Development of Molecular Imprinting Polymers ofPhthalate Esters and Air Sampling Tests

• Main Authors: Chi-KaiLin, 林鉅凱
• Other Authors: Ta-Chang Lin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/32638496555734849955

碩士 === 國立成功大學 === 環境工程學系碩博士班 === 100 === Phthalates esters (PAEs) are mainly used as plasticizers to enhance the flexibility of polyvinylchloride (PVC), which helps with shaping PVC products more easily. Since plasticizers are not chemically bound onto the PVC structure or other matrices, they leach out or evaporate into the atmosphere during production. Rivers can be contaminated due to discharge by the plastic factories or plastic wastes. Despite the low volatility of PAEs, they are still found in indoor air, especially inside most plastic factories. In this study, dibutylphthalate (DBP) and dimethyl phalate (DMP) were selected as the templates of molecular imprinting polymers (MIPs). In material characteristics trials, four different ratios of template, functional monomer (methacrylic acid, MAA), cross-linker (ethylene glycol dimethacrylate, EDMA) and the initiator (2,2-azobis(2-isobutyronitrile), AIBN) of MIPs, as well as the corresponding molecular imprinting polymers without template (NIPs) were synthesized. MIPs were tested for their capacity, imprinting factor (IF), SEM characteristics, recovery and selectivity of MISPE. Finally, the MIP with the best recovery among 14 PAEs was chosen for the gasification and sampling test of phthalate ester. In addition, the sampling efficiency were compared with that from the OSHA Method 104. The experimental results suggest that MA-1 had the best imprinting factor(1.43), MA-4 had the best capacity of 48.22 μg of DMP, and the capacity of MB-1 was 12.45 μg/g . The selectivity tests showed that MA-4 could adsorb each phthalate esters, and the recovery of first class of hazardous chemicals in Taiwan EPA were 74.1%, 115.4%, 117.7%, 133.8%, 99.4%, 105.6% (DMP, DEP, DBP, BBP, DEHP, DNOP). Sampling of phthalate esters in a chamber with MISPE (MA-4) revealed that the sampling efficiency of MISPE was not higher than that of OVS-Tenax. However, it did give good efficiency on DEP, DIBP, DBP (75.1%, 93.6%, 86%).