Study on property of PANI/PET composite conductive fabric

Polyester (PET) fabric was treated with alkali and low-temperature plasma. After that, polyaniline (PANI)/PET composite conductive fabric was prepared through in situ polymerization using aniline as monomer. The structural properties, conductivity, mechanical properties, and wash fastness of PANI/PET composite conductive fabric were studied and characterized. The results showed that the optimal polymerization conditions: the molar ratio of ammonium persulfate and aniline is 1:1 and the concentration of sulfuric acid is 1?mol/L. Under optimum conditions, the surface resistivity of PANI/PET composite conductive fabric was about 170?Ω. PANI particles enter into the fiber and the crystallinity of PANI/PET composite conductive fabric declines and amorphous region of PANI/PET composite conductive fabric increases. The breaking strength and breaking elongation of PANI/PET composite conductive fabric decrease compared with PET fabric. After being washed five times, the surface resistivity of PANI/PET composite conductive fabric is stable at 1450?Ω.     

UHMWPE/PANI复合导电纤维的制备及其性能

采用原位聚合法制备了UHMWPE/PANI复合导电纤维。探讨了氧化剂种类及过硫酸铵浓度对复合纤维电导率及表面形态的影响,并研究了UHMWPE/PANI复合纤维的化学结构及力学性能。结果表明：纤维表面形成的聚苯胺导电层赋予了纤维一定的导电性能,以过硫酸铵为氧化剂制得的复合纤维的导电性能最强,其电导率可达10-1S/cm;随过硫酸铵浓度的增加,复合纤维的电导率呈现先增后减的趋势,以30g/L时制得的复合纤维的电导率最高。复合纤维是基质纤维与聚苯胺的共混体系,且导电处理未引起基质纤维分子链结构的变化。导电处理后,纤维的断裂强度较未处理前有少量增加,断裂伸长率基本保持不变。     

过硫酸铵浓度对聚苯胺/镀银织物电极性能的影响

为了探究过硫酸铵（APS）浓度对化学镀银织物电极性能的影响,得到性能更加优异的织物电极,选用硝酸作为掺杂剂,苯胺（An）单体作为原料,过硫酸铵作为氧化剂,通过改变过硫酸铵浓度,采用原位化学聚合法在织物表面获得较厚的聚苯胺（PANI）沉积层,再利用超声波化学镀银制备导电织物,最后组装成织物电极。利用扫描电子显微镜和电极阻抗测试仪进行测试,得出氧化剂过硫酸铵浓度对聚苯胺/镀银织物电极性能的影响。结果表明:当硝酸浓度为0.5 mol/L,苯胺浓度为0.25 mol/L,过硫酸铵浓度为0.1 mol/L时,所制备镀银织物电极的导电性最好,与皮肤间的阻抗变化曲线更接近于医用Ag/Ag Cl凝胶电极,阻抗值相对最小,在5～100 Hz频率范围内的阻抗均在0.2 MΩ·cm²以下,远小于1 MΩ·cm²,可满足纺织干电极皮肤阻抗标准要求。随着过硫酸铵浓度的增加,制备的织物电极的性能呈下降趋势。     

导电涤纶纱连续制备工艺与性能

为提高涤纶的导电性能,以涤纶长丝纱为基材,采用基于苯胺原位聚合的连续导电方法,制备涤纶/聚苯胺（PET/PANI）复合导电纱。探讨了导电处理工艺氧化剂浓度、处理掺杂酸和苯胺的浓度及处理速度对导电纱导电性能的影响,并测定与分析了纤维的表面形貌、化学结构、热学性能及力学性能。结果表明：经导电处理后,ＰＥＴ纱线表面及内部包覆并填充了导电态PANI;反应液浓度及处理速度对PET/PANI复合导电纱的电导率有较大影响,制得的导电纱电导率最高可达1.5 S/cm以上;PANI的存在降低了PET的热稳定性;相比PET纱,PET/PANI复合导电纱的断裂强度和断裂伸长率有小幅增长,但初始模量却有较大的下降。     

