Effect of Co-polyester antistatic agent modified by carbon nanotubes on the properties of polypropylene fibers

Antistatic polymer fibers were investigated by using carbon nanotubes （CNTs） to enhance the antistatic ability of inner antistatic agents based on the mechanism of attracting moisture by polar radical groups. It is indicated that the antistatic ability of the fibers filled with composite antistatic agents that contain CNTs and organic antistatic agents was superior to that of the fibers filled either with pure organic antistatic agents or pure CNTs. The antistatic ability of the composite antistatic agent fabricated by an in situ process was superior to that of the composite antistatic agent fabricated by direct dispersing CNTs in the antistatic agent carrier. Moreover, the heat-treated CNTs could further enhance the antistatic effect compared with the initial CNTs. The antistatic effect is significantly influenced by the content of CNTs in the composite antistatic agent.

Synthesis of Antistatic Composite Based on Reaction Flame Retarding Unsaturated Polyester Resin

The synthesis of reaction flame retarding unsaturated polyester resin and the flame retarding mechanism are investigated.By taking the synthesis flame retarding unsaturated polyester resin as a base material,glass fibers as reinforced material,under the condition of adding graphite or carbon black respectively,the composites were manufactured.The flame retarding and antistatic properties are also studied.In the experiment,bromide-bearing flame retarding resin decomposed under a high temperature.Compound HBr was set out and retarded or stopped the flame.High concentration of HBr gas wall was formed between gas and solid phrases,which decreased flame.The results show that antistatic property of carbon black is higher than that of graphite.Adding a threshed value of 1% carbon black into composite,the antistatic property is at its highest value.

Preparation and Application of Water Dispersible Graphene as Antistatic Agent for SMS Nonwovens

In this paper, glucose was used as a green reducing agent and a capping reagent in the synthesis of water dispersible graphene, while using exfoliated graphite oxide （GO） as the precursor with the modified Hummers method. Characterizations of the graphene were conducted by UV-visihle absorption spectroscopy and X-ray diffraction （XRD）. Then the spunlaid-melthlowing-spuulaid （SMS） nonwovens were treated with the graphene solution via pad-dry-cure process. The surface and the antistatic property of the obtained nonwovens were tested. The results showed that O. 1 mg/mL graphene solution exhibited good stability in water. When treated with this solution, the graphene could be evenly dispersed on SMS nonwovens and the nonwovens had an excellent antistatic performance and a high relatively antistatic durability.

Multiblock poly(ether-b-amide)copolymers comprised of PA1212 and PPO-PEO-PPO with specific moisture-responsive and antistatic properties

Functional multiblock poly(ether-b-amide)(PEBA)copolymers,comprised of PA1212(polyamide 1212)as hard segments and Jeffamine ED-2003 as soft segments,were successfully prepared via two-step melt polycondensation without any amidation catalyst.Here,using diamino-terminated poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide)(PPO-PEO-PPO),Jeffamine ED-2003,enhances the compatibility between polyamide oligomer and polyether,which is better than the traditional route using hydroxyl-terminated polyether.The chemical structure of multiblock PEBAs,as well as the microphase separated structure with crystalline phase of polyamide and polyether,were confirmed by heteronuclear multiple-bond correlation spectrum,heteronuclear multiple quantum correlation spectrum,Fourier transform infrared spectroscopy(FT-IR),differential scanning calorimetry and dynamic mechanical analysis.The hydrophilic PEBA copolymers showed water adsorption ranging from 87.3%to 17.1%depending on the polyether content,and specially showed moisture responsive behavior within seconds when exposed to moisture.The corresponding mechanism was studied using time-resolved attenuated total reflectance FT-IR spectroscopy in the molecular level and the water diffusion coefficient was estimated to be 1.07×10^(–8)cm^(2)∙s^(-1).Two-dimensional correlation FT-IR spectra analysis was performed to confirm that the interaction between water and polyether phase was in preference to that between water and polyamide matrix,and water molecule only forms hydrogen bond with the polyether segment.Due to the incorporation of PEO segments,the PEBAs have the surface resistivity varying from 5.6×10^(9)to 6.5×10^(10)Ω,which makes PEBA potential candidate as permanent antistatic agent.

