摘要
以甘氨酸和质量分数36%盐酸为原料合成出甘氨酸盐酸盐离子液体,利用间歇碱处理方式对壳聚糖原料进行处理,制备出脱乙酰度可达92.2%的高脱乙酰度壳聚糖。采用N-烷基化化学改性方法,使苯甲醛与高脱乙酰度壳聚糖分别在乙酸和甘氨酸盐酸盐离子液体两种溶剂中进行反应,制备N-苄基壳聚糖。红外光谱测试表明:由这两种方法制备出的产物均为N-苄基壳聚糖,证明了甘氨酸盐酸盐离子液体是壳聚糖的良溶剂。用偏光显微镜测得N-苄基壳聚糖在二氯乙酸中形成液晶相的临界质量分数为10.0%,形成的液晶相为胆甾相。
Glycine hydrochloride ionic liquid was synthesized using glycine and 36% hydrochloric acid by mass fraction as raw materials. A high-deacetylation degree chitosan with the deacetylation degree up to 92.2% was prepared from ehitosan raw material by intermittent alkali treatment. N-benzyl chitosan was produced from benzaldehyde and high-deacetylation degree chitosan in presence of acetic acid or glycine hydrochloride ionic liquid by N-alkylation chemical modification. The infrared spectrometry resuits showed that N-benzyl chitosan was the products via these two methods. Glycine hydrochloride ionic liquid was proved to be a good solvent for chitosan. The critical mass fraction of N-benzyl chitosan was measured as 10.0% for liquid crystal phase formation in dichloro acetic acid by polarizing microscopy. The liquid crystal was of cholesteric phase.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2011年第2期7-10,共4页
China Synthetic Fiber Industry
关键词
壳聚糖
离子液体
N-苄基壳聚糖
溶致液晶
临界浓度
chitosan
ionic liquid
N-benzyl chitosan
lyotropic liquid crystal
critical cencentration