CN115787286A - Preparation method of conductive cotton fabric for electromagnetic shielding - Google Patents
Preparation method of conductive cotton fabric for electromagnetic shielding Download PDFInfo
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Abstract
Description
技术领域technical field
本发明涉及电磁屏蔽技术领域，尤其涉及一种用于电磁屏蔽的导电棉织物的制备方法。The invention relates to the technical field of electromagnetic shielding, in particular to a method for preparing a conductive cotton fabric used for electromagnetic shielding.
背景技术Background technique
电磁屏蔽用来保护电子设备和工作空间免受其他电子设备和通信仪器发出的电磁辐射干扰，对精密电子设备和工作空间的正常工作有着重要意义。目前最常用的电磁屏蔽方法是采用坡莫合金加工为适用的金属罩并通过高温退火处理获得电磁屏蔽罩进行电磁屏蔽，存在着加工困难、成本高的问题。与金属电磁屏蔽相比，基于导电织物的电磁屏蔽材料可以覆盖和保护适合其形状和尺寸的电线和电子设备等物体，导电织物的制备方法可以参考申请号为CN202010483825.9、名称为具有高吸收特性的电磁屏蔽与疏水功能织物及其制备方法的中国发明专利。目前，导电织物普遍具有加工复杂、电磁屏蔽效果差的问题。Electromagnetic shielding is used to protect electronic equipment and workspaces from electromagnetic radiation interference from other electronic equipment and communication instruments, and is of great significance to the normal operation of precision electronic equipment and workspaces. At present, the most commonly used electromagnetic shielding method is to process permalloy into a suitable metal cover and obtain an electromagnetic shielding cover through high-temperature annealing treatment for electromagnetic shielding, which has the problems of difficult processing and high cost. Compared with metal electromagnetic shielding, electromagnetic shielding materials based on conductive fabrics can cover and protect objects such as wires and electronic equipment suitable for their shapes and sizes. The preparation method of conductive fabrics can refer to the application number CN202010483825. The Chinese invention patent of the characteristic electromagnetic shielding and hydrophobic functional fabric and its preparation method. At present, conductive fabrics generally have the problems of complex processing and poor electromagnetic shielding effect.
发明内容Contents of the invention
本发明所要解决的技术问题是：提供一种电磁屏蔽效果好、成本低的用于电磁屏蔽的导电棉织物的制备方法。The technical problem to be solved by the present invention is to provide a method for preparing a conductive cotton fabric for electromagnetic shielding with good electromagnetic shielding effect and low cost.
为了解决上述技术问题，本发明采用的技术方案为：一种用于电磁屏蔽的导电棉织物的制备方法，包括步骤：制备聚多巴胺棉织物和单壁碳纳米管墨水，将聚多巴胺棉织物浸入单壁碳纳米管墨水，获得导电棉织物。In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a preparation method of conductive cotton fabric for electromagnetic shielding, comprising the steps of: preparing polydopamine cotton fabric and single-walled carbon nanotube ink, immersing polydopamine cotton fabric into Single-walled carbon nanotube inks to obtain conductive cotton fabrics.
进一步地，具体包括步骤S1：Further, it specifically includes step S1:
制备1M Tris-HCl缓冲溶液，将1M Tris-HCl缓冲溶液与3-羟基酪胺盐酸盐混合制备聚多巴胺溶液，在棉纤维上涂覆聚多巴胺溶液得到聚多巴胺棉织物。Prepare 1M Tris-HCl buffer solution, mix 1M Tris-HCl buffer solution with 3-hydroxytyramine hydrochloride to prepare polydopamine solution, coat polydopamine solution on cotton fiber to obtain polydopamine cotton fabric.
进一步地，所述步骤S1具体包括步骤S11：Further, the step S1 specifically includes step S11:
将(羟甲基)氨基甲烷和去离子水按0.24～0.3g/mL的配比为溶液，向溶液中加入和去离子水同体积的盐酸得到1M Tris-HCl缓冲溶液。(Hydroxymethyl)aminomethane and deionized water are prepared as a solution at a ratio of 0.24 to 0.3 g/mL, and hydrochloric acid having the same volume as the deionized water is added to the solution to obtain a 1M Tris-HCl buffer solution.
进一步地，所述步骤S1具体包括步骤S12：Further, the step S1 specifically includes step S12:
将3-羟基酪胺盐酸盐和1M Tris-HCl缓冲溶液按1∶4～5的体积比配比混合，得到聚多巴胺溶液。The polydopamine solution is obtained by mixing 3-hydroxytyramine hydrochloride and 1M Tris-HCl buffer solution at a volume ratio of 1:4-5.
