摘要
以双醛淀粉为交联剂,采用溶液交联的方法对明胶进行交联改性。研究了反应条件对交联明胶吸水性能的影响。结果表明,交联明胶吸水能力随双醛淀粉/明胶增加而先增加后降低,随反应温度增加而减小,随反应混合物pH值增加而增加。当pH=2,温度为90℃,双醛淀粉/明胶=0.3,明胶溶液浓度为20%时,明胶的吸水倍率可降低至1.62。FTIR显示双醛淀粉对明胶的交联作用主要是形成希夫碱结构。
Cross-linked gelatin was prepared with dialdehyde starch as crosslinking agent in aqueous solution. The effect of reaction conditions on water absorption of cross-linked gelatin was investegated. It was observed that the water adsorption capacity of dialdehyde starch cross-linked gelatin decreased with increasing dialdehyde starch/gelatin ratio, temperature and pH. A minimized water absorption capacity of 1.62 was achieved at optimized conditions of pH = 2, 90℃, while dialdehyde starch/gelatin= 0. 3 in 20% gelatin solution. The reaction between gelatin and dialdehyde starch has been characterized by the formation of schiff's base between dialdehyde starch and gelatin in FTIR spectrum.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2008年第2期232-234,276,共4页
Journal of Materials Science and Engineering
基金
乐山师范学院青年教师科研启动资助项目
关键词
明胶
双醛淀粉
溶液交联
吸水量
gelatin
dialdehyde starch
solution crosslinking
water absorbtion capacity