Pleurotus eryngii-based photo-thermal conversion material and preparation method thereof
A light-to-heat conversion material and light-to-heat conversion technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of increased material cost, high manufacturing cost, and poor environmental friendliness, and reduce heat loss and reaction Good activity and simple operation
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[0030] A preparation method of Pleurotus eryngii-based light-to-heat conversion material provided by the invention comprises the following steps:
[0031] S1. Ultrasonic cleaning the Pleurotus eryngii mushrooms cut into preset columns with deionized water, take out and remove the surface moisture, then freeze at -20~-5℃ for 6~24h, and then transfer to -80~-20 The temperature is ℃ and the vacuum environment is frozen for 48 to 96 hours to obtain the pretreated Pleurotus eryngii.
[0032] The cut Pleurotus eryngii is placed in the environment of -20~-5℃ and frozen for 6~24 hours. The reason is that -20℃ is enough to freeze the water in the Pleurotus eryngii. Too low a temperature wastes a lot of energy. When the temperature is higher than At -5°C, the freezing rate is slow. The freezing time is selected to be 6-24 hours. When the time is higher than 24 hours, the Pleurotus eryngii has been completely frozen, resulting in high energy consumption; when the time is lower than 6 ho...
Embodiment 1
[0046] A Pleurotus eryngii-based light-to-heat conversion material, prepared by the following steps:
[0047] S1. Pretreatment of Pleurotus eryngii
[0048] Soak fresh Pleurotus eryngii in deionized water and put it into an ultrasonic cleaner, use 80Hz frequency ultrasonic cleaning for 60 minutes, wipe off the moisture on the surface of Pleurotus eryngii with absorbent paper, and then cut Pleurotus eryngii into cylinders or cuboids Or cube, the cut Pleurotus eryngii is frozen in -20℃ environment for 6h, the frozen Pleurotus eryngii is placed in a vacuum of 10Pa, and the temperature is -80℃ for 96h, and the pretreated Pleurotus eryngii can be obtained by taking it out mushroom.
[0049] Wherein, the mass ratio of deionized water used for soaking Pleurotus eryngii and Pleurotus eryngii is 5:1, and the diameter of cylinder is 5cm, and height is 8cm, and the high direction is the growth direction of Pleurotus eryngii.
[0050] S2. Preparation of dopamine hydrochloride reaction s...
Embodiment 2-5 and comparative example 1-3
[0057] Compared with Example 1, the Pleurotus eryngii-based photothermal conversion materials provided in Examples 2-5 and Comparative Examples 1-3 are different in that in step S1, the freezing temperature and vacuum freezing temperature are shown in Table 1 , and others are substantially the same as those in Embodiment 1, and will not be repeated here.
[0058] The preparation conditions of table 1 embodiment 2-5 and comparative example 1-3
[0059] Test case Freezing temperature (℃) Vacuum freezing temperature (℃) Example 2 -10 -80 Example 3 -5 -80 Example 4 -20 -60 Example 5 -20 -20 Comparative example 1 Not frozen -80 Comparative example 2 -20 Not vacuum frozen Comparative example 3 Not frozen Not vacuum frozen
[0060] In step S1, the freezing treatment of the sample before the vacuum freeze-drying is the premise of the vacuum freeze-drying, if the freezing treatment is not performed, the vacuum freez...
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