进一步地，所述步骤S1具体包括步骤S13：Further, the step S1 specifically includes step S13:
将棉织物在室温下浸入聚多巴胺溶液中1～2天，得到涂有聚多巴胺溶液的棉织物。The cotton fabric is soaked in the polydopamine solution at room temperature for 1-2 days to obtain the cotton fabric coated with the polydopamine solution.
进一步地，所述步骤S1具体包括步骤S14：Further, the step S1 specifically includes step S14:
将涂有聚多巴胺溶液的棉织物在去离子水中漂洗30～40分钟，并在室温下干燥1天，获得聚多巴胺棉织物。The cotton fabric coated with the polydopamine solution was rinsed in deionized water for 30-40 minutes, and dried at room temperature for 1 day to obtain the polydopamine cotton fabric.
进一步地，具体包括步骤S2：Further, it specifically includes step S2:
将单壁碳纳米管和N,N-二甲基甲酰胺配比，获得单壁碳纳米管墨水。Single-wall carbon nanotube ink is obtained by mixing single-wall carbon nanotubes and N,N-dimethylformamide.
进一步地，所述步骤S2具体为：Further, the step S2 is specifically:
将单壁碳纳米管和N,N-二甲基甲酰胺(DMF)按0.1wt％的比例配比，再通过微型超声均质器分散单壁碳纳米管2～3小时后，获得单壁碳纳米管墨水。Single-walled carbon nanotubes and N,N-dimethylformamide (DMF) are mixed at a ratio of 0.1 wt%, and single-walled carbon nanotubes are dispersed by a micro-ultrasonic homogenizer for 2 to 3 hours to obtain single-walled carbon nanotubes carbon nanotube ink.
进一步地，具体包括步骤S3：Further, it specifically includes step S3:
将聚多巴胺棉织物和单壁碳纳米管墨水放入浴型超声波仪中浸泡预设时间，再将聚多巴胺棉织物取出烘干，重复浸泡和烘干步骤预设次数后，获得导电棉织物。The polydopamine cotton fabric and the single-walled carbon nanotube ink are soaked in a bath-type ultrasonic instrument for a preset time, then the polydopamine cotton fabric is taken out and dried, and the soaking and drying steps are repeated for a preset number of times to obtain a conductive cotton fabric.
进一步地，所述步骤S3具体为：Further, the step S3 is specifically:
将单壁碳纳米管墨水放入温度设置为15-20℃浴型超声波仪中，然后将聚多巴胺棉织物浸入浴型超声波仪中的单壁碳纳米管墨水，浸泡20～30分钟，取出聚多巴胺棉织物进行烘干，重复浸泡和烘干步骤三次后获得导电棉织物。Put the single-wall carbon nanotube ink into the bath-type ultrasonic instrument with the temperature set at 15-20°C, then immerse the polydopamine cotton fabric in the single-wall carbon nanotube ink in the bath-type ultrasonic instrument, soak for 20-30 minutes, and take out the polydopamine cotton fabric. The dopamine cotton fabric was dried, and the conductive cotton fabric was obtained after repeating the steps of soaking and drying three times.
本发明的有益效果在于：提供一种用于电磁屏蔽的导电棉织物的制备方法，通过将聚多巴胺棉织物浸入单壁碳纳米管墨水获得导电棉织物，测得电磁屏蔽效率约为-30dB，提高了电磁屏蔽效果，克服了现有技术中在电磁屏蔽材料的制备上存在的加工困难、成本高、电磁屏蔽效果差的问题，本发明所采用的方法具有加工简单、效率高以及成本低的优点，获得的材料电磁屏蔽效果好，实用性佳。The beneficial effect of the present invention is: provide a kind of preparation method of the conductive cotton fabric that is used for electromagnetic shielding, obtain conductive cotton fabric by immersing polydopamine cotton fabric in single-wall carbon nanotube ink, the measured electromagnetic shielding efficiency is about -30dB, The electromagnetic shielding effect is improved, and the problems of processing difficulty, high cost and poor electromagnetic shielding effect in the preparation of electromagnetic shielding materials in the prior art are overcome. The method adopted in the present invention has the advantages of simple processing, high efficiency and low cost. Advantages, the obtained material has good electromagnetic shielding effect and good practicability.
附图说明Description of drawings
图1为本发明的导电棉织物制备方法的流程示意图。Fig. 1 is the flow diagram of the preparation method of conductive cotton fabric of the present invention.
具体实施方式Detailed ways
为详细说明本发明的技术内容、所实现目的及效果，以下结合实施方式并配合附图予以说明。In order to describe the technical content, achieved goals and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments and accompanying drawings.
