Study on the Green Carton Packaging Adhesive

摘要

The puffing glutinous rice starch (PGRS) could be obtained by adding glutinous rice into bulking machine and expanding at a certain temperature and pressure. Compared with gelatinization by heating and adding alkali, gelatinization by puffing was easier to control and had a higher degree of starch gelation. Thermogravimetry (TG) and differential thermogravimetry (DTG) showed that the thermal stability of PGRS was improved. The starch granule disintegrated after puffing and therefore more hydrophilic hydroxyls were exposed. The water-solubility of PGRS was increased which was shown in IR spectrometry with a broad and strengthened peak of O-H stretching vibration. Scanning electron micrograph (SEM) found that the PGRS granules were in shape of rough surface, which would be a strong affinity for water. Therefore, it could be used as a kind of green adhesive.