| 摘要: |
| 为缓解我国北方局部地区耕地土壤水分流失和作物盐胁迫的问题，开发一种具有保水耐盐、可降解的绿色环保型高吸水性树脂。以四硼酸钠为硼源，木糖醇为主配位体，氢氧化钠为催化剂，在水与丙三醇复配的溶剂中恒温络合制备出多羟基有机硼交联剂；以纤维素为骨架，以丙烯酸、丙烯酰胺和2-丙烯酰氨基-2-甲基-1-丙烷磺酸为复合功能单体，使亲水集团多样化以增强耐盐性能，加入自制有机硼交联剂进行交联，使用微波辐射法接枝共聚制备出有机硼交联纤维素基高吸水性树脂，并对终产物的性能和结构特点进行表征与分析。结果表明:制备的有机硼交联纤维素基高吸水性树脂吸水倍率为505.2 g/g，吸盐倍率106.9 g/g，重复溶胀5次后和恒温55 ℃下静置6 h的水分含量均保持在初始饱和值的40%以上，红外光谱显示在516.77 cm-1出现的吸收峰为B—O键的弯曲振动峰，说明化合物形成了有机硼结构；该高吸水性树脂还具有良好的热稳定性和硼缓释性。 |
| 关键词: 有机硼交联剂 高吸水性树脂 性能表征 结构表征 |
| DOI：10.11841/j.issn.1007-4333.2022.03.20 |
| 投稿时间：2021-06-24 |
| 基金项目:公益性行业(农业)科研专项(201503137) |
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| Preparation and performance characterization of organic boron cross-linked cellulose-based superabsorbent resin |
|
RU Hua,WANG Yuxin,WANG Pingzhi
|
| (College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| In order to alleviate the problems of soil water loss and crop salt stress in some areas of north China, this study aimed to explore and develop a green environmental friendly super absorbent resin with water retention, salt tolerance and degradability. In this study, sodium tetraborate was used as boron source, xylitol was used as main ligand, and sodium hydroxide was used as catalyst to prepare polyhydroxy organic boron cross-linker. Taking cellulose as skeleton and acrylic acid, acrylamide acid and 2-acrylamido-2-methyl-1-propanesulfonic acid as functional monomers, the hydrophilic groups were diversified to enhance salt resistance, and self-made organic boron cross-linker was added to cross-link. The organic boron cross-linked cellulose based super absorbent resin was prepared by microwave radiation graft copolymerization, and the properties and structure of the final product were characterized and analyzed. The results showed that: The water absorption rate of the resin was 505. 2 g/g, and the salt absorption rate was 106. 9 g/g. After repeated swelling for 5 times and at constant temperature of 55 ℃ for 6 hours, the moisture content remained above 40% of the initial saturation value. The result of infrared spectrum showed that the absorption peak appeared at 516. 77 cm-1 was the flexural vibration peak of B—O bond indicating that the compounds formed organic boron structure. In addition, the super absorbent resin also showed good thermal stability and slow release property of boron. |
| Key words: organic boron cross-linker super absorbent resin performance characterization structural characterization |