本发明提供一种导电棉织物制备方法，用于电磁屏蔽。The invention provides a preparation method of conductive cotton fabric, which is used for electromagnetic shielding.
请参照图1，一种用于电磁屏蔽的导电棉织物的制备方法，包括步骤：制备聚多巴胺棉织物和单壁碳纳米管墨水，将聚多巴胺棉织物浸入单壁碳纳米管墨水，获得导电棉织物。Please refer to Fig. 1, a kind of preparation method of the conductive cotton fabric that is used for electromagnetic shielding, comprises steps: prepare polydopamine cotton fabric and single-wall carbon nanotube ink, polydopamine cotton fabric is immersed in single-wall carbon nanotube ink, obtains conductive cotton fabric.
从上述描述可知，本发明的有益效果在于：提供一种用于电磁屏蔽的导电棉织物的制备方法，通过将聚多巴胺棉织物浸入单壁碳纳米管墨水获得导电棉织物，测得电磁屏蔽效率约为-30dB，提高了电磁屏蔽效果，克服了现有技术中在电磁屏蔽材料的制备上存在的加工困难、成本高、电磁屏蔽效果差的问题，本发明所采用的方法具有加工简单、效率高以及成本低的优点，获得的材料电磁屏蔽效果好，实用性佳。As can be seen from the above description, the beneficial effect of the present invention is: provide a kind of preparation method of the conductive cotton fabric that is used for electromagnetic shielding, obtain conductive cotton fabric by immersing polydopamine cotton fabric into single-wall carbon nanotube ink, measure electromagnetic shielding efficiency It is about -30dB, which improves the electromagnetic shielding effect and overcomes the problems of processing difficulty, high cost and poor electromagnetic shielding effect in the preparation of electromagnetic shielding materials in the prior art. The method adopted in the present invention has the advantages of simple processing and high efficiency. The advantages of high cost and low cost, the obtained material has good electromagnetic shielding effect and good practicability.
在可选实施例中，具体包括步骤S1：In an optional embodiment, specifically step S1 is included:
制备1M Tris-HCl缓冲溶液，将1M Tris-HCl缓冲溶液与3-羟基酪胺盐酸盐混合制备聚多巴胺溶液，在棉纤维上涂覆聚多巴胺溶液得到聚多巴胺棉织物。Prepare 1M Tris-HCl buffer solution, mix 1M Tris-HCl buffer solution with 3-hydroxytyramine hydrochloride to prepare polydopamine solution, coat polydopamine solution on cotton fiber to obtain polydopamine cotton fabric.
在可选实施例中，所述步骤S1具体包括步骤S11：In an optional embodiment, the step S1 specifically includes step S11:
将(羟甲基)氨基甲烷和去离子水按0.24～0.3g/mL的配比为溶液，向溶液中加入和去离子水同体积的盐酸得到1M Tris-HCl缓冲溶液。(Hydroxymethyl)aminomethane and deionized water are prepared as a solution at a ratio of 0.24 to 0.3 g/mL, and hydrochloric acid having the same volume as the deionized water is added to the solution to obtain a 1M Tris-HCl buffer solution.
在可选实施例中，所述步骤S1具体包括步骤S12：In an optional embodiment, the step S1 specifically includes a step S12:
将3-羟基酪胺盐酸盐和1M Tris-HCl缓冲溶液按1∶4～5的体积比配比混合，得到聚多巴胺溶液。The polydopamine solution is obtained by mixing 3-hydroxytyramine hydrochloride and 1M Tris-HCl buffer solution at a volume ratio of 1:4-5.
在可选实施例中，所述步骤S1具体包括步骤S13：In an optional embodiment, the step S1 specifically includes step S13:
将棉织物在室温下浸入聚多巴胺溶液中1～2天，得到涂有聚多巴胺溶液的棉织物。The cotton fabric is soaked in the polydopamine solution at room temperature for 1-2 days to obtain the cotton fabric coated with the polydopamine solution.
在可选实施例中，所述步骤S1具体包括步骤S14：In an optional embodiment, the step S1 specifically includes step S14:
将涂有聚多巴胺溶液的棉织物在去离子水中漂洗30～40分钟，并在室温下干燥1天，获得聚多巴胺棉织物。The cotton fabric coated with the polydopamine solution was rinsed in deionized water for 30-40 minutes, and dried at room temperature for 1 day to obtain the polydopamine cotton fabric.
在可选实施例中，具体包括步骤S2：In an optional embodiment, specifically step S2 is included:
将单壁碳纳米管和N,N-二甲基甲酰胺配比，获得单壁碳纳米管墨水。Single-wall carbon nanotube ink is obtained by mixing single-wall carbon nanotubes and N,N-dimethylformamide.
