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        納米二氧化鈦對PP/PE復合纖維性能的影響
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        1.織金縣農業農村局;2.太原理工大學材料科學與工程學院

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        Effect of nano titanium dioxide on properties of PP/PE composite fibers
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          摘要:

          采用聚乙烯(PE)、聚丙烯(PP)和二氧化鈦納米顆粒(TiO2)熔融混紡,制備了PP/PE/TiO2復合纖維,研究了TiO2含量對復合纖維結構、動態力學性能和力學性能及光催化降解性能的影響。結果表明,TiO2作為微聚集體均勻地分散在復合纖維基質中,隨TiO2含量增加,聚集體尺寸越大。TiO2的加入對復合纖維的熔融溫度(Tm)無顯著影響,少量TiO2具有成核促進作用,提高結晶速率,使結晶度增大。隨著TiO2含量增加,復合纖維的斷裂強度和結節強度先增加后降低,少量TiO2對復合纖維具有增強增韌的作用。光降解200h后,復合纖維的斷裂強度,結節強度損失率與TiO2含量的變化趨于線性關系,隨TiO2含量增加,復合纖維力學性能顯著降低,斷裂強度、結節強度損失率顯著增加,光降解性能增強。

          Abstract:

          PP/PE/TiO2 composite fibers were prepared by melt blending of polyethylene (PE), polypropylene (PP) and titanium dioxide nanoparticles (TiO2).The effects of TiO2 content on the structure, dynamic and mechanical properties of the composite fibers and photocatalytic degradation properties were investigated.The results show that TiO2 is uniformly dispersed in the composite fiber matrix as micro-aggregates, and the aggregate size increases with the increase of TiO2 content. The addition of TiO2 has no significant effect on the melting temperature (Tm) of the composite fibers, and a small amount of TiO2 has the effect of promoting nucleation, increasing the crystallization rate and increasing the crystallinity. With the increase of TiO2 content, the breaking strength and Knoting strength of the composite fibers first increased and then decreased, and a small amount of TiO2 had the effect of strengthening and toughening the composite fibers.After photodegradation for 200h, the breaking strength of the composite fibers, the nodule strength loss rate and the TiO2 content tended to be linear. With the increase of TiO2 content, the mechanical properties of the composite fibers decreased significantly, the breaking strength and Knoting strength loss rate increased significantly, and the photodegradation performance was enhanced.

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        • 收稿日期:2023-04-07
        • 最后修改日期:2023-08-17
        • 錄用日期:2023-11-17
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