Kian Lau Kia, Jawaid Mohammad, Alamery Salman, Vaseashta Ashok
Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia.
Department of Biochemistry, College of Science, King Saud University, PO Box 22452, Riyadh 11451, Saudi Arabia.
Nanomaterials (Basel). 2021 Jan 20;11(2):255. doi: 10.3390/nano11020255.
The development of membrane technology from biopolymer for water filtration has received a great deal of attention from researchers and scientists, owing to the growing awareness of environmental protection. The present investigation is aimed at producing poly(D-lactic acid) (PDLA) membranes, incorporated with nanocrystalline cellulose (NCC) and cellulose nanowhisker (CNW) at different loadings of 1 wt.% (PDNC-I, PDNW-I) and 2 wt.% (PDNC-II PDNW-II). From morphological characterization, it was evident that the nanocellulose particles induced pore formation within structure of the membrane. Furthermore, the greater surface reactivity of CNW particles facilitates in enhancing the surface wettability of membranes due to increased hydrophilicity. In addition, both thermal and mechanical properties for all nanocellulose filled membranes under investigation demonstrated significant improvement, particularly for PDNW-I-based membranes, which showed improvement in both aspects. The membrane of PDNW-I presented water permeability of 41.92 L/mh, when applied under a pressure range of 0.1-0.5 MPa. The investigation clearly demonstrates that CNWs-filled PDLA membranes fabricated for this investigation have a very high potential to be utilized for water filtration purpose in the future.
由于对环境保护的意识不断增强，利用生物聚合物开发用于水过滤的膜技术受到了研究人员和科学家的广泛关注。本研究旨在制备聚（D-乳酸）（PDLA）膜，该膜在不同负载量（1 wt.%（PDNC-I、PDNW-I）和2 wt.%（PDNC-II、PDNW-II））下掺入了纳米晶纤维素（NCC）和纤维素纳米晶须（CNW）。从形态表征来看，很明显纳米纤维素颗粒在膜结构内诱导形成了孔隙。此外，由于亲水性增加，CNW颗粒更高的表面反应性有助于提高膜的表面润湿性。此外，所有研究的纳米纤维素填充膜的热性能和机械性能都有显著改善，特别是基于PDNW-I的膜，在两个方面都有改善。当在0.1-0.5 MPa的压力范围内应用时，PDNW-I膜的水渗透率为41.92 L/mh。该研究清楚地表明，本研究制备的CNW填充的PDLA膜在未来用于水过滤目的方面具有很高的潜力。
