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| Preparation of Filter Paper Used for Masks (PM2.5) from Modified Sisal Pulp |
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| DOI：10.11980/j.issn.0254-508X.2017.02.007 |
| Key Words:sisal fibers modification PM2.5 masks filter paper |
| Fund Project:黑龙江省大学生创新训练项目 (201510225106)；东北林业大学大学生创新实验项目(201510225106）；黑龙江省留学归国人员科学基金（LC2013C11）。 |
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| Abstract:In this research, the sisal pulp was chosen as the raw material and was treated in NaOH-Urea-Thiourea aqueous solution cooperating with ultrasonic treatment to prepare high-accuracy filtration materials (PM2.5). The performance requirements of the filter paper were met thought the NaOH-Urea-Thiourea treatment, a novel method for preparing sisal fibers with highly swollen, loosening, fibrillation and protecting fiber from over cutting in this research. Based on preliminary exploration experiments, the agent concentration, treatment time, treatment temperature and the treatment time of ultrasonic were chosen as key factors of the treatment. Moreover, orthogonal experiment was designed to investigate the effects of these factors on the treatment result. Simultaneously, comparing the morphology of fiber and the main parameters of the filter paper (permeability, bulk, pore size, and zero-span tensile strength) with that of the untreated filter and the filter paper prepared with untreated filters and refer to the performance of masks (PM2.5) of 3M Company to evaluate the effect of modification. These results demonstrated that the filter paper exceeded the expectant performance requirement of masks (PM2.5) filter material by using the sisal fibers treated with 24% NaOH-Urea-Thiourea aqueous solution at -6℃ for 20 min and ultrasonic process for 60 min. The permeability of the filter paper was 313.12 L/(m2·s), average pore size was 32.43 μm, maximum pore size was 36.95 μm, bulk was 5.26 cm3/g. |
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