Modified Huai Potato Starch Prepolymer and Degradable Polyurethane Foam Material Prepared with the Prepolymer

Abstract

The invention discloses a modified dioscorea opposita thunb starch prepolymer and a degradable polyurethane foam material prepared from the prepolymer. A preparation method of the modified dioscorea opposita thunb prepolymer comprises the following steps: (1) putting polyisocyanate and polycaprolactone, the molar ratio of which is 2: 1, into a container, reacting at the temperature of 80+ / -2 DEG C for 3-5 hours, and then degrassing under a negative pressure till bubbles do not exist, thus obtaining a polycaprolactone prepolymer; and (2) dissolving modified dioscorea opposita thunb starch and the polycaprolactone prepolymer in a dimethylsulfoxide solution at the temperature of 60-70 DEG C, then adding a catalyst NaCNBH3, reacting for 2-3 days under a stirring condition, after ending reaction, cooling obtained mixed liquid to a room temperature, then dropwise adding the mixed liquid to methyl alcohol under a stirring condition so as to form precipitates, filtering to obtain the precipitates, and drying under reduced pressure so as to obtain the modified dioscorea opposita thunb starch prepolymer.

Description

technical field

[0001] The invention relates to a polyurethane material, in particular to a biodegradable polyurethane foam material containing modified potato starch. Background technique

[0002] Polyurethane materials are widely used for their excellent mechanical strength, high elasticity, wear resistance, lubricity, fatigue resistance, biocompatibility, processability, etc., and the demand is increasing at an annual growth rate of 10%. However, polyurethane cannot be degraded in the natural state, which has caused more and more severe environmental pressure. All countries in the world have invested a lot of scientific and technological strength in the research of degradable polyurethane. As a biodegradable material in renewable resources, it has adapted to The environmental requirements of environmental protection and sustainable development and the requirements of low-carbon economic growth have become the research hotspots of researchers from all over the world. [0...