氧化硼对聚磷酸钙纤维力学和降解性能的影响

doi:10.15541/jim20180188

摘要/Abstract

摘要：

采用熔融拉丝法制备聚磷酸钙纤维(Calcium Polyphosphate Fibers, CPPF)。探究不同质量分数的B₂O₃对CPPF的降解性能和力学性能的影响。利用傅立叶红外光谱仪、扫描电子显微镜(SEM)等对材料的结构及其性能进行表征。研究表明：随着B₂O₃质量分数的增加, CPPF的拉伸强度和模量有了明显的提高, 但纤维表面变得粗糙; 同时CPPF的阻降性能随着B₂O₃含量的升高而提高, 且降解后的纤维表面的裂纹减少。B₂O₃具有较优的阻降效果, 当B₂O₃的添加量为9%时, 其拉伸强度和模量比未添加的CPPF提高了146%和153%; 在降解16 d后, 其质量损失率相对于未添加的CPPF减少了31%。

关键词: 聚磷酸钙纤维, B₂O₃, 力学性能, 降解性能

Abstract:

Calcium polyphosphate fibers (CPPF) were prepared by melt-drawing method. Effect of B₂O₃ with different mass fraction on degradation and mechanical properties of CPPF was studied. The obtained CPPF were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Results showed that tensile strength and modulus of CPPF were improved obviously with increase of mass fraction of B₂O₃. Moreover, the surface morphology of CPPF was influenced by the introducing of B₂O₃. In addition, the degradation ratio and cracks on the surface of CPPF decreased with increase of B₂O₃ content. Tensile strength and modulus of CPPF with B₂O₃ loading of 9% increased sharply by 146% and 153% compared to neat CPPF, respectively. After 16 d, the mass loss ratio of CPPF with B₂O₃ loading of 9% in the degradation process is reduced by 31% compared to the neat CPPF.

Key words: calcium polyphosphate fiber, B₂O₃, mechanical property, degradation property

中图分类号:

TQ174

强小虎,李彬彬,黄大建,周松毅. 氧化硼对聚磷酸钙纤维力学和降解性能的影响[J]. 无机材料学报, 2019, 34(2): 201-206.

QIANG Xiao-Hu, LI Bin-Bin, HUANG Da-Jian, ZHOU Song-Yi. Boron Oxide on Mechanical and Degradation Property of Calcium Polyphosphate Fibers[J]. Journal of Inorganic Materials, 2019, 34(2): 201-206.

图/表 8

图1 不同B2O3添加量的CPPF的SEM照片

Fig. 1 SEM images of CPPF with different content of B2O3(a) CPPF-0; (b) CPPF-1; (c) CPPF-5; (d) CPPF-9

图2 不同B2O3添加量的CPPF的FT-IR图谱

Fig. 2 FT-IR spectra of CPPF with different content of B2O3

图3 B2O3添加量对CPPF力学性能的影响

Fig. 3 Effect of B2O3 loadings on the mechanical properties of CPPF

图4 聚磷酸钙纤维不同时间的降解照片

Fig. 4 Degradation photographs of calcium polyphosphate fiber at different time

图5 降解后样品(A)和沉淀物的XRD(B)图谱

Fig. 5 XRD spectra of samples (A) and precipitation (B) after degradation

图6 不同添加量的CPPF降解后表面的SEM照片

Fig. 6 Surface SEM images of CPPF with different loadings after degradation

图7 不同含量的纤维的pH值随降解时间的变化曲线

Fig. 7 pH value in PBS for samples with different loading proportions after degradation for different periods

图8 不同B2O3含量的CPPF的降解残留率随降解时间的变化曲线

Fig. 8 Weight residual ratio of calcium polyphosphate fiber with various B2O3 loadings

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