Preparation and Properties of Light-colored Antistatic ATZO@TiO_(2)/PAN Fiber

Light-colored antistatic polyacrylonitrile(PAN)composite fiber was successfully prepared via a facile wet-spinning process using ATZO@TiO_(2)whiskers as conductive fillers.This kind of low-cost fiber meets the requirements of light-colored and antistatic ability,which is quite suitable for mass production of dust-proof and safety workwear.The conductive whiskers are well dispersed in the fiber and form a continuous conductive pathway,which makes the fiber to possess a long conductive ability.The lowest resistance of antistatic ATZO@TiO_(2)/PAN fiber was 2.1×10^(7)Ω·cm.

Preparation, Antibacterial and Antistatic Properties of PP/Ag-Ms/CB Composites

Polypropylene（PP） composites that contain silver micro-particles（MILLION KILLER, denoted as Ag-Ms） and conductive carbon black（CB） have both antibacterial and antistatic properties. In the present study, the antibacterial and antistatic PP/Ag-Ms/CB composites were prepared by melt blending. The results showed that when the content was 0.8 wt%, Ag-Ms could be uniformly dispersed in the PP matrix and the mechanical properties of the composites remained stable. And the reduction percentages of Staphylococcus aureus and Escherichia coli were more than 80% which showed the good antibacterial behavior. In addition, conductive carbon black had reinforcing and toughening effects on the mechanical properties of PP/Ag-Ms/CB composites. When the content of CB was beyond 30 wt%, the surface resistance of the composite was reduced to less than 108 Ω which showed a remarkable antistatic property. According to the different filling content of conductive carbon black, it can flexibly regulate the resistivity of PP, and the conductive effect is durable and stable. We thus can produce permanent antistatic materials.

Study of Blended Antistatic PET Filament

From the effects of the composition of the three kinds ofblended systems, the antistatic agent content and theblending methods on the spinnability, the antistatic prop-erty, and the wash fastness of PET filament, it is foundthat the antistatic behavior of the (PET) - (PEG) -(SDBS) - stearate quaternary system is improved greatlydue to the synergefic effect of the combined antistaticagents and the volume resistivity of the fiber made.Thereof reaches 10~8 ～ 10~9Ω·cm after being washed 20 tines in saponaceous water at 40℃. Its spinnability anddrawing behavior are good. The effect of the antistaticagent content on the mechanical property of PET fila-ment is also studied.

Surface resistivity of carbonaceous fiber/PTFE antistatic coatings

Abstract： PAN （Polyacrylonitrile）-based carbonaceous fibers were prepared at the heat treatment temperature （HTT） range of 650 to 900 ℃. The relationships among HTT, carbon content and volume resistivity of the carbonaceous fibers were investigated. The carbonaceous fibers/PTFE （Polytetrafluoroethylene） antistatic coatings were prepared by the spraying technology and the effects of carbonaceous fibers and pigments on surface resistivity of the coatings were systematically discussed. Micrographs provide insight into the antistatic mechanism of the coating. The results show that carbon content of the carbonaceous fibers increases from 68.8% to 74.8% （mass fraction） and the volume resistivity decreases drastically from 1.94× 10^-3 to 8.27× 10 ^-2.cm. The surface resistivity of the antistatic coating is adjustable between 10^5 and 10^8Ω2 to fit the different antistatic materials. Static is dissipated by a conductive network of short fibers and the tunneling effect between the neighboring fibers and conductive pigments. Conductive pigments make the conductive network more perfect and improve the antistatic ability, but insulating pigments acting as barriers for the formation of conductive channel increases the surface resistivity of the coatings. The influence of pigments on the surface resistivity drops gradually with the decrease of the carbonaceous fibers volume resistivity.