在可选实施例中，所述步骤S2具体为：In an optional embodiment, the step S2 is specifically:
将单壁碳纳米管和N,N-二甲基甲酰胺(DMF)按0.1wt％的比例配比，再通过微型超声均质器分散单壁碳纳米管2～3小时后，获得单壁碳纳米管墨水。Single-walled carbon nanotubes and N,N-dimethylformamide (DMF) are mixed at a ratio of 0.1 wt%, and single-walled carbon nanotubes are dispersed by a micro-ultrasonic homogenizer for 2 to 3 hours to obtain single-walled carbon nanotubes carbon nanotube ink.
在可选实施例中，具体包括步骤S3：In an optional embodiment, specifically step S3 is included:
将聚多巴胺棉织物和单壁碳纳米管墨水放入浴型超声波仪中浸泡预设时间，再将聚多巴胺棉织物取出烘干，重复浸泡和烘干步骤预设次数后，获得导电棉织物。The polydopamine cotton fabric and the single-walled carbon nanotube ink are soaked in a bath-type ultrasonic instrument for a preset time, then the polydopamine cotton fabric is taken out and dried, and the soaking and drying steps are repeated for a preset number of times to obtain a conductive cotton fabric.
在可选实施例中，所述步骤S3具体为：In an optional embodiment, the step S3 is specifically:
将单壁碳纳米管墨水放入温度设置为15-20℃浴型超声波仪中，然后将聚多巴胺棉织物浸入浴型超声波仪中的单壁碳纳米管墨水，浸泡20～30分钟，取出聚多巴胺棉织物进行烘干，重复浸泡和烘干步骤三次后获得导电棉织物。Put the single-wall carbon nanotube ink into the bath-type ultrasonic instrument with the temperature set at 15-20°C, then immerse the polydopamine cotton fabric in the single-wall carbon nanotube ink in the bath-type ultrasonic instrument, soak for 20-30 minutes, and take out the polydopamine cotton fabric. The dopamine cotton fabric was dried, and the conductive cotton fabric was obtained after repeating the steps of soaking and drying three times.
请参照图1，本发明的实施例一为：Please refer to Fig. 1, embodiment one of the present invention is:
一种用于电磁屏蔽的导电棉织物制备方法：A preparation method of conductive cotton fabric for electromagnetic shielding:
S1、制备聚多巴胺(PDA)棉织物；S1, prepare polydopamine (PDA) cotton fabric;
S2、制备单壁碳纳米管(SWCNT)墨水；S2, preparing single-walled carbon nanotube (SWCNT) ink;
S3、制备导电棉织物。S3, preparing conductive cotton fabric.
步骤S1的具体操作为：The specific operation of step S1 is:
S101、制备1M Tris-HCl缓冲溶液，具体方法是：将(羟甲基)氨基甲烷(Tris)和去离子水按0.24-0.3g/mL的配比将Tris溶解在去离子水中，往溶液中加入和去离子水同体积的盐酸(HCl)制备成1M Tris-HCl缓冲溶液；S101, preparing 1M Tris-HCl buffer solution, the specific method is: (Hydroxymethyl)aminomethane (Tris) and deionized water are dissolved in deionized water according to the ratio of 0.24-0.3g/mL, and poured into the solution Add hydrochloric acid (HCl) with the same volume as deionized water to prepare a 1M Tris-HCl buffer solution;
制备的1M Tris-HCl缓冲溶液的Ph值为8-8.5；The pH value of the prepared 1M Tris-HCl buffer solution is 8-8.5;
S102、制备聚多巴胺(PDA)溶液，具体方法为：将3-羟基酪胺盐酸盐和步骤S101制备的1M Tris-HCl缓冲溶液按体积比1:5-1:4配比并混合，制备成PDA溶液；S102, preparing a polydopamine (PDA) solution, the specific method is: 3-hydroxytyramine hydrochloride and the 1M Tris-HCl buffer solution prepared in step S101 are mixed in a volume ratio of 1:5-1:4 to prepare into PDA solution;
S103、在棉纤维上涂覆步骤S102制备的PDA溶液，具体方法为：将棉织物在室温下浸入PDA溶液中1-2天，以在表面上涂覆PDA；然后，将涂有PDA的棉织物在去离子水中漂洗30-40分钟，并在室温下干燥1天，获得PDA棉织物；S103. Coating the PDA solution prepared in step S102 on the cotton fiber, the specific method is: immerse the cotton fabric in the PDA solution at room temperature for 1-2 days to coat the PDA on the surface; then, the cotton fabric coated with PDA The fabric was rinsed in deionized water for 30-40 minutes, and dried at room temperature for 1 day to obtain a PDA cotton fabric;
棉纤维的厚度为0.15-0.25mm厚，成分为100％棉；The thickness of cotton fiber is 0.15-0.25mm thick, and the composition is 100% cotton;
