For filler-polymer systems, the ultimate importance of interfacial interactions between fillers and polymers lies in improving morphological developments and properties of composites. In this work, sepiolite fiber (SEP)/polyoxymethylene (POM) is formulated through melt extrusion processing, with the aim of promoting the crystallization and overall performance of POM. Results show that hydrogen bonding prevails between SEP hydroxyls and POM C-O-C groups. Thus SEP fibers are dispersed uniformly in the POM matrix due to interfacial interactions between these two components. During the isothermal crystallization process, POM nuclei originate and grow on the SEP surface, resulting in decreasing spherulite sizes and facilitating the POM crystallization. Meanwhile, the crystallinity of POM is increased from 48.3% to 54.1% by the addition of 5 wt% SEP. Noteworthily, mechanical and thermostability performances of SEP/POM composites have been improved considerably by means of sufficient interfacial interactions, enhanced crystallization, and favorable physical properties of SEP. Maximum values of the tensile strength and modulus at 3.0 wt% SEP loading can reach 66 MPa and 2022 MPa, respectively higher than those of neat POM.

对于填料-聚合物体系，填料和聚合物之间的界面相互作用的最终重要性在于改善复合材料的形态发展和性能。在这项工作中，海泡石纤维（SEP）/聚甲醛（POM）通过熔融挤出工艺配制，旨在促进POM的结晶和整体性能。结果表明，氢键主要存在于SEP羟基和POM COC基团之间。因此，由于这两个组分之间的界面相互作用，SEP纤维均匀分散在POM基质中。在等温结晶过程中，POM核起源并在SEP表面上生长，从而导致球晶尺寸减小并促进POM结晶。同时，通过添加5重量％的SEP，POM的结晶度从48.3％增加到54.1％。值得注意的是，借助于充分的界面相互作用，增强的结晶作用和SEP的良好物理性能，SEP / POM复合材料的机械和热稳定性能得到了显着改善。在SEP含量为3.0 wt％时，抗张强度和模量的最大值分别达到66 MPa和2022 MPa，分别高于纯POM。