Antistatic coating material consisting of poly (butylacrylate-co-styrene) core-nickel shell particle

A transparent and antistatic coating material consisting of polymer core-metal shell particle was prepared. As a polymer core, poly(butylacrylate-co-styrene)s ([P(BA-co-sty)s]) with various compositions of butylacrylate and styrene were synthesized by emulsion polymerization. And the effect of comonomer composition on the thermal property of polymer core particle was investigated. By electroless plating method, the nickel particles were formed and deposited on the surface of P(BA-co-Sty) particles to form P(BA-co-Sty) core-nickel shell composite particles. SEM observation confirms that the nickel particles with size of 15 nm are distributed on the surface of the polymer core particles. The surface resistance of P(BA-co-Sty) core-nickel shell composite is 0.8×108Ω/cm2, enough to act as antistatic coating material.

An antistatic agent based on polyionic liquid applied to nylon 6

In order to improve the electrical conductivity of nylon 6(PA6)and avoid misfires and explosions caused by static charge accumulation,a quaternary ammonium salt polyionic liquid(PIL)antistatic agent was synthesized in this paper.The surface resistance of PA6 was reduced to 10~8Ωwith the addition of 2 wt%antistatic agent,and the mechanical properties and aging resistance of the substrate were improved.Meanwhile,the morphology and crystallinity of PIL/PA6 composites were further characterized by scanning electron microscope(SEM),energy dispersion spectrometer(EDS)and X-ray diffraction(XRD).It is worth noting that the quaternary ammonium salt polyionic liquid antistatic agent synthesized in this paper has the advantages of excellent antistatic effect,durability,low cost,and simple reaction condition,so it has a broad application prospect in the antistatic aspect of PA6.

Synthesis and characterization of Sb-doped SnO_2-(CeO_2-TiO_2) composite thin films deposited on glass substrates for antistatic electricity and UV-shielding

Sb-doped SnO2(ATO)-(CeO2-TiO2) thin Films were deposited on glass substrates using the mixed solution including CeO2-TiO2 precursor and ATO particles by sol-gel dip coating process.ATO particles were prepared using low-temperature hydrothermal process.The mixed molar ratio of ATO to(CeO2-TiO2) vs the properties of CeO2-TiO2 thin film was investigated.The optical properties of the films were characterized by UV-visible transmission and infrared reflection spectra,the sheet resistance of ATO particles and films were measured by rubber sheeter(MYI-50) and four-point probe(HisuperGroup Inc,SDY-5),the surface morphology and structure of the films were analyzed using 3D Digitale Mikroskop and X-ray diffraction(XRD),respectively.The results showed that the ATO precursor solution lost weight completely at about 500 oC,and the ATO particles was obtained,which indicated the same rutile lattice structure as SnO2.The glass substrates coated with ATO-(CeO2-TiO2) thin films showed better properties in antistatic electricity(104-106 Ω/),shielding UV(almost 100%),visible light transmission(70%) and infrared reflection(】30%).

Antistatic PVC-graphene Composite through Plasticizer-mediated Exfoliation of Graphite

Multilayer graphene was prepared by mechanical exfoliation of natural graphite with dioctyl phthalate （DOP） as milling medium without solvent. The obtained mixture could be directly mixed with poly（vinyl chloride） （PVC） for melt-forming, with DOP acting as plasticizer and graphene acting as conductive filler for antistatic performance. The composite showed surface resistance of 2.5 ×10 6 Ω/ at 1 wt% carbon additive, significantly lower than approx. 7 wt% of raw graphite required for achieving the same level. This value is low enough for practical antistatic criterion of 3 × 10 8 Ω/ . The effect of filler addition on mechanical performance was minimal, or even beneficial for the milled carbon in contrast to the case of raw graphite.

