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Organosilane compounds for tunable recycling of waste superabsorbent polymer fine particles
Polymer Bulletin ( IF 3.1 ) Pub Date : 2022-01-04 , DOI: 10.1007/s00289-021-03877-6
Nasrin Moini 1 , Kourosh Kabiri 1
Affiliation  

Dust and fine superabsorbent polymer particles (< 150 µm) cause problems during absorbency through the gel blockage phenomenon. Hence, they are removed and considered as waste materials which can harshly raise economic and environmental issues for industries. The recycling of this class of material is of great importance. Herein, the fine acrylate-based SAP particles have been recycled using silicone-based coupling agents as reactant via IPN and crosslinking strategies to agglomerate the fine particles. The process has been conducted in three major steps: treatment solution preparation, agglomeration and moulding the SAP fines through the impregnation approach, and then pulverizing the moulded SAP. ATR-FTIR, SEM, oscillatory rheometer and compression strength analysis were employed for this study. The effect of acetone-to-water ratio, reactant type and extent on free swelling capacities in deionized water and saline solution, absorbency under load (AUL), recycling performance, elastic and loss moduli, and compression strength have been investigated. The fine SAP can be recycled up to 80% without any deteriorated properties, either swelling or mechanical; even recycling can raise the swollen gel strength under stress. The analytical investigation of recycled SAP particles reveals a well-attached porous structure that incredibly maintains its integrity in wet and dry states. The weld lines have been perfectly covered by siloxane-based IPN formation. The ability to design and tune the shape of the absorbent article with definite strength based on application makes this recycling process promising.

Graphical abstract



中文翻译:

有机硅烷化合物用于可调节回收废弃高吸水性聚合物细颗粒

灰尘和细小的超吸收聚合物颗粒 (< 150 µm) 通过凝胶堵塞现象在吸收过程中引起问题。因此,它们被移除并被视为废料,这会给工业带来严重的经济和环境问题。此类材料的回收利用非常重要。在本文中,已使用基于硅酮的偶联剂作为反应物通过 IPN 和交联策略对细的丙烯酸酯基 SAP 颗粒进行回收,以凝聚细颗粒。该过程分三个主要步骤进行:处理溶液制备、附聚和通过浸渍方法将 SAP 细粒成型,然后粉碎成型的 SAP。本研究采用 ATR-FTIR、SEM、振荡流变仪和抗压强度分析。丙酮与水的比例的影响,已经研究了负载吸收率 (AUL)、回收性能、弹性和损耗模量以及压缩强度。精细的 SAP 可回收高达 80%,而不会出现任何性能劣化,无论是溶胀还是机械性能;即使再循环也可以提高应力下的溶胀凝胶强度。对回收的 SAP 颗粒的分析研究揭示了一种附着良好的多孔结构,在潮湿和干燥状态下都能保持其完整性。熔接线已被基于硅氧烷的 IPN 形成完美覆盖。基于应用设计和调整具有确定强度的吸收制品的形状的能力使得这种回收过程具有前景。已经研究了负载吸收率 (AUL)、回收性能、弹性和损耗模量以及压缩强度。精细的 SAP 可回收高达 80%,而不会出现任何性能劣化,无论是溶胀还是机械性能;即使再循环也可以提高应力下的溶胀凝胶强度。对回收的 SAP 颗粒的分析研究揭示了一种附着良好的多孔结构,在潮湿和干燥状态下都能保持其完整性。熔接线已被基于硅氧烷的 IPN 形成完美覆盖。基于应用设计和调整具有确定强度的吸收制品的形状的能力使得这种回收过程具有前景。精细的 SAP 可回收高达 80%,而不会出现任何性能劣化,无论是溶胀还是机械性能;即使再循环也可以提高应力下的溶胀凝胶强度。对回收的 SAP 颗粒的分析研究揭示了一种附着良好的多孔结构,在潮湿和干燥状态下都能保持其完整性。熔接线已被基于硅氧烷的 IPN 形成完美覆盖。基于应用设计和调整具有确定强度的吸收制品的形状的能力使得这种回收过程具有前景。精细的 SAP 可回收高达 80%,而不会出现任何性能劣化,无论是溶胀还是机械性能;即使再循环也可以提高应力下的溶胀凝胶强度。对回收的 SAP 颗粒的分析研究揭示了一种附着良好的多孔结构,在潮湿和干燥状态下都能保持其完整性。熔接线已被基于硅氧烷的 IPN 形成完美覆盖。基于应用设计和调整具有确定强度的吸收制品的形状的能力使得这种回收过程具有前景。熔接线已被基于硅氧烷的 IPN 形成完美覆盖。基于应用设计和调整具有确定强度的吸收制品的形状的能力使得这种回收过程具有前景。熔接线已被基于硅氧烷的 IPN 形成完美覆盖。基于应用设计和调整具有确定强度的吸收制品的形状的能力使得这种回收过程具有前景。

图形概要

更新日期:2022-01-05
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