步骤S2的具体操作为：将单壁碳纳米管(SWCNT)和N,N-二甲基甲酰胺(DMF)按0.1wt％配比并将SWCNT放入DMF，随后用微型超声均质器分散SWCNT2-3小时，获得SWCNT墨水；The specific operation of step S2 is: single-walled carbon nanotubes (SWCNT) and N,N-dimethylformamide (DMF) are mixed according to 0.1wt% ratio and SWCNT is put into DMF, then disperse with micro-ultrasonic homogenizer SWCNT 2-3 hours, get SWCNT ink;
步骤S3的具体操作为：将步骤S2获得SWCNT墨水放入浴型超声波仪中，温度设置为15-20℃，然后将步骤S1获得的PDA棉织物浸入浴型超声波仪中的SWCNT墨水，浸泡时间为20-30分钟；取出PDA棉织物，干燥10-20分钟，放入烘箱，在160-180℃的温度下烘干20-30分钟；重复浸泡、烘干过程三次，获得涂覆有SWCNT的导电棉织物；The specific operation of step S3 is as follows: put the SWCNT ink obtained in step S2 into a bath-type ultrasonic instrument, and set the temperature to 15-20 ° C, then immerse the PDA cotton fabric obtained in step S1 into the SWCNT ink in the bath-type ultrasonic instrument, and the soaking time is 20-30 minutes; take out the PDA cotton fabric, dry it for 10-20 minutes, put it in an oven, and dry it at a temperature of 160-180°C for 20-30 minutes; repeat the soaking and drying process three times to obtain a conductive fabric coated with SWCNT cotton fabric;
PDA的作用是让SWCNT更紧密地附着在棉织物上；The role of PDA is to make SWCNT more tightly attached to the cotton fabric;
制备的导电棉织物的导电性由SWCNT实现；The conductivity of the prepared conductive cotton fabric is realized by SWCNT;
由于制备的导电棉织物具有导电性，从而实现了电磁屏蔽功能。Since the prepared conductive cotton fabric has conductivity, the electromagnetic shielding function is realized.
根据本实施例制备的导电棉织物，使用波导和矢量网络分析仪(VNA)在两个频率范围(4-6和8-12GHz)中测量获得的导电棉织物的电磁屏蔽效率，测得的电磁屏蔽效率约为-30dB，满足实际的电磁屏蔽要求(实际的电子设备的电磁屏蔽要求为-20dB)，验证了本发明提出的方法的优异性。According to the conductive cotton fabric prepared in this embodiment, the electromagnetic shielding efficiency of the conductive cotton fabric obtained was measured in two frequency ranges (4-6 and 8-12GHz) using a waveguide and a vector network analyzer (VNA), and the measured electromagnetic The shielding efficiency is about -30dB, which meets the actual electromagnetic shielding requirement (the electromagnetic shielding requirement of the actual electronic equipment is -20dB), and verifies the superiority of the method proposed by the present invention.
综上所述，本发明提供一种用于电磁屏蔽的导电棉织物的制备方法，通过将聚多巴胺棉织物浸入单壁碳纳米管墨水获得导电棉织物，测得电磁屏蔽效率约为-30dB，提高了电磁屏蔽效果，克服了现有技术中在电磁屏蔽材料的制备上存在的加工困难、成本高、电磁屏蔽效果差的问题，本发明所采用的方法具有加工简单、效率高以及成本低的优点，获得的材料电磁屏蔽效果好，实用性佳。In summary, the present invention provides a method for preparing conductive cotton fabrics for electromagnetic shielding. The conductive cotton fabrics are obtained by immersing polydopamine cotton fabrics in single-wall carbon nanotube inks. The electromagnetic shielding efficiency is about -30dB. The electromagnetic shielding effect is improved, and the problems of processing difficulty, high cost and poor electromagnetic shielding effect in the preparation of electromagnetic shielding materials in the prior art are overcome. The method adopted in the present invention has the advantages of simple processing, high efficiency and low cost. Advantages, the obtained material has good electromagnetic shielding effect and good practicability.
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等同变换，或直接或间接运用在相关的技术领域，均同理包括在本发明的专利保护范围内。The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in related technical fields, are all included in the same principle. Within the scope of patent protection of the present invention.
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