Water-retention slow-release type hemicellulose-based hydrogel as well as preparation method and application thereof

• Main Authors: LIANG CHEN, LUO YADAN, YAO SHUANGQUAN, HOU YAJUN, LIU BAOJIE, QIN CHENGRONG, ZENG FANYAN, YAO MINGZHU, DENG BAOJUAN
• Format: Patent
• Language: Chinese; English
• Published: 05.12.2023
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; NITROGENOUS FERTILISERS; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention relates to the technical field of wood fiber biomass high-value utilization, in particular to water-retention slow-release type hemicellulose-based hydrogel as well as a preparation method and application thereof. Aiming at the problems of low hemicellulose yield, poor mechanical property of hemicellulose-based hydrogel and the like in traditional hydrothermal pretreatment separation, efficient separation of hemicellulose in poplar is realized by utilizing a Fe < 3 + > composite buffer solution hydrothermal pretreatment technology, and chitosan-iron ions are introduced into a hemicellulose-based hydrogel system, so that the hemicellulose-based hydrogel is prepared. The hemicellulose-chitosan-iron ion hydrogel is prepared through covalent bond crosslinking and ionic bond crosslinking to improve the mechanical property and the water retention property of the traditional hemicellulose hydrogel, and the hemicellulose-based hydrogel with good water retention property and good mechanical property is o