Affiliation:
1. Wood and Paper Science Department, Faculity of Natural Resources, Sari Agricultural Sciences and Natural Resource University, Sari 4818168984, Mazandaran, Iran
2. Chemical and Environmental Engineering Department, University of the Basque Country UPV/EHU, Plaza Europa, 1, 20018 Donostia-San Sebastián, Spain
Abstract
As air pollution escalates, the need for air filters increases. It is better that the filters used be based on natural fibers, such as non-wood fibers, which cause low damage to the environment. However, the short fiber lengths, low apparent densities, and high volumes of non-wood materials can make it challenging to prepare filter paper with the required mechanical and physical properties. In that context, this study focused on utilizing bamboo fibers to fabricate filter paper by employing the anthraquinone soda pulping method. The pulp underwent bleaching and oxidation processes, with the incorporation of cationic starch (CS) and polyvinyl alcohol (PVA) to enhance resistance properties, resulting in the creation of handmade filter papers. The findings revealed that the tear, burst, and tensile strength of filter paper increased with the oxidation and addition of CS and PVA. Air permeability increased with addition of PVA and combination of CS and PVA. FTIR demonstrated the conversion of hydroxyl groups in cellulose chains to carboxyl groups due to oxidation. SEM images illustrated alterations in the fiber structure post-oxidation treatment, with CS reducing pores while PVA and the CS-PVA combination enlarged pore size and enhanced porosity. The BET surface area surface area expanded with oxidation and the addition of the CS-PVA blend, indicating heightened filter paper porosity. Notably, the combined inclusion of CS and PVA not only augmented mechanical strength but also increased porosity while maintaining pore size.
Reference49 articles.
1. Jung, S., and Kim, J. (2020). Advanced design of fiber-based particulate filters: Materials, morphology, and construction of fibrous assembly. Polymers, 12.
2. Synthesis and characterization of air filter media made from cellulosic ramie fiber (Boehmeria nivea);Suriaman;Carbohydr. Polym. Technol. Appl.,2022
3. High performance air filters produced from freeze-dried fibrillated wood pulp: Fiber network compression due to the freezing process;Macfarlane;Ind. Eng. Chem. Res.,2012
4. Pulp and papermaking properties of bamboo species Melocanna baccifera;Tripathi;Cellul. Chem. Technol.,2018
5. Non-wood fibers as raw material for pulp and paper industry;Nord. Pulp Pap. Res. J.,2020