Inphonlek Supharat, Ruksakulpiwat Chaiwat, Ruksakulpiwat Yupaporn
School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
Research Center for Biocomposite Materials for Medical Industry and Agricultural and Food Industry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
Polymers (Basel). 2023 Dec 28;16(1):92. doi: 10.3390/polym16010092.
This work aims to enhance the dye-removal performance of prepared poly(acrylic acid--acrylamide)-modified, deproteinized, natural rubber ((PAA--PAM)-DPNR) through incorporation with silver nanoparticles/titanium dioxide. The (PAA--PAM)-DPNR was prepared by emulsion-graft copolymerization with a grafting efficiency of 10.20 ± 2.33 to 54.26 ± 1.55%. The composites based on (PAA--PAM)-DPNR comprising silver nanoparticles and titanium dioxide ((PAA--PAM)-DPNR/Ag-TiO) were then prepared by latex compounding using the fixed concentration of AgNO (0.5 phr) and varying concentrations of TiO at 1.0, 2.5, and 5.0 phr. The formation of silver nanoparticles was obtained by heat and applied pressure. The composites had a porous morphology as they allowed water to diffuse in their structure, allowing the high specific area to interact with dye molecules. The incorporation of silver nanoparticles/titanium dioxide improved the compressive modulus from 1.015 ± 0.062 to 2.283 ± 0.043 KPa. The (PAA--PAM)-DPNR/Ag-TiO composite with 5.0 phr of TiO had a maximum adsorption capacity of 206.42 mg/g, which increased by 2.02-fold compared to (PAA--PAM)-DPNR. The behavior of dye removal was assessed with the pseudo-second-order kinetic model and Langmuir isotherm adsorption model. These composites can maintain their removal efficiency above 90% for up to five cycles. Thus, these composites could have the potential for dye-removal applications.
这项工作旨在通过与银纳米颗粒/二氧化钛结合，提高制备的聚（丙烯酸 - 丙烯酰胺）改性、脱蛋白天然橡胶（（PAA - PAM）- DPNR）的染料去除性能。（PAA - PAM）- DPNR通过乳液接枝共聚制备，接枝效率为10.20±2.33%至54.26±1.55%。然后，使用固定浓度的AgNO₃（0.5 phr）和1.0、2.5和5.0 phr的不同浓度的TiO₂，通过胶乳共混制备基于（PAA - PAM）- DPNR的包含银纳米颗粒和二氧化钛的复合材料（（PAA - PAM）- DPNR/Ag - TiO₂）。通过加热和施加压力获得银纳米颗粒的形成。这些复合材料具有多孔形态，因为它们允许水在其结构中扩散，从而使高比表面积能够与染料分子相互作用。银纳米颗粒/二氧化钛的加入使压缩模量从1.015±0.062 KPa提高到2.283±0.043 KPa。含有5.0 phr TiO₂的（PAA - PAM）- DPNR/Ag - TiO₂复合材料的最大吸附容量为206.42 mg/g，与（PAA - PAM）- DPNR相比增加了2.02倍。用准二级动力学模型和朗缪尔等温吸附模型评估染料去除行为。这些复合材料在多达五个循环中可以将其去除效率保持在90%以上。因此，这些复合材料在染料去除应用方面具有潜力。
