Test paper for rapidly detecting low-concentration formaldehyde and preparation method thereof

• Main Authors: WANG PIXIN, BAI YUNGANG, WANG CHAO, XU KUN, ZHANG FAN
• Format: Patent
• Language: Chinese; English
• Published: 02.05.2023
• Subjects: IMPREGNATING OR COATING OF PAPER; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PHYSICS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TESTING; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention discloses test paper for rapidly detecting low-concentration formaldehyde and a preparation method of the test paper, and belongs to the field of functional materials. The invention provides the application of the N-vinylformamide-acrylonitrile polymer in formaldehyde detection for the first time. The test paper for rapidly detecting the low-concentration formaldehyde is prepared by mixing an N-vinylformamide-acrylonitrile polymer and paper pulp and then removing a solvent, or is prepared by loading the N-vinylformamide-acrylonitrile polymer on the surface of a blank test strip. The lowest detection limit of the test paper can reach 0.02 mg/m < 3 >, the sensitivity is relatively high, the detection conditions are simple, and portable rapid detection of formaldehyde is realized. 本发明公开了一种快速检测低浓度甲醛的试纸及其制备方法，属于功能材料领域。本发明首次提出了N-乙烯基甲酰胺-丙烯腈聚合物在甲醛检测中的应用。本发明所述的快速检测低浓度甲醛的试纸，由N-乙烯基甲酰胺-丙烯腈聚合物与纸浆混合后除去溶剂制备得到，或由N-乙烯基甲酰胺-丙烯腈聚合物负载在空白试纸条表面制备得到。所述试纸的最低检测限可达到0.02mg/m3，灵敏度较高，并且检测条件简单，实现了甲醛的便携式快速检测。