Jeong Hoseong, Jung Byung Jun, Kim Jae Hyun, Choi Seung-Ho, Lee Yoon Jung, Kim Kang Su
Department of Architectural Engineering and Smart City Interdisciplinary Major Program, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Republic of Korea.
Department of Materials Science and Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemun-gu, Seoul 02504, Republic of Korea.
R Soc Open Sci. 2022 Mar 16;9(3):211660. doi: 10.1098/rsos.211660. eCollection 2022 Mar.
Acid spills cause large-scale environmental damage and casualties. To respond to such incidents, a sensor capable of detecting acid leaks is required. Cellulose is a useful substrate material for the fast detection of acid leaks because it has high hydrophilicity and porosity. On the other hand, methods of manufacturing cellulose-based sensors are still complicated or time-consuming. Thus, in this study, a simple and rapid synthesis method for a cellulose-based pH sensor was proposed. The functionalization of α-cellulose was achieved via chloroacetyl chloride, and Congo red was covalently immobilized to the functionalized cellulose for detecting strong acids. The manufacturing process was composed of two steps as above and finished within 8 h. The developed sensor exhibited absorbance changes in the pH range of 0.2 to 3.0, and response time was shorter than 1 s. A prototype system using this sensor was manufactured and tested, and it detected acid leaks easily and quickly.
酸泄漏会造成大规模的环境破坏和人员伤亡。为应对此类事件，需要一种能够检测酸泄漏的传感器。纤维素因其具有高亲水性和孔隙率，是用于快速检测酸泄漏的有用基底材料。另一方面，基于纤维素的传感器的制造方法仍然复杂或耗时。因此，在本研究中，提出了一种基于纤维素的pH传感器的简单快速合成方法。通过氯乙酰氯实现了α-纤维素的功能化，并且将刚果红共价固定在功能化纤维素上以检测强酸。制造过程由上述两个步骤组成，并且在8小时内完成。所开发的传感器在pH值0.2至3.0范围内呈现吸光度变化，响应时间短于1秒。使用该传感器的原型系统被制造并进行了测试，它能够轻松快速地检测酸泄漏。