A Facile Modifier-free Approach to Fabricate Antistatic Superhydrophobic Composite Coatings with Remarkable Thermal Stability and Corrosion Resistance

Research on antistatic superhydrophobic surfaces has attracted widespread attention in some fields.However,in the application of superhydrophobic materials,fabricating stable and practical superhydrophobic surfaces through facile and low-cost approaches still faces considerable challenges.Herein,a polyphenylene sulfide(PPS)-based antistatic superhydrophobic composite coating with a high water contact angle(166°)and a low sliding angle(2°)was fabricated on a Q345 steel surface through a simple spray-coating method without any modifier.Furthermore,the as-prepared superhydrophobic coating also displayed excellent superhydrophobicity for water droplets at different pH values,as well as self-cleaning,anti-fouling and anti-icing properties.Importantly,the superhydrophobic coating still exhibited superhydrophobicity after calcination at 350°C for 1 h,indicating its outstanding thermal stability.Excellent antistatic and anticorrosion properties were obtained on the prepared coating surface,which allows the coating to be applied under harsh conditions.Benefiting from the above characteristics,compared with the commercial coating,the as-obtained antistatic superhydrophobic coating may be applied more widely in related fields.

Antistatic Structural Color and Photoluminescent Membranes from Co-assembling Cellulose Nanocrystals and Carbon Nanomaterials for Anti-counterfeiting

Static charges on optical ant-counterfeiting membranes may lead to materials structural changes,dust stain aggravation,and misreading of optical information.Incorporating conductive particles is a common way to transfer accumulative charges,but the key issue is how to achieve high dispersion and effective distribution of particles.According to the strategy of assembly-induced structural colors,cellulose nanocrystals(CNCS)were employed as a solid emulsifier to stabilize hydrophobic carbon nanoparticles(CNPs)in aqueous media;subsequently.by solvent evaporation-modulated co-assembly under a condition of 30°C and 20 RH%,the binary suspensions containing 2wt% CNC and CNPs with the equivalent concentration relative to CNC ranged from 1:40 to 1:10 were used to prepare antistatic composite membranes.Surface chemistry regulation of CNCs was applied to optimize the dispersiblity of CNPs and the orientation of assembled CNC arrays,and the hydrophilic CNCS were more favorable for dispersion and assembly of binary suspension systems.Meanwhile,one dimension carbon nanotube(CNT)and zero-dimension carbon black(CB)were found to show better dispersibility than two dimension graphene,which was verified by a semi-quantitative theoretical study.Moreover,the stable binary systems of CNT/CNC and CB/CNC were chosen for co-assembly as membranes,and the uniaxial orientation could be optimized as the fll-width of 9.8°at half maximum deviation angle while the surface resistivity could also drop down to 3.42 × 102 Qcmcm-1.The structural color character of such paper homology and antistatic integrated membranes contributes to optical information hiding and-reading,and shows great potential as optical mark recognition materials for electrostatic discharge protective packaging and anti.counterfeiting applications.

A Novel Ternary Composite of Polyurethane/Polyaniline/Nanosilica with Antistatic Property and Excellent Mechanical Strength:Preparation and Mechanism

Antistatic and strength properties are of vital importance for polyurethane rubber used in moving parts of many industrial instruments.Herein,polyurethane was composited with polyaniline and nanosilica based on in situ synthesis of polymer and physical mixing of these fillers to reach desired antistatic and mechanical properties.Chemical,morphological and thermal properties of the polyurethane/polyaniline/nanosilica composites were studied.The electrical resistivity of the composite decreased from 1.1×10^(6)MΩto 7.6×10^(4)MΩas a result of the addition of 4%polyaniline.The tensile strength and elongation at break of the polyurethane composites improved by nearly 300%and100%,respectively,when compared with those of the neat polyurethane.The electronic resistance of PU/PANI/NS ternary is low enough for its antistatic property and decreases with the increase of the added nanosilica,which is unexpectedly and rather significant.Our results would shed light on the development of antistatic PU with excellent mechanical performance.

All-Atom Molecular Dynamics Simulation of Structure and Diffusion of Hydrophilic Antistatic Agents in Polypropylene

Glycerol monostearate(GMS)is an additive widely used in plastic industry for its good ability to improve the wettability and antistatic property of polymer surfaces.Based on GMS,we propose five additives of different polar-ity by attuning the number of oxyethyl groups.All-atom molecular dynamics simulations of these additives in poly-propylene(PP)matrix are carried out at temperatures of 300 K,350 K and 400 K.Detailed molecular conforma-tions are obtained and analyzed.Due to the gauche effect of the dihedral angles,the polar parts of these additives form helix structures.The diffusion coefficient of the additives depends on their molecular conformations and de-creases monotonously with increasing polarity.

