Dialkyl quaternary ammonium salts can be used as fabric softeners with high performance, their biodegradation can be improved by inducing unsaturated bond into their alkyl chain.

• 摘要双烷基季铵盐类产品是一种性能优良的织物柔软剂，如果在烷基链中引入不饱和键，就会提高其生物降解性。