2024年11月15日 · The PVA fiber had a significant positive impact on the structural build-up ability and shape stability of the 3D printable red mud-based geopolymer. In addition, PVA fibers promoted the bending strength of the hardened geopolymer specimens better than the compression strength, and the geopolymer gel on the fibers indicated the good interfacial ...

2019年5月23日 · PVA-red mud organic–inorganic composite films were successfully prepared by using the sol–gel process and with 2–50 wt% of red mud loading. Effects of sodium lauryl sulfate (SLS) were established for the composite films. UV–Vis study established that transparencies of the composites were decreased with the increase of red mud loading in ...

2022年12月1日 · Polyvinyl alcohol (PVA)-based composite films have been developed as a biodegradable packaging material. Chitosan, CMC, and gelatin are the most biopolymers mixed with PVA film. Essential oils, nanomaterials, and active materials have been used to improve the properties of PVA films.

2017年5月1日 · At a high concentration of Congo red, the intermolecular hydrogen bonding resulted in a characteristic new feature of the host polymer PVA. PVA/CR has unique optical properties at the higher concentrations allowing their application on …

2022年9月29日 · High-quality polymeric composite films containing Congo red dye and PVA were prepared using the casting technique. The proposed Cr-doped PVA composites were examined using XRD, UV–visible optical, dielectric, and optical limiting effect techniques.

2007年1月5日 · A series of polymer–acid-modified red mud composite (PRM) materials that consist of poly (vinyl alcohol) (PVA) and layered Red mud (RM) are prepared by effectively dispersing organic PVA...

This study demonstrates the feasibility of 3D printed red mud-based geopolymer and the reinforcement of 3D printed red mud-based geopolymer by PVA fibers, providing a material perspective to increase the range of red mud applications in 3D printed concrete.

2011年11月3日 · Mechanism and condensation reaction showing organic modification of red mud. Polyvinyl alcohol (PVA) is commercially available in dry granular or powdered form. It is a water-soluble and fully biodegradable polymer [3, 4]. PVA is having planar zigzag structure like polyethylene [5]. All PVA grades are readily soluble in water.

ABSTRACT: A series of polymer–acid-modified red mud composite (PRM) materials that consist of poly(vinyl alco-hol) (PVA) and layered Red mud (RM) are prepared by effectively dispersing...

2020年5月10日 · PVA is water soluble, which has been modified with MF (13%, 23%, 33% and 43%) to increase hydrophobicity confirmed by contact angle (50 ° to 91 °). The dye adsorption of Congo red (CR) has been influenced by different parameters such as contact time, pH of the solution and an effect of dye concentration were systematically investigated.