| Popis: |
The puffing glutinous rice starch (PGRS) could be obtained by adding glutinous broken 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. 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 to prepare corrugated cardboard case adhesive, stamp envelope adhesive, wallpaper adhesive and dry mortar internal wall paint. |
