PFOA stands for perfluorooctanoic acid and its ammonium-containing main salt, or “C8”. It is an important raw material for “three-proof finishing agents” for textiles. Perfluorooctanoic acid and its salts are also organic pollutants that are difficult to degrade. They are highly persistent in the environment. Over time, they will also accumulate in the environment and strongly accumulate in human and animal tissues, and will enter the food chain. , and may cause potential danger to human health and the environment for a long time.
However, if the EPA wants to ban or restrict its use, more scientific information is needed to conduct a risk assessment. ; The EU has not made a clear position on PFOA so far; however, many textile companies and brand textile sellers in the world have accepted the view that PFOA and its salts are potentially dangerous to the human body and the environment, and have explicitly banned it in their own chemical restrictions. Perfluorooctanoic acid and its salts, that is, it is required that perfluorooctanoic acid and its salts cannot be detected.
PFOS is called perfluorooctane sulfonyl compound (C8F17SO2X), which is the English abbreviation of perfluorooctane sulphonate. PFOS is mainly used in, oil repellent, anti- Dust agents, insecticides, surfactants, anti-fogging agents, etc. are the main active ingredients in antifouling treatment agents for textiles and leather products, and are widely used in the production of civilian and industrial products.
PFOS is extremely persistent and is the most difficult organic pollutant to decompose. It will not decompose even after being boiled in concentrated sulfuric acid for an hour. According to relevant research, no obvious degradation was found in the hydrolysis of perfluorooctane sulfonate at various temperatures and pH levels; PFOS has good stability in both oxygenated and anaerobic environments, and can be used in various Extensive research on microorganisms and conditions shows that PFOS shows no signs of degradation.
The only situation where PFOS decomposes is when it is incinerated under high temperature conditions. The EU has officially banned the use of PFOS in goods. The first to be affected will be export companies that produce textiles, leather and other products. Because PFOS has the widest range in the textile industry, any textiles that require printing, dyeing and finishing must be pre-treated and washed. In addition, additives used for functional finishing such as UV resistance and antibacterial may also contain PFOS. The directive The implementation will directly affect the export of my country’s textiles, leather, papermaking, packaging, printing and dyeing auxiliaries, cosmetics and other products.
APEO includes:
① Nonylphenol polyoxyethylene Ether (NPEO): accounting for 80~85%;
② Octylphenol polyoxyethylene ether (OPEO): accounting for more than 15%;
③ Dodecylphenol polyoxyethylene ether (DPEO): accounting for 1%;
④ Dinonylphenol polyoxyethylene ether (DNPEO): accounting for 1% %.
In order to meet the requirements of multi-functional textile finishing, organic fluorine waterproof and oil repellent agents are usually made into emulsions or dispersed suspensions. Therefore, a suitable emulsifier needs to be used. Stable. In the past, alkylphenol polyoxyethylene ether, or APEO, was mostly used. Its biodegradability is very poor and it shows strong acute toxicity. In addition, it will decompose to produce alkylphenol, which is a kind of For banned environmental hormones, the European Union has clearly prohibited alkylphenol polyoxyethylene from January 17, 2005.
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