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A judicious approach to induce large size growth of hydroxyapatite via applying graphene modified silicon nitride nanowires
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作者 Lina Sun Leilei Zhang +1 位作者 Ruonan Zhang Hejun Li 《Journal of Materiomics》 SCIE CSCD 2024年第2期490-498,共9页
Mimicking the structure of natural bone collagen fibers/hydroxyapatite(HA)to synthesize large size of HA for accelerated bone repair remains a challenge.Herein,silicon nitride nanowires(SN)-graphene(GE)was designed by... Mimicking the structure of natural bone collagen fibers/hydroxyapatite(HA)to synthesize large size of HA for accelerated bone repair remains a challenge.Herein,silicon nitride nanowires(SN)-graphene(GE)was designed by the chemical vapor deposition,forming SN-GE(SG)similar to collagen fibers.Then,the large size HA was assembled onto SG by pulsed electrochemical deposition,the SG/HA(SGH)mimics the collagen fibers/HA structure of bone.The introduction of SG induces HA to large size grow in the form of coral-like.HA can be grown on a large size inextricably with the existence of GE modified layers.On the one hand,the upright GE sheets effectively increases the surface roughness which enhances the nucleation site of HA.On the other hand,the C=O provides chemical bonding and induces HA nucle-ation.Compared with SN/HA(SH),the porosity of SGH decreased by 71%.The average diameter of the SGH is(9.76±0.25)mm.Compared with SH,the diameter of SGH is 22 times larger than the diameter of SH.Indicating that SG induces large size growth of HA.Our work can provide a general strategy for the efficient preparation of biological scaffolds with large size HA that can be used in bone tissue engineering. 展开更多
关键词 HYDROXYAPATITE GRAPHENE Large size silicon nitride nanowires Bone tissue engineering
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Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers coupled withhydroxyapatite nanosheets as reinforcement for carbon matrixcomposites with boosting mechanical and friction properties 被引量:3
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作者 Lina Sun Leilei Zhang +4 位作者 Xuemin Yin Yeye Liu Yao Guo Hongchao Sheng Xianghui Hou 《Journal of Materiomics》 SCIE CSCD 2023年第1期197-205,共9页
Extensive attention has been drawn to the development of carbon-matrix composites for application in the aerospace and military industry,where a combination of high mechanical strength and excellent frictional propert... Extensive attention has been drawn to the development of carbon-matrix composites for application in the aerospace and military industry,where a combination of high mechanical strength and excellent frictional properties are required.Herein,carbon-matrix composites reinforced by Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers(Si_(3)N_(4nws)@PyCnls)coupled with hydroxyapatite nanosheets is reported.The Si_(3)N_(4nws)@PyCnls(SP)with coaxial structure could increase the surface roughness of Si_(3)N_(4nws)and promote the stress transfer to the carbon matrix,whereas the porous hydroxyapatite nanosheets favor the infiltration of the carbon matrix and promote the interfacial bonding between the SP and carbon matrix.The carbon matrix composites reinforced by SP coupled with hydroxyapatite nanosheets(Si_(3)N_(4nws)@PyCnls-HA-C)exhibit excellent mechanical strength.Compare with the conventional Si_(3)N_(4nws)reinforced carbon composites,Si_(3)N_(4nws)@PyCnls-HA-C(SPHC)have 162%and 249%improvement in flexural strength and elastic modulus,respectively.Moreover,the friction coefficient and wear rate decreased by 53%and 23%,respectively.This study provides a co-reinforcement strategy generated by SP coupled with hydroxyapatite nanosheets for effective improvement of mechanical and frictional properties of carbon matrix composites that are used for aerospace and military industry applications. 展开更多
关键词 silicon nitride nanowire Coaxial structure Hydroxyapatite nanosheet Mechanical strength Friction performance Carbon matrix composites
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Thermal insulating and fire-retardant Si_(3)N_(4) nanowire membranes resistant to high temperatures up to 1300℃ 被引量:1
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作者 Yeye Liu Leilei Zhang +4 位作者 Ruonan Zhang Siqi Shao Lina Sun Xinyi Wan Tiantian Wang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第24期82-88,共7页
Superior thermal insulating and fire-retardant ceramic membranes are urgently demanded in the aerospace,construction,and chemical engineering industries.However,the generic characteristics of ceramic membranes,such as... Superior thermal insulating and fire-retardant ceramic membranes are urgently demanded in the aerospace,construction,and chemical engineering industries.However,the generic characteristics of ceramic membranes,such as brittleness,structural collapse,and crystallization-induced pulverization behavior,present a great plague to their practical applications.Herein,we report a highly flexible,mechanically stable,fire-retardant,and high-temperature-resistant ceramic membrane based on the interlocked Si_(3)N_(4) nanowires formed by the precursor pyrolysis method.The Si_(3)N_(4) nanowire membrane(SNM)has excellent high-temperature resistance under alcohol lamps and butane spray lance.The thermal insulation with a thermal conductivity as low as 0.056 W m^(-1)K^(-1)can be attributed to the high porosity of SNM,which makes it a desirable candidate for heat insulators under harsh conditions.More importantly,SNM exhibits thermal stability and robust mechanical properties in the range of 25 to 1300℃.The high-temperature resistance of SNM up to 1300℃is achieved by the four stages:Si3 N4 nanowires,Si_(3)N_(4)@SiO_(2) nanowires,SiO_(2) nanowires,and bead-like SiO_(2) nanowires.After heat-treated at 1300℃,the macroscopic size of SNM does not change significantly,and the interlocked structure is still maintained.Furthermore,SNM still maintains excellent mechanical properties,with tensile strength as high as 0.26 MPa.This work provides a facile method for fabricating excellent thermal insulating and fire-retardant ceramic membranes,showing prospective application prospects in the era of thermal insulating materials. 展开更多
关键词 silicon nitride nanowires Thermal insulation Fire-resistance High-temperature resistance
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