增强抗冲击和热性能的功能防护复合材料  

Advanced functional safeguarding composites with enhanced anti-impact and excellent thermal properties

作　　者：王文慧 王胜[1] 刘帅[1] 周建宇 张峻硕 袁芳 桑敏 龚兴龙[1] Wenhui Wang;Sheng Wang;Shuai Liu;Jianyu Zhou;Junshuo Zhang;Fang Yuan;Min Sang;Xinglong Gong(CAS Key Laboratory of Mechanical Behavior and Design of Materials,Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]中国科学技术大学中科院材料力学行为和设计重点实验室,近代力学系,安徽合肥230027

出　　处：《中国科学技术大学学报》2023年第4期43-52,I0009,共11页JUSTC

基　　金：supported by the National Natural Science Foundation of China (12132016, 11972032, 12172349);USTC Research Funds of the Double First-Class Initiative (YD2480002004);the Fundamental Research Funds for the Central Universities (WK2480000007);USTC Center for Micro- and Nanoscale Research and Fabrication。

摘　　要：个人安全防护在日常生活中一直扮演着重要的角色。开发具有增强抗冲击和优异热性能的先进功能安全防护复合材料将是防护服的重大发展。因此,通过将短凯夫拉纤维(KFs)引入到剪切变硬弹性体(SSE)中制备了凯夫拉纤维增强聚合物(KFRP)。具有15 wt%KFs的KFRP(KFRP-15%)的储能模量随剪切频率由0.1 Hz到100 Hz从222.8 kPa增加到830.8 kPa。垂直型KFRP-15%相比SSE具有更高的抗拉强度(2.65 MPa)和断裂韧性(11.95 kJ/m2),表现出更强的抗撕裂性。另外,KFRP-15%具有优异的抗冲击性能,它可以将锤头冲击力从1.74 kN耗散到0.56 kN,且在10次连续冲击后仍然保持完好。进一步,KFRP-15%也具有优异的抗刺性能。此外,KFRP-15%还表现出改善的传热性能、阻燃和抑烟能力。最后,集防护、散热和阻燃一体的基于KFRP-15%的护腕被成功制备。Personal safety protection has played an important role in daily life. Developing advanced functional safeguarding composites with enhanced anti-impact and excellent thermal properties will be a significant development for body armor. Herein, Kevlar fiber reinforced polymers(KFRP) were fabricated by introducing short Kevlar fibers(KFs) into a shear stiffening elastomer(SSE). The storage modulus of KFRP with 15 wt% KFs(KFRP-15%) increased from 222.8 kPa to 830.8 kPa when the shear frequency varied from 0.1 Hz to 100 Hz. KFRP-15% achieved a higher tensile strength(2.65MPa) and fracture toughness(11.95 kJ/m~2) than SSE in the vertical type, showing superior tear resistance. Additionally,KFRP-15% exhibited promising anti-impact properties, which could dissipate the drop hammer impact force from 1.74 kN to 0.56 kN and remained intact after 10 consecutive impacts. Moreover, KFRP-15% also presented excellent stab-resistant performance. In addition, KFRP-15% also showed improved heat transfer properties, flame retardancy, and smoke suppression capabilities. Finally, functional bracers based on KFRP-15% for protection, thermal-dissipation, and flameretardant were successfully prepared.

关 键 词：凯夫拉 剪切变硬弹性体 纤维增强聚合物 安全防护 热性能 

分 类 号：TB332[一般工业技术—材料科学与工程]