基于电纺预处理溶解浆的纤维素复合膜制备与应用

Preparation and Application of Cellulose Composite Membrane based on Electrospinning-pretreated Dissolving Pulp

中文关键词:  纤维素  MOF  静电纺丝  油水分离  抗菌材料

Key Words:cellulose  MOF  electrospinning  oil-water separation  antibacterial material

中文摘要:

      以溶解浆为原料，三氟乙酸（TFA）和二氯乙烷（DCE）为溶解体系，通过预添加聚环氧乙烯（PEO）增稠剂和Cu（Ac）₂前驱体制得纺丝液，并利用静电纺丝预处理技术，成功制得负载有机金属框架物（MOF，即HKUST-1）的电纺纤维素复合膜（HKUST-1@CF），探讨了溶解浆种类、TFA/DCE体积比、PEO和Cu（Ac）₂添加量等对HKUST-1@CF结构与性能的影响。结果表明，当选用阔叶木溶解浆为原料、TFA/DCE体积比为6∶4、纤维素/PEO/Cu（Ac）₂质量比为10∶2∶3时，纤维素纺丝性能最佳；预添加PEO与Cu（Ac）₂有助于MOF负载（最高负载量达16.1%），且HKUST-1@CF膜表现出优异的油水分离性（分离效率98%）及良好的抑菌性能（抑菌圈3.1 mm），其在膜分离及环境治理方面具有潜在应用价值。

Abstract:

      A novel cellulose composite membrane， HKUST-1@CF loaded with metal-organic frame （MOF， i.e.， HKUST-1）， was prepared by electrospinning pretreatment using dissolving pulp as raw material and trifluoroacetic acid （TFA）/dichloroethane （DCE） as dissolving system. Polyethylene oxide （PEO） and copper acetate （Cu（Ac）₂） were pre-added into the dissolving system as thickener and precursor， respectively， to fabricate spinning dope system. The effects of dissolving pulp type， TFA/DCE volume ratio， and PEO and Cu（Ac）₂ dosages on the structure and properties of HKUST-1@CF were comprehensively investigated. The results showed that when hardwood dissolving pulp was used as raw material， the volume ratio of TFA/DCE was 6∶4 and the mass ratio of cellulose/PEO/Cu（Ac）₂ was 10∶2∶3， cellulose had the best spinning performance. The pre-addition of PEO and Cu（Ac）₂ contributed to the HKUST-1 load， up to 16.1%. The as-prepared composite membrane showed excellent oil-water separation with separation efficiency of 98% and good bacterial inhibition performance with inhibition circle of 3.1 mm， showing potential application value in membrane separation and environmental governance.