从微生物细胞中收集生物降解塑料PHB  

Collection of Biodegradable Plastic poly β hydroxy butyrate from Microbial Cell

作　　者：刘兴利[1] 刘谦[1] 

机构地区：[1]西南民族学院,成都610041

出　　处：《塑料工业》1999年第5期45-46,共2页China Plastics Industry

摘　　要：用自制的ＮａＣｌＯ 溶液毁解生物细胞，离心分离收集ＰＨＢ，ＰＨＢ 的纯度随ＮａＣｌＯ 溶液中Ｃｌ 含量的增加而增加。以含ＰＨＢ 为４０ ％ 的生物细胞为原料，当ＮａＣｌＯ 溶液中Ｃｌ 的含量为６．９ ％ 、ｐＨ 为１１ 、处理时间为３０ ｍｉｎ 时，获得ＰＨＢ 的纯度为８９．２ ％ ，收率为９６．９ ％ 。在处理过程中，ＰＨＢ 的分子量会发生一定程度的降解，其粘均分子量 －Ｍη从３．５ ×１０５ 下降为０．４９ ×１０５ 。s After PHB containing biomass was mixed with sodium hypochlorite solution,PHB granulae were separated from the aqueous fraction containing cell debris by centrifugation.The purity of PHB was increased by increasing the content of Cl in the NaClO solution.When PHB with a cell content of 40% was used as raw material and the content of Cl in NaClO solution was 6.9%,pH value 11 and reaction time 30 min,the purity and recovery of PHB were 89.2% and 96.9% respectively.In this process,the molecular weight of PHB decreased from 3.5×10 5 to 0.49×10 5.

关 键 词：PHB 降解塑料 生物降解 微生物细胞 

分 类 号：TQ324.9[化学工程—合成树脂塑料工业]