2-[(Hydroxymethyl)amino]ethanol in water as a preservative: Study of formaldehyde released by Taguchi's method

International Conference on Chemical and Bioprocess Engineering

地球科学;化学;生物科学

Wisessirikul, W.^1 ; Loykulnant, S.^2 ; Montha, S.^2 ; Fhulua, T.^3 ; Prapainainar, P.^4,5

Interdisciplinary Graduate Program in Advanced and Sustainable Environmental Engineering, Thailand Advanced Institute of Science and Technology, Tokyo Institute of Technology, Kasetsart University, Bangkok

10900, Thailand^1

Natural Rubber Focus Unit, National Metal and Materials Technology Center, NSTDA, 111 Paholyothin Rd., Klong 1, Klong Luang, Pathumthani

12120, Thailand^2

Environment Research Unit, National Metal and Materials Technology Center, NSTDA, 111 Paholyothin Rd., Klong 1, Klong Luang, Pathumthani

12120, Thailand^3

National Center of Excellence for Petroleum, Petrochemicals and Advance Materials, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Thailand^4

Center of Excellence of Nanotechnology, Kasetsart University, Thailand^5

关键词: Free formaldehydes;    Long-term storage;    Natural rubber latex;    Orthogonal array;    pH value;    Statistical calculations;    Suitable conditions;    Taguchi's methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/36/1/012049/pdf
DOI  :  10.1088/1755-1315/36/1/012049

学科分类：生物科学（综合）

来源: IOP

【 摘 要 】

This research studied the quantity of free formaldehyde released from 2- [(hydroxymethyl)amino]ethanol (HAE) in DI water and natural rubber latex mixture using high-performance liquid chromatography (HPLC) technique. The quantity of formaldehyde retained in the solution was cross-checked by using titration technique. The investigated factors were the concentration of preservative (HAE), pH, and temperature. Taguchi's method was used to design the experiments. The number of experiments was reduced to 16 experiments from all possible experiments by orthogonal arrays (3 factors and 4 levels in each factor). Minitab program was used as a tool for statistical calculation and for finding the suitable condition for the preservative system. HPLC studies showed that higher temperature and higher concentration of the preservative influence the amount of formaldehyde released. It was found that conditions at which formaldehyde was released in the lowest amount were 1.6%w/v HAE, 4 to 40 °C, and the original pH. Nevertheless, the pH value of NR latex should be more than 10 (the suitable pH value was found to be 13). This preservative can be used to replace current preservative systems and can maintain the quality of latex for long-term storage. Use of the proposed preservative system was also shown to have reduced impact on the toxicity of the environment.