Preparation method of PDMS film with thermosensitivity

A thin-film, temperature-sensitive technology, applied in the field of preparation of PDMS thin films, can solve the problems of complex methods of temperature-sensitive thin films, poor oxidative photostability, reduced temperature-sensitive characteristics, etc., and achieves easy-to-master process, short time-consuming, and simple experimental equipment. Effect

Inactive Publication Date: 2016-02-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the layer-by-layer method can be used to prepare a film-like temperature-sensitive quantum dot film, but the temperature-sensitive film prepared by this method is easy to oxidize and has poor light stability due to exposure to air, so it is easy to Photobleaching will occur to reduce its temperature-sensitive properties, and the Layer-by-Layer method to prepare temperature-sensitive films is complicated and time-consuming

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  • Preparation method of PDMS film with thermosensitivity
  • Preparation method of PDMS film with thermosensitivity
  • Preparation method of PDMS film with thermosensitivity

Examples

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Effect test

Embodiment 1

[0022] A method for preparing a PDMS film with temperature-sensitive properties, comprising the following steps:

[0023] The first step, the preparation of temperature-sensitive cadmium telluride quantum dots: take 46mL ultrapure water and place it in a three-neck round bottom flask, deoxygenate with nitrogen gas for 30min by bubbling method, then add 0.04mol / L cadmium acetate aqueous solution, 0.01mol / L Potassium tellurite aqueous solution was added to 4mL according to the volume ratio of 1:1, followed by adding 400mg of sodium citrate, 100mg of mercaptosuccinic acid and 50mg of sodium borohydride to form a final precursor solution. Condensation and reflux reaction in an oil bath, by controlling the reaction time for 9 hours, temperature-sensitive cadmium telluride quantum dots were obtained;

[0024] The second step, the purification and redispersion of cadmium telluride quantum dots: the cadmium telluride quantum dots prepared in the first step are subjected to rotary eva...

Embodiment 2

[0028] A method for preparing a PDMS film with temperature-sensitive properties, comprising the following steps:

[0029] The first step, the preparation of temperature-sensitive cadmium telluride quantum dots: take 46mL ultrapure water and place it in a three-neck round bottom flask, deoxygenate with nitrogen gas for 30min by bubbling method, then add 0.04mol / L cadmium acetate aqueous solution, 0.01mol / L Potassium tellurite aqueous solution was added to 4mL according to the volume ratio of 1:1, and then 400mg of sodium citrate, 100mg of mercaptosuccinic acid and 50mg of sodium borohydride were added in sequence to form a precursor solution. Condensation and reflux reaction in an oil bath, by controlling the reaction time for 9 hours, temperature-sensitive cadmium telluride quantum dots were obtained;

[0030] The second step, the purification and redispersion of cadmium telluride quantum dots: the cadmium telluride quantum dots prepared in the first step are subjected to rot...

Embodiment 3

[0034] A method for preparing a PDMS film with temperature-sensitive properties, comprising the following steps:

[0035] The first step, the preparation of temperature-sensitive cadmium telluride quantum dots: take 46mL ultrapure water and place it in a three-neck round bottom flask, deoxygenate with nitrogen gas for 30min by bubbling method, then add 0.04mol / L cadmium acetate aqueous solution, 0.01mol / L Potassium tellurite aqueous solution was added to 4mL according to the volume ratio of 1:1, and then 400mg of sodium citrate, 100mg of mercaptosuccinic acid and 50mg of sodium borohydride were added in turn to form a precursor solution. Condensation and reflux reaction in an oil bath, by controlling the reaction time for 9 hours, temperature-sensitive cadmium telluride quantum dots were obtained;

[0036] The second step, the purification and redispersion of cadmium telluride quantum dots: the cadmium telluride quantum dots prepared in the first step are subjected to rotary ...

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Abstract

A preparation method of a PDMS film with thermosensitivity comprises the following steps: carrying out rotary evaporative concentration on aqueous-phase cadmium telluride quantum dots prepared by a hydrothermal method, carrying out purification treatment by settling with isopropanol, dispersing the purified product in anhydrous ethanol, uniformly dispersing the cadmium telluride quantum dots in a PDMS prepolymer through the affinity interaction between the PDMS prepolymer and aqueous-phase quantum dots, mixing and curing by adding a curing agent, so as to obtain optically transparent PDMS film with thermosensitivity. The raw materials used in the invention are easily available, required experimental equipment is simple, and the technological process is easy to master. By the preparation method, a thermosensitive PDMS film having uniform euphotic layer and with good film-forming ability can be prepared.

Description

technical field [0001] The invention belongs to the technical field of flexible temperature measurement, in particular to a method for preparing a PDMS film with temperature-sensitive properties. Background technique [0002] In the field of mechanical engineering, temperature is an important measure of equipment operation. In cell biology, temperature is also an important indicator for distinguishing diseased cells from normal cells. On integrated circuits, excessively high temperatures indicate integration Circuit malfunction. Thin films with temperature-sensitive properties have broad application prospects in mechanical engineering, biomedicine, and integrated circuits. The PDMS film doped with quantum dots has temperature-sensitive properties, and can be used as a temperature-sensitive probe in the above fields, and can timely monitor the thermal information of the measured object. At present, the layer-by-layer method can be used to prepare a film-like temperature-sen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L83/04C08K3/30C09K11/88
Inventor 江新兵李本强于伟杨欢
Owner XI AN JIAOTONG UNIV
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