In order to obtain high-performance electromagnetic wave absorbers,the adjustment of structure and components is essential.Based on the above requirements,this system forms a three-dimensional frame structure consisti...In order to obtain high-performance electromagnetic wave absorbers,the adjustment of structure and components is essential.Based on the above requirements,this system forms a three-dimensional frame structure consisting of MXene and transition metal oxides(TMOs)through efficient electrostatic self-assembly.This three-dimensional network structure has rich heterojunction structures,which can cause a large amount of interface polarization and conduction losses in incident electromagnetic waves.Hollow structures cause multiple reflections and scattering of electromagnetic waves,which is also an important reason for further increasing electromagnetic wave losses.When the doping ratio is 1:1,the system has the best impedance matching,the maximum effective absorption bandwidth(EAB max)can reach 5.12 GHz at 1.7 mm,and the minimum reflection loss(RL_(min))is-50.30 dB at 1.8 mm.This provides a reference for the subsequent formation of 2D-MXene materials into 3D materials.展开更多
基于仿生学,设计并开发具有不对称润湿梯度的新型三维导湿结构面料。将纬编间隔、双罗纹作为对比组织结构,设置9.5,10.0,10.5 mm 3种线圈长度,及细度比为28∶33、28∶50、28∶67的3种亲疏水纱线,设计编织9种面料;对其芯吸高度、透湿性...基于仿生学,设计并开发具有不对称润湿梯度的新型三维导湿结构面料。将纬编间隔、双罗纹作为对比组织结构,设置9.5,10.0,10.5 mm 3种线圈长度,及细度比为28∶33、28∶50、28∶67的3种亲疏水纱线,设计编织9种面料;对其芯吸高度、透湿性、透气性、顶破强力和抗起毛起球性进行测试,分析各因素对面料性能的影响。结果显示,组织结构、线圈长度、亲疏水纱线细度比对面料性能都有一定程度的影响。基于测试数据采用模糊综合评价对其进行综合评价与排序,综合性能最优的为采用三维导湿结构、线圈长度10.0 mm、亲疏水纱线细度比28∶50的面料。展开更多
基金supported by the National Natural Science Foundation of China(Nos.51407134,52002196)Natural Science Foundation of Shandong Province(Nos.ZR2019YQ24,ZR2020QF084)+1 种基金Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057)the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites)and Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave-absorbing Composite Materials and Construction of Shandong Provincial Talent Teams(No.37000022P990304116449)).
文摘In order to obtain high-performance electromagnetic wave absorbers,the adjustment of structure and components is essential.Based on the above requirements,this system forms a three-dimensional frame structure consisting of MXene and transition metal oxides(TMOs)through efficient electrostatic self-assembly.This three-dimensional network structure has rich heterojunction structures,which can cause a large amount of interface polarization and conduction losses in incident electromagnetic waves.Hollow structures cause multiple reflections and scattering of electromagnetic waves,which is also an important reason for further increasing electromagnetic wave losses.When the doping ratio is 1:1,the system has the best impedance matching,the maximum effective absorption bandwidth(EAB max)can reach 5.12 GHz at 1.7 mm,and the minimum reflection loss(RL_(min))is-50.30 dB at 1.8 mm.This provides a reference for the subsequent formation of 2D-MXene materials into 3D materials.
文摘基于仿生学,设计并开发具有不对称润湿梯度的新型三维导湿结构面料。将纬编间隔、双罗纹作为对比组织结构,设置9.5,10.0,10.5 mm 3种线圈长度,及细度比为28∶33、28∶50、28∶67的3种亲疏水纱线,设计编织9种面料;对其芯吸高度、透湿性、透气性、顶破强力和抗起毛起球性进行测试,分析各因素对面料性能的影响。结果显示,组织结构、线圈长度、亲疏水纱线细度比对面料性能都有一定程度的影响。基于测试数据采用模糊综合评价对其进行综合评价与排序,综合性能最优的为采用三维导湿结构、线圈长度10.0 mm、亲疏水纱线细度比28∶50的面料。