PTT/PANI复合导电纤维的制备与性能

采用原位聚合法制备了PTT/PANI复合导电纤维,探讨了反应时间、等离子预处理、拉伸状态对复合纤维电导率的影响,并研究了PTT/PANI复合纤维的表面形貌、热学性能及力学性能。结果表明：纤维表面形成的聚苯胺导电层赋予了纤维优良的导电性能,其电导率可达10-2S/cm;对纤维进行氧气等离子预处理可明显提高复合纤维的电导率;反应时间对复合纤维的电导率也有较大影响;PTT/PANI复合纤维经拉伸后导电性能明显下降。复合纤维的热稳定性在高于430℃时优于基质纤维并在一定程度上提高了基质纤维的力学性能。     

基于天然纤维素的包装用导电纸复合材料的制备

摘译目前,含有导电聚合物的涂布纸在新型功能纸及其包装应用方面引起了极大的关注,如防静电和电磁屏蔽纸、墙纸以及抗菌纸。在用于包覆纤维的导电聚合物中,聚吡咯（PPy）由于具有低毒性、化学稳定性和商业可用性而成为一种优选的导电聚合物。此外,聚苯胺（PANi）作为另一类导电聚合物,由于具有高度p-共轭聚合物链、导电性、掺杂/脱掺杂过程中可逆的化学性能、不同的形貌、电化学性能和物理性能等特点,     

聚苯胺/棉复合织物的制备及其性能

以盐酸为掺杂剂,过硫酸铵(APS)为氧化剂,采用两步法制备了聚苯胺/棉复合织物.探讨了氧化过程中,过硫酸铵浓度对复合织物导电性能、电磁屏蔽效能以及聚苯胺质量增加率的影响,同时还利用衰减全反射法(ATR)、X射线衍射法(XRD)以及光学显微镜对聚苯胺/棉复合织物的红外光谱、结晶度以及表观形貌进行了分析和观察.结果表明,APS浓度为0.2 mol/L时,复合织物的导电性能和电磁屏蔽效能最好,且聚苯胺与棉织物结合良好,而氧化聚合后复合织物中棉纤维的晶型结构未发生变化,结晶度升高.     

聚苯胺/锦纶/氨纶复合导电织物的制备工艺

为制备导电性能良好的导电织物,开发出柔软性智能纺织品,详细介绍制备导电织物的原料、设备、方法及织物导电性能测试方法.以锦纶/氨纶经平绒针织物为基体材料,聚苯胺为导电材料,采用现场吸附聚合沉积法制备导电性良好的聚苯胺复合导电织物.通过单因素试验分析法研究盐酸浓度、过硫酸铵浓度、反应时间、反应温度等工艺条件对导电织物聚苯胺...     

Activation of Lactoperoxidase System in Milk by Glucose Oxidase Immobilized in Electrospun Polylactide Microfibers

ABSTRACT: In this study, glucose oxidase (GOX) was immobilized in polylactide (PLA) fibers that were used to activate the lactoperoxidase (LP) system in milk. The GOX‐containing microfibers were electrospun from emulsions prepared by dispersing aqueous GOX in PLA dissolved in a chloroform and N,N‐dimethylformamide blend, using sorbitan monopalmitate as an emulsifier. The enzymatic activity of GOX‐in‐PLA fibers (1100 ± 400 nm diameter) was more than 19 times higher than that of the GOX‐in‐PLA membrane formed by direct casting, due to the larger surface area of the electrospun fibers. The activation of LP in model solutions using GOX‐in‐PLA fibers provided a more sustained generation of antimicrobial OSCN^? than direct activation using H₂O₂. Preliminary evaluation on milk samples showed that the electrospun GOX‐in‐PLA microfibers are capable of activating the naturally present LP system, indicating that they may be promising for active food packaging applications to extend the shelf life of milk.     

柔性可穿戴氨纶/聚苯胺/聚氨酯复合材料的应变传感性能

为制备得到电导率高且稳定性好的应变传感器,采用原位聚合法制备了氨纶/聚苯胺复合导电纤维并分析了其结构与性能;以复合导电纤维和水溶性聚氨酯为原料,制备了氨纶/聚苯胺/聚氨酯复合材料,研究了其在不同拉伸状态下的应变传感性能。结果表明:氨纶纤维表面形成一层致密的聚苯胺导电层,其电导率达到0.626 S/cm;氨纶/聚苯胺复合导电纤维的往复拉伸可造成纤维表面聚苯胺导电层的破坏,影响其应变传感性能的重复性;聚氨酯的保护提高了氨纶/聚苯胺/聚氨酯复合材料应变传感性能的重复性,在100%应变条件下,经10次拉伸和拉伸-回复后,复合材料的电阻值与初始值的比值较氨纶/聚苯胺复合导电纤维分别下降约66.7%和50.0%。     

