Remarkable improved achievable draw ratios (DRs) and tensile strengths (σ_ts) of multiple‐stage drawn ultrahigh molecular weight polyethylene (UHMWPE)/functionalized activated carbon (FAC) fibers prepared with the aid of supercritical carbon dioxide (scCO₂) were first reported. The achievable DRs and σ_ts of single‐ and multiple‐stage drawn scCO₂UHMWPE/FAC fibers were considerably higher than those achievable DRs and σ_ts found for the corresponding single‐ and multiple‐stage drawn UHMWPE/FAC fibers spun from gel solutions gelatinized in nitrogen atmosphere. It is worth noting that the largest achievable DR obtained for the most proper five‐stage drawn scCO₂UHMWPE/FAC fiber approached 688, which is approximately 40% larger than the achievable DR found for the single‐stage drawn scCO₂F₁₀₀FAC^13.5_0.1 fiber. The σ_t found for the most proper five‐stage drawn scCO₂UHMWPE/FAC fiber reached an extraordinarily high value of 13.4 GPa, which is ∼4.6, ∼1.6 and, ∼1.4 times of those σ_ts found for the optimal single‐stage drawn UHMWPE, UHMWPE/FAC and scCO₂UHMWPE/FAC fibers, respectively. Considerably smaller lamellar thicknesses and dynamic transition temperatures were detected for scCO₂UHMWPE and scCO₂UHMWPE/FAC as‐prepared fibers compared with the equivalent UHMWPE and UHMWPE/FAC as‐prepared fibers, respectively. Specific surface area, morphological, and Fourier transform infrared analyses of the FAC particles and orientation factor analyses of the single‐ and multiple‐stage drawn UHMWPE, UHMWPE/FAC, scCO₂UHMWPE, and scCO₂UHMWPE/FAC fibers were performed. Possible reasons accounting for the remarkable improved achievable DRs and σ_ts found for the proper single‐ or multiple‐stage drawn scCO₂UHMWPE/FAC fibers are proposed.

中文翻译：

---

借助超临界CO2制备的多级拉伸超高分子量聚乙烯/活性炭纤维

显着改善的可实现的拉伸比（DRS）和拉伸强度（σ_吨或多个）多阶段的拉伸的超高分子量聚乙烯（UHMWPE）/官能化的活性炭用超临界二氧化碳的助剂（SCCO制备（FAC）纤维₂）分别为第一报告。可实现的DRS和σ_吨绘制SCCO小号单和多级的₂ UHMWPE / FAC纤维是大大高于那些实现DRS和σ_吨作者发现用于绘制的相应单和多阶段从凝胶纺丝UHMWPE / FAC纤维溶液在氮气气氛中糊化。值得注意的是，对于最合适的五阶段拉伸scCO ₂获得的最大可实现DRUHMWPE / FAC光纤接近688，比单级拉伸scCO ₂ F ₁₀₀ FAC ^13.5 _0.1光纤可达到的DR大约大40％。所述σ_吨发现绘制SCCO最适当的五阶段₂ UHMWPE / FAC纤维达到13.4 GPA，这是~4.6的一个非常高的值，~1.6和，这些的〜1.4倍σ_吨作者发现的最佳单分阶段拉伸的UHMWPE，UHMWPE / FAC和scCO ₂ UHMWPE / FAC纤维。对于scCO ₂ UHMWPE和scCO ₂，检测到的层状厚度和动态转变温度小得多将UHMWPE / FAC制成的纤维分别与等效的UHMWPE和UHMWPE / FAC制成的纤维进行比较。进行了FAC颗粒的比表面积，形态学和傅立叶变换红外分析，以及单级和多级拉伸UHMWPE，UHMWPE / FAC，scCO ₂ UHMWPE和scCO ₂ UHMWPE / FAC纤维的取向因子分析。可能的原因占了显着改进的可实现的DRS和σ_吨作者发现用于绘制SCCO合适的单个或多个阶段₂提出了UHMWPE / FAC纤维。