Comprehensive evaluation model for health grade of multi-component compound release materials based on fuzzy comprehensive evaluation with grey relational analysis

The selection of materials is a complex and elusive process due to the multiple factors related to health. For the effective selection of materials, a comprehensive model for evaluating the health grade of materials was proposed with the mathematical method of the fuzzy comprehensive evaluation (FCE) and grey relational analysis (GRA). A health evaluation procedure scheme of the AgBB as well as standards of the forestry industry of the People's Republic of China and standards of the health industry of the People's Republic of China were referred to during the process. Based on Qt technology, a computer program was developed to calculate the compound comprehensive evaluation models. The data of Choerospondias axillaris with different lacquers were used as practical examples firstly, and then, the emission and odor characteristics of Xylosma racemosum (Sieb. et Zucc.) Miq. with PU, UV, and waterborne coating were explored with the technology of GC-MS/O. Results showed that: a total of 21 odorants were identified from Xylosma racemosum with PU, UV, and waterborne coating. The health grade of three Xylosma racemosum samples was UV > waterborne > PU, with the health grade of UV coating being "A", and the boards with PU and the waterborne coating were "N", with a fuzzy comprehensive index of P-PU = 0.5151, P(waterborne coatings=)0.4950. Based on the results, it is proved that the establishment of the comprehensive evaluation model based on FCE and GRA successfully converts qualitative evaluation into quantitative evaluation; in addition, effectively evaluates the health grade of materials. This study provides a better understanding of materials' health grades, which will aid consumers in reducing indoor air pollution and using their products properly.