Abstract

Carboxymethyl cellulose (CMC) is a most versatile cellulose derivative having several industrial applications such as mineral processing, pelletisation process, oil drilling, surface modifications, functionalization of materials, and other promising utilizations. However, due to less explore insight the binding aspect of the CMC onto the polymeric surface in its aqueous medium hinders its applications. Therefore, this research work has been made to explore the binding aspects of CMC onto the polymeric surface (modified polypropylene powder (MPP)) derived from polypropylene (PP). The porosity nature of the MPP and specific surface area (S_BET) =22.842 m² g⁻¹ was confirmed by the BET analysis. The pH and ionic strength suggest that electrostatic interaction is responsible for adsorption and confirmed by depth cauterization techniques. Furthermore, to clear the binding aspect urea test was carried out during the adsorption which added assurance that adsorption in the present case is also attributed to the presence of hydrogen bonding. The adsorption free energy of CMC was found as –22.561 kJ/mol which is a close agreement with H-bonding. All of the above results coupled with reported facts strongly support that the adsorption of CMC onto MPP surface is associated with electrostatic interaction and hydrogen bonding. Thus, an apparent overview of the binding aspect of CMC onto polymeric surfaces can endorse CMC as a potential adsorbate for various industrial applications.

摘要

羧甲基纤维素 (CMC) 是一种用途最广泛的纤维素衍生物，具有多种工业应用，例如矿物加工、造粒工艺、石油钻探、表面改性、材料功能化和其他有前景的用途。然而，由于较少探索洞察，CMC 在其水性介质中的聚合物表面的结合方面阻碍了其应用。因此，这项研究工作是为了探索 CMC 与聚丙烯 (PP) 衍生的聚合物表面 (改性聚丙烯粉末 (MPP)) 的结合方面。MPP 的孔隙率和比表面积 ( S _BET ) =22.842 m ² g ^-1BET 分析证实了这一点。pH 值和离子强度表明静电相互作用是吸附的原因，并通过深度烧灼技术得到证实。此外，为了清除结合方面的尿素测试，在吸附过程中进行了测试，这增加了在当前情况下吸附也归因于氢键的存在的保证。CMC 的吸附自由能为 –22.561 kJ/mol，与氢键非常吻合。所有上述结果加上报道的事实强烈支持 CMC 在 MPP 表面的吸附与静电相互作用和氢键有关。因此，对 CMC 与聚合物表面的结合方面的明显概述可以认可 CMC 作为各种工业应用的潜在吸附物。