聚苯胺/壳聚糖/羊毛复合织物导电性能及苯胺吸附分子模拟

为提高聚苯胺/ 羊毛复合织物的导电性能,采用原位聚合法利用醋酸和盐酸共掺杂一步合成聚苯胺/ 壳聚糖(PANI/ CTS) / 羊毛复合导电织物。借助场发射扫描电镜、X 射线光电子能谱仪和四探针测试仪对复合织物的结构和导电性能进行分析,研究了CTS 用量对复合织物导电性能的影响。采用分子模拟方法模拟苯胺吸附的微观运动,进一步研究了CTS 增强PANI/ 羊毛复合织物导电性能的微观机制。结果表明：当CTS 用量为2. 05% (o. w. f)时,PANI/ CTS/ 羊毛复合导电织物的电导率达到11. 32 S/ cm;羊毛角蛋白分子表面非均匀电场分布导致苯胺非均匀吸附,而CTS 氨基质子化有助于弱电场区域的苯胺吸附,使得苯胺整体吸附量更多,均匀度更好,聚合形成更加均匀、致密的PANI 层,提高了复合织物的导电性能。     

Preparation and characterization of Paraloid B-72/TiO2 nanocomposite and their effect on the properties of polylactic acid as strawberry coating agents

In this study, Paraloid B-72 (poly methyl methacrlylate/ethylacrylate 70:30) and its nanocomposites with titanium dioxide (TiO₂) concentration 1–5% have been prepared by emulsion polymerization technique and characterized by transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FT-IR) in addition to antimicrobial activity against Aspergillus niger and Penicillium sp. The prepared Paraloid B-72 and its titanium dioxide nanocomposites was grafted onto polylactic acid (PLA) and the results indicate that the grafting percentage reached to maximum value using the nanocomposite of Paraloid B-72 with 3% TiO₂. PLA grafted with Paraloid B-72/3% TiO₂ has been characterized by scanning electron microscope (SEM), FT-IR as well as mechanical and color change measurements. The results show that incorporation of Paraloid B-72 / TiO₂ improved the properties of PLA. The produced PLA grafted Paraloid B-72 and its 5% titanium dioxide have been used for coating strawberry to enhance and control the cold storage at 4°C for 15 days.     

聚苯胺反应配比条件选择的研究

研究氧化剂浓度、介质酸度对聚苯胺合成产率及电导率的影响。利用正交试验初步得到合成聚苯胺的最佳配比条件为:苯胺与氧化剂过硫酸铵的摩尔比为1:1,介质盐酸的浓度为1.5mol/L,在此条件下聚苯胺产率91％,电导率3.56S/cm。     

CPAM/PAE水包水乳液的制备及其对纸张增强作用的研究

以聚酰胺多胺环氧氯丙烷树脂（PAE）、甲基丙烯酰氧乙基三甲基氯化铵（DMC）、丙烯酰胺（AM）、硫酸铵为主要原料,在过硫酸钾的引发下合成了CPAM/PAE水包水乳液,并作为纸张增强剂进行了应用。考察了各因素对乳液稳定性及纸张增强性能的影响。在60℃,PAE、AM、DMC及硫酸铵的质量百分数分别为4.2%、14%、5.6%及3.36%的较优条件下反应6h,合成的水包水乳液性能稳定,当其用量为绝干浆的0.1%时,纸张干抗张强度提高了131%,湿强度提高了28%。     

聚苯胺接枝石墨烯复合材料的制备及电化学性能

为了提高聚苯胺和石墨烯复合材料的循环稳定性,采用改进Hummers法制备氧化石墨烯(GO),以氯化亚砜对羧基进行酰氯化的同时还原其他含氧基团,然后对酰氯进行氨基化改性,在此基础上以苯胺原位氧化聚合法制备聚苯胺接枝石墨烯复合材料(rGO-PANI)。采用扫描电镜(SEM)、红外光谱(FTIR)、X射线衍射光谱(XRD)、拉曼光谱(Raman)和紫外可见光谱(UV-Vis)表征其形貌和结构。采用四探针测试仪测试其导电性,电化学工作站测试其电化学性能,并与非接枝型聚苯胺/石墨烯复合材料(rGO/PANI)进行比较。结果表明:rGO-PANI中的聚苯胺以共价键与石墨烯连接,循环稳定性得到提高,在循环100次后比电容量仅损失5%(而非接枝型损失15%);具有良好的导电性,电阻率可达0.3Ω·cm;具有良好的电荷存储性能,比电容量可达603 F/g。     

