摘要
为优化高吸水性树脂的合成工艺、降低成本、提高耐盐性,以丙烯酸(AA和2–丙烯酰胺基–2–甲基丙磺酸(AMPS为单体,接枝淀粉,添加经有机改性的钠基蒙脱土,以过硫酸铵为引发剂,NN亚甲基双丙烯酰胺为交联剂,采用水溶液聚合法制备了低成本的AA/AMPS–淀粉–有机改性蒙脱土(OMMT复合耐盐性高吸水树脂。通过单因素实验法优化了工艺合成条件。利用红外光谱(FT–IR、X射线衍射(XRD和扫描电镜(SEM对产物的组成和微观形貌结构进行了表征。实验表明,经有机改性的蒙脱土的片层间距增大,而AMPS的添加可提高聚合物的耐盐性。制备的有机无机复合高吸水材料在蒸馏水中的吸水率达到974 g/g在质量分数为0.9%的NaCl溶液中的吸盐水率达到316 g/g。
In order to optimize the synthesis process of high water-absorbing resin, reduce the cost and increase the salt resistance, the acrylic acid （AA）/2-acrylamido-2-methyl propanesulfonic acid （AMPS）-starch-organic modified montmorillonite （OMMT） composite salt resistant high water-absorbing resin with low cost was prepared by aqueous solution polymerization method using AA and AMPS as monomers, grafting starch, and then adding organic modified sodium-based montmorillonite, and using ammonium persulfate as initiator, N,N-methylene bis-acrylamide as crosslinking agent. The synthetic process conditions were optimized by using single factor experiment method. The composition and micro-morphology structure of the product were characterized by using infrared spectrum （FT-IR）, X ray diffraction （XRD） and scanning electronic microscopy （SEM） methods. The experiments show that the distance between layers of montmorillonite increases by organic modification, and the salt resistance of polymers increases by adding AMPS. The absorbency of prepared organic and inorganic composite high water-absorbing materials in distilled water reaches 974 g/g, and the saline-absorbency of it in NaC1 aqueous solution with mass fraction of 0.9% reaches 316 g/g.
出处
《化学推进剂与高分子材料》
CAS
2014年第6期73-78,共6页
Chemical Propellants & Polymeric Materials
基金
山东省自然科学基金(No.ZR2012EMM012
No.ZR2012EMQ002)
关键词
高吸水树脂
有机改性蒙脱土
淀粉
丙烯酸
2–丙烯酰胺基–2–甲基丙磺酸
耐盐性
high water-absorbing resin
organic modified montmorillonite
starch
acrylic acid
2-acrylamido-2-methyl propanesulfonic acid
salt resistance
