水解交联改性的聚丙烯酰胺的吸水保肥能力研究

研究聚丙烯酰胺（PAM）的水解，并对其结构进行了表征。研究了二醛交联的聚丙烯酰胺及其水解产物对水、肥的吸收及保持能力，结果表明，聚丙烯酰胺水解交联后，部分胺基转化为羧基和羟基。由于羧基、羟基和胺基的协同作用，对水和肥的保持、吸收能力大大增强。水解4h的产物PAM-4中羧基、羟基和胺基的协同作用最好，对水和肥的保持、吸收能力最强。与乙二醛交联的PAM-4相比，戊二醛交联的PAM-4因可以有更大的网络伸展空间，水和肥的保持、吸收能力更强。戊二醛交联的PAM-4对CO（NH2）2有较大的吸收容量。

Study on absorbability and retentivity of crosslinked polyacrylamide and its modified products to water and fertilizer

Hydrolysis of polyacrylamide(PAM) was researched.The structures of PAM and its hydrolysate were characterizated with FTIR and ~(1)H NMR.The absorbability and retentivity of crosslinked polyacrylamide and its modified products to water and fertilizer were investigated.The results showed that,working in coordination with-CONH_(2,)-COO~(-)and-OH,the absorbability and retentivity of hydrolysates of PAM to water increased.The hydrolysate(PAM-4) deriued from 4 h hydrolysis of PAM had the best synergic effect of CONH_(2,)-COO~(-)and-OH,and possessed the best absorbability and retentivity to water.For cross-linking reagent,compared with glyoxal,glutaraldehyde was better because polymer net can expand more space with glutaraldehyde was cross-linking reagent.For fertilizer absorbability,compared with NH_(4)NO_(3),the product which came from PAM-4 crosslinked with glutaraldehyde was much better to CO(NH_(2))_(2).