废弃墨粉纳米流体的光热特性

doi:10.16085/j.issn.1000-6613.2022-1974

摘要/Abstract

摘要：

在目前的废弃打印机和硒鼓处理中，废弃墨粉往往被忽略，导致弥散到空气中引发呼吸系统疾病。本文以废弃墨粉为吸光材料进行光热利用，采用两步法制备不同浓度的废弃墨粉-乙二醇苯醚纳米流体，研究其稳定性、光学性能和光热转换性能。结果表明：在不添加任何表面活性剂的情况下，废弃墨粉-乙二醇苯醚纳米流体具有较好的稳定性。添加废弃墨粉颗粒可以降低基液的透光率，增大消光系数，从而提高基液的光吸收能力。在光热转换实验中，每种浓度的废弃墨粉纳米流体都表现出较好的光热转换效果，本实验中最佳质量分数为0.04%，在经过1800s的辐照（辐射强度为1000W/m²）后，全程光热转换效率可达54.95%，比基液乙二醇苯醚提高了90.41%。本研究以期为废弃墨粉的转化与再利用提供新思路。

关键词: 废弃墨粉, 集热介质, 纳米流体, 光学特性, 光热转换

Abstract:

Waste toner is ignored in current disposal of waste printers and toner cartridges, causing diffusion into the air and respiratory diseases. To use waste toner as light absorbing material for photothermal conversion, a two-step method was proposed to prepare waste toner-ethylene glycol phenyl ether nanofluids. The stability, optical properties and photothermal conversion properties were studied. The results indicated that the waste toner-ethylene glycol phenyl ether nanofluids had good stability without adding any surfactant, and the light absorption capacity of the base solution could be improved by adding waste toner particles due to the reduction of light transmittance and increase of extinction coefficient. In the photothermal conversion experiment, all concentration of the waste toner nanofluids showed good photothermal conversion effect. The optimal concentration in this experiment was 0.04% and the photothermal conversion efficiency was 54.95%, which was 90.41% higher than that of base solution. This study hoped to provide a new idea for photothermal conversion and reuse of waste toner.

Key words: waste toner, heat collecting medium, nanofluids, optical properties, photothermal conversion

中图分类号:

TK01⁺9

张岱凌, 丁玉梅, 左夏华, 黎昊为, 杨卫民, 阎华, 安瑛. 废弃墨粉纳米流体的光热特性[J]. 化工进展, 2023, 42(9): 4791-4798.

ZHANG Dailing, DING Yumei, ZUO Xiahua, LI Haowei, YANG Weimin, YAN Hua, AN Ying. Photothermal characteristics of waste toner nanofluids[J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4791-4798.

图/表 11

图1 废弃墨粉-乙二醇苯醚纳米流体制备

图2 纳米流体光热转换实验原理1—太阳光模拟器；2—装有集热介质的真空玻璃瓶；3—隔热棉；4—太阳能功率计；5—K型热电偶线；6—数据采集器；7—计算机

图3 墨粉颗粒的能量色散光谱（EDS）图

图4 废弃墨粉-乙二醇苯醚纳米流体的透射电子显微镜（TEM）图像

图5 墨粉-乙二醇苯醚纳米流体照片

图6 废弃墨粉-乙二醇苯醚纳米流体在900nm波长处吸光度随时间变化曲线

图7 废弃墨粉-乙二醇苯醚纳米流体的透射率

图8 废弃墨粉-乙二醇苯醚纳米流体的消光系数曲线

图9 墨粉纳米流体的温升随时间变化曲线

图10 废弃墨粉墨粉纳米流体的全程光热转换效率随时间变化曲线

表1 不同纳米流体光热转换实验结果对比

研究者	分散物	基液	实验最佳浓度/%	光热转换效率/%	光热转换效率比基液提高/%
Hazra等^[31]	BN/炭黑	乙二醇	0.0015	82.50	35
李富恒^[36]	石墨烯	乙二醇	0.0007	76.36	49.65
Guo等^[19]	碳纳米管	水	0.01	65	51.16
Li等^[20]	β-环糊精碳纳米管	乙二醇	0.1	81.30	64.24
Tong等^[25]	碳纳米管/Fe₃O₄	水	0.05	46	76.92
本研究	废弃墨粉	乙二醇苯醚	0.04	54.95	90.41

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