应用原位聚合法的PTT/毛/聚苯胺复合导电纱制备与性能

本文采用了一种新颖的基于原位聚合法的连续制备导电纱线的方法,以PTT/毛混纺纱为原料,制备了PTT/毛/PANI复合导电纱线,探讨了反应液浓度对复合导电纱电导率的影响,并研究了PTT/毛/PANI复合导电纱的表面形貌、化学结构及力学性能。研究结果表明：随着反应液浓度的提高,复合导电纱线中的聚苯胺含量增大,纱线的电导率提高,可达1.08×10-2S/cm;红外分析表明复合导电纱是PTT、羊毛与聚苯胺的共混体系;纱线经导电处理后,断裂强力、断裂伸长率与初始模量均有所提高,但屈服应力和屈服伸长率都有一定程度的下降。     

含氟丙烯酸酯防水剂的合成及应用

以甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）为单体,脂肪醇聚氧乙烯醚（AEO-9）和十二烷基硫酸钠（SDS）为复合乳化剂,过硫酸铵（APS）为引发剂,采用乳液聚合方法制备含氟防水整理剂乳液。结果表明：当m（BA）：m（MMA）=3：2,乳化剂用量为6％,引发剂用量为0．6％（均为对单体总质量）,制得的聚合物乳液外观透亮、细腻、稳定性好。经该防水整理剂整理后的棉织物对水的接触角可达140°。     

无皂乳液聚合法制备喷水织机用浆料的研究

探讨喷水织机适用浆料的制备方法。采用无皂乳液聚合方式,合成了醋酸乙烯酯、丙烯酸、丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸甲酯多元共聚物,探讨了油酸用量、过硫酸铵用量、反应温度对乳液稳定性、黏度、转化率以及浆膜水溶性的影响。结果表明:油酸和过硫酸铵用量分别为混合单体总质量的2.0%、0.5%,反应温度为75℃,共聚乳液具有良好的性能。     

柔性石墨烯/聚苯胺复合纤维的制备及电化学性能

为了开发柔性石墨烯基功能复合纤维材料,分别制备了氧化石墨烯和盐酸掺杂聚苯胺,将两者混合后利用湿法纺丝制备了氧化石墨烯/聚苯胺复合纤维,并通过化学还原得到石墨烯/聚苯胺复合纤维。对所制备的复合纤维结构、力学性能及电化学性能进行了表征和测试分析。结果表明,所制备的石墨烯基复合纤维由石墨烯片堆叠的蜂窝状框架和包裹的聚苯胺颗粒构成,氧化石墨烯/聚苯胺复合纤维断裂伸长率高达14.92%,还原后仍可保持在5.57%,断裂强度为25.55 MPa,其比电容可达72.95 mF/cm 2。说明复合纤维具有良好的柔韧性和优异的电化学性能,为其在柔性电极、智能可穿戴方面提供了开发应用的潜力。     

Evaluating and empirical modeling of the electrocatalytic activity and morphology of electrospun polyacrylonitrile/polyaniline/tungsten trioxide nanofibers

Abstract

Electrically conductive polyacrylonitrile/polyaniline/tungsten oxide (PAN/PANI/WO₃) nanofibers were produced through an electrospinning method. The PAN polymer was used to enhance the spinnability of the polyaniline solution. The surface morphology and electrocatalytic properties of the mats were examined by scanning electron microscopy and electrochemical impedance spectroscopy method. Response surface methodology was applied to predict the relation between both the average diameters of the nanofibers and the charge-transfer resistance (R_ct) of nanofibrous mats with the concentration of polyaniline and tungsten oxide. Design-Expert7 software was selected for the response data analysis of the contour plots. Direct relation was observed between the average diameters of the nanofibers with WO₃ concentration in electrospinning solution. However, with increasing polyaniline content, the average diameters of nanofibers decreased. The results showed that both the PANI and WO₃ concentrations (%wt.) had significant effects on the nanofibers diameters. In the case of electrocatalytic activity, the increasing of both composite components in the spinning solutions had positive effect on the lowering of the charge-transfer resistance and the changes were statistically significant.