【摘 要】
：
针对废旧纺织品制备纤维素气凝胶存在强度低、脆性高、韧性差的问题,将废旧棉花溶解在氢氧化钠/尿素水溶液体系中得到棉纤维素气凝胶(CFA),然后将经编间隔织物(WKSF)与其进行原位复合,经冷冻干燥得到CFA/WKSF复合材料,并对其形貌、压缩和隔热性能进行分析与研究.结果表明:CFA/WKSF复合材料保持了气凝胶的多孔网状结构;WKSF的加入使CFA的力学性能得到提高,其中编链和衬纬结构WKSF的加入使得CFA的压缩弹性模量和屈服强度分别提高了180％和450％,六角形网孔结构WKSF的加入使得CFA的压缩
【机 构】
：
西安工程大学纺织科学与工程学院, 陕西西安 710048;西安工程大学功能性纺织材料及制品教育部重点实验室, 陕西西安 710048;东华大学纺织学院, 上海 201620
论文部分内容阅读
针对废旧纺织品制备纤维素气凝胶存在强度低、脆性高、韧性差的问题,将废旧棉花溶解在氢氧化钠/尿素水溶液体系中得到棉纤维素气凝胶(CFA),然后将经编间隔织物(WKSF)与其进行原位复合,经冷冻干燥得到CFA/WKSF复合材料,并对其形貌、压缩和隔热性能进行分析与研究.结果表明:CFA/WKSF复合材料保持了气凝胶的多孔网状结构;WKSF的加入使CFA的力学性能得到提高,其中编链和衬纬结构WKSF的加入使得CFA的压缩弹性模量和屈服强度分别提高了180％和450％,六角形网孔结构WKSF的加入使得CFA的压缩弹性模量和屈服强度分别提高了70％和312％;加入六角形网孔结构WKSF后,CFA/WKSF复合材料的导热系数相比CFA仅增加5％,仍具有良好的隔热性.
其他文献
Nuclear energy plays an important role in the long-term energy mix.According to World Nuclear Association(WNA),the nuclear power installation in China will approximate 400 GWe by 2050.To achieve high performance of the future nuclear reactors with respect
Nowadays,reliability is moving toward interdisciplinary research with ever-increasing connotations for full life-cycle system management,including system design,analysis,modeling,test,operation,optimization,etc.Meanwhile,complex systems,such as transporta
Cancer is a global public health threat and a leading cause of death in China.In 2020,the number of new cancer cases around the world reached approximately 19.3 million,and about 10.0 million cancer-related deaths occurred.Tumor diagnosis and treatment re
Between December 2020 and March 2021,SpaceX(Hawthorne,CA,USA)launched four prototypes of its Starship,a behemoth rocket intended to one day shuttle people to Mars.Yet,after reach-ing an altitude of several miles and executing a controlled belly flop back
Elaborate proof-of-principle experiments in several laboratories around the world have recently offered glimpses of a future in which high-throughput automatic laboratories guided by artificial intelligence(AI)might enhance the process for discovery of ne
Early detection of hepatocellular carcinoma(HCC)while in its early stages is critical for reducing HCC mortality in high-risk patients.However,highly sensitive and specific surveillance biomarkers for early-stage HCC detection are still lacking.In recent
Modern therapy of acute myeloid leukemia(AML)began in 1973 with the first report of the successful combination of daunorubicin and cytarabine,which led to complete remission in approximately 45％of patients.Accurate AML diagnosis was dependent on morpholog
为更好地筛选适用于超临界二氧化碳(ScCO2)流体染色的分散染料,使用状态方程结合基团贡献法和计算化学法,得到不同工况条件及不同染料结构对分散染料在超临界CO2流体中溶解度的影响规律,建立了分散染料在超临界CO2流体中溶解度预测方法.结果表明:不同工况条件会影响分散蓝79染料的溶解度,其中较低的温度和较高的压力对溶解过程更有利;从分子结构来看,蒽醌染料分子平面性更好,有利于 π-π堆积,故蒽醌类分散染料在超临界CO2流体中的溶解度比偶氮染料更低;降低染料内部分子间相互作用或提高染料与ScCO2流体间相互作
The Gesellschaft fur Anlagen-und Reaktorsi-cherheit(GRS)gGmbH as the main technical support organization for the German Federal Government in nuclear safety has been dealing with small modular reactors(SMRs)for about one decade since SMRs are one interest
In February 2021,during a massive blackout in Texas,USA,a man made the news for using his hybrid Ford F-150 pickup truck,a model equipped with a generator,to power his house for three days[1].Other hybrid F-150 owners followed suit,and Ford requested that