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林产化学与工业 ›› 2019, Vol. 39 ›› Issue (5): 101-107.doi: 10.3969/j.issn.0253-2417.2019.05.014

• 研究报告 • 上一篇    下一篇

浒苔纤维聚丙烯酸吸水树脂的制备及性能分析

张浩楠, 韦家慧, 赵辉, 李丹, 任浩   

  1. 南京林业大学 轻工与食品学院, 江苏 南京 210037
  • 收稿日期:2019-05-09 出版日期:2019-10-25 发布日期:2019-11-01
  • 通讯作者: 任浩,教授,研究领域为植物资源化学及生物质转化;E-mail:renhao@njfu.edu.cn E-mail:renhao@njfu.edu.cn
  • 作者简介:张浩楠(1996-),男,河北邯郸人,本科生,研究方向为生物质转化及利用
  • 基金资助:
    大学生实践创新训练计划项目(201710298039Z,2018NFUSPITP670);南京林业大学杰出青年基金(NLJQ2015-005)

Preparation and Application of Enteromorpha prolifera Fibers of Polyacrylic Acid-based Absorbent Resins

ZHANG Haonan, WEI Jiahui, ZHAO Hui, LI Dan, REN Hao   

  1. College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2019-05-09 Online:2019-10-25 Published:2019-11-01

摘要: 在浒苔纤维上接枝丙烯酸,通过改变浒苔纤维的预处理方法,探讨浒苔纤维在聚丙烯酸类吸水树脂中应用的可行性。以未预处理、1% NaOH预处理和漂白预处理浒苔纤维为原料,在固定的碱用量、交联剂和引发剂用量条件下制备浒苔纤维聚丙烯酸吸水树脂,考察了预处理方法、丙烯酸中和度、浒苔纤维用量和尺寸对吸水树脂性能的影响;比较了吸水树脂对去离子水、生理盐水、人工尿液3种液体的吸液倍率。研究结果表明:合成吸水树脂过程中浒苔纤维用量为1.00 g、丙烯酸中和度为65%、筛分尺寸为250~380 μm的未预处理浒苔纤维合成的吸水树脂吸液性能最好,其对去离子水、生理盐水和人工尿液的吸液倍率分别为1 643、244和201 g/g。通过扫描电子显微镜(SEM)观察发现,未预处理浒苔纤维与丙烯酸接枝效果最好,合成的树脂吸水饱和后纤维形态饱满、孔隙少。X射线衍射(XRD)结果也显示,浒苔纤维经过预处理后其非结晶区大量流失,结晶度升高,纤维素结晶区不利于与丙烯酸单体的接枝,从而阻碍了碱预处理和漂白预处理浒苔纤维与丙烯酸的接枝反应。

关键词: 浒苔纤维, 预处理, 丙烯酸, 吸水树脂

Abstract: The graft of Acrylic acid onto Enteromorpha prolifera fiber as well as its feasibility was reported and evaluated by varying the fiber pretreatment methods. Water-absorbent resins was synthesized under the conditions of the fixed amount of alkali, crosslinking agent and initiator dosage that using non-pretreated E. prolifera fiber, 1% NaOH pretreated fiber, and bleaching-pretreated fiber as raw materials. The influence of different pretreatment degrees, addition quantities, and fiber size on the water absorbance properties of the resins was studied while keeping the same amount of alkali charge, neutralization degree, crosslinking and initiator agent. The results showed that the synthesized absorbent resin has the best liquid absorption performance. The absorbance rates of deionized water, normal saline, and artificial urine reached 1 643, 244, and 201 g/g, respectively under the conditions of alginate of 1 g, the neutralization degree of acrylic acid of 65%, and the sieving size of 250-380 μm. The SEM images of non-pretreated alginate fiber water-absorbent resin indicated that the fibers had a plump morphology, and the porosity decreased after the water-absorbent resin was saturated. X-ray diffraction (XRD) showed that the amorphous region of the fiber dramatically disappeared. Otherwise the residual crystalline zone hindered the alkali pretreatment and bleaching pretreatment and resulted in the unfavorite of the grafting reaction of Enteromorpha prolifera fibers with acrylic acid.

Key words: alginate fiber, pretreatment, acrylic acid, absorbent resin

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