g polyethylene terephthalate (produced by Shandong Youso Chemical Co., Ltd.), 0.75g melamine (Sinopharm Chemical Reagent Co., Ltd.), 1.26g sodium chloride (Sinopharm Chemical Reagent Co., Ltd. company) and 1.74g zinc chloride (Shanghai Lingfeng Chemical Reagent Co., Ltd.), placed in a ball mill and stirred until uniformly mixed.
[0040] (2) Put the mixture obtained in step (1) into a crucible, then put it into a muffle furnace to heat up, set the muffle furnace at a heating rate of 10°C / min, and raise it to a carbonization temperature of 340°C to obtain carbonization product, and the carbonized product is obtained after separating the molten salt.
[0041] The prepared carbonized products such as figure 1 (a) shown. The product is carbon black, indicating that polyethylene terephthalate, melamine, and molten salt have been completely ca...
Embodiment 2
[0043] The 0.75g of melamine in Example 1 was replaced with 1.125g, and the other steps remained unchanged to obtain a carbonized product of polyethylene terephthalate, melamine and molten salt.
[0044] The prepared carbonized products such as figure 1 (b) shown. The product is carbon black, indicating that polyethylene terephthalate, melamine and molten salt have been completely carbonized under this condition.
Embodiment 3
[0046] The 0.75 g of melamine in Example 1 was replaced by 1.5 g, and other steps remained unchanged to obtain a carbonized product of polyethylene terephthalate, melamine and molten salt.
[0047] The prepared carbonized products such as figure 1 (c) shown. The product is carbon black, indicating that polyethylene terephthalate, melamine and molten salt have been completely carbonized under this condition.
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
Login to view more
Abstract
The invention belongs to the technical field of nitrogen-doped carbon foam, and particularly relates to nitrogen-doped carbon foam prepared by carbonizing polyester and a preparation method of the nitrogen-doped carbon foam. The preparation method comprises the following steps: (1) uniformly mixing a polyester material, a cross-linking agent and molten salt to obtain a polyester and cross-linkingagent and molten salt mixture, wherein the cross-linking agent is a polyamino compound; and (2) heating the polyester and cross-linking agent and molten salt mixture to a carbonization temperature toobtain a carbonization product, and pickling the carbonization product to remove the molten salt, thereby obtaining the nitrogen-doped carbon foam. The introduction of the cross-linking agent promotesthe cross-linking reaction of polyester, the carbonization temperature is effectively reduced, the existence of the low-melting-point molten salt catalyst can eliminate part of weak chemical bonds inthe cross-linking structure to generate carbon dioxide, water vapor and other small molecular products, and the degradation products serve as the effect of an in-situ foaming agent, therefore, the utilization rate of polyester in the carbonization process is increased, and the method has great application potential in the aspect of recycling of waste polyester.
Description
technical field [0001] The invention belongs to the technical field of nitrogen-doped carbon foam, and more specifically relates to a nitrogen-doped carbon foam prepared by carbonizing polyester and a preparation method thereof. Background technique [0002] Carbon foam has the advantages of low density, high strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good impact resistance and stable size. The highest theoretical temperature of carbon foam is 2600°C, and it is one of the most promising high-temperature materials. The raw material for making carbon foam is generally polyester. As a common plastic in life, polyester is widely used in product packaging, such as beverage bottles. The carbon content in polyester is usually high, easy to recycle and extremely cheap and easy to obtain. Common methods for preparing carbon foams using polyester as a carbon source include supercritical method and template metho...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more