地球静止轨道LAR防静电白漆太阳吸收比变化分析

LAR防静电白漆具有低吸收发射比,能够喷涂于不同形状的物体表面,是重要的航天器热控系统组成部分。文章收集2颗地球静止轨道卫星的相机遮光罩外表面喷涂LAR防静电白漆的在轨7年和4年数据,结合遮光罩在轨热分析模型,得到白漆太阳吸收比随在轨时间的变化规律。研究结果表明:在轨2年后,白漆太阳吸收比由0.200退化为0.330,5年后变为0.357,年退化率由7.90%降低至0.55%,呈现逐年减小的趋势;根据该退化模型,预测10年后白漆太阳吸收比为0.357。利用热分析模型及在轨数据,能够得到白漆在轨退化性能,为航天器热控设计提供数据支撑,满足航天器长寿命及高效散热的需求。

抗菌抗静电SAN材料的制备及应用

以苯乙烯-丙烯腈共聚物(SAN)、无机抗菌剂、抗静电剂、相容剂、润滑剂和玻璃纤维为原料,使用双螺杆挤出机通过熔融共混法制备了兼具抗菌和抗静电功能的SAN材料,拓宽了其应用功能。研究了抗菌剂种类、抗静电剂种类、相容剂用量及润滑剂用量对材料性能的影响。结果表明,相比银离子抗菌剂和银锌复合离子抗菌剂,锌离子抗菌剂对SAN材料具有更好的广谱抗菌效果;3种聚氧乙烯类高分子抗静电剂中,使用6500为抗静电剂时,SAN材料的表面电阻率最低,力学性能最好;当加入质量分数5.0%相容剂苯乙烯-马来酸酐共聚物(SMA)时,材料的综合性能最好;当加入质量分数0.5%的润滑剂双极性乙撑双脂肪酸酰胺(TAF)时,材料的综合性能最好。当锌离子抗菌剂Z30用量0.5%、抗静电剂6500用量10.0%、相容剂SMA用量5.0%、润滑剂TAF用量0.5%时,材料抗菌率达到99.9%,防霉0级,抗白色念珠菌性能优异,表面电阻率1.8×10^(10)Ω,拉伸强度达到96.3 MPa,弯曲强度达到127.5 MPa,弯曲模量达到7253.4 MPa,缺口冲击强度达到6.8 kJ/m^(2);该功能材料已在空调贯流风扇叶上得到应用。

典型添加剂对3号喷气燃料热氧化安定性的影响原因分析及对策

热氧化安定性是喷气燃料的一项重要性能指标。抗静电剂和抗磨剂是工业喷气燃料调和过程中必须要加入的两种添加剂,而在市场中常用的添加剂分别是抗静电剂Stadis和抗磨剂T-1602。通过研究抗静电剂Stadis和抗磨剂T-1602对喷气燃料热氧化安定性的影响因素,包括空气、光照、存储温度等条件,对喷气燃料在实际生产过程中的调和、存储和使用安全都有非常重要的意义。研究结果表明:抗静电剂Stadis对喷气燃料热氧化安定性基本没有影响。抗磨剂T-1602影响喷气燃料热氧化安定性的因素有含氧的环境、光照、储存温度、添加剂浓度和储存材质等。随着储存温度的升高,含抗磨剂喷气燃料母液的热氧化安定性变差。随着抗磨剂添加浓度逐渐提高,含抗磨剂母液的喷气燃料热氧化安定性逐渐下降。通过采取对喷气燃料配置过程中增加氮封隔绝空气、避免光照、罐存储温度按照不大于40℃等措施,可最大程度降低喷气燃料热氧化安定性超标的质量风险,为喷气燃料的安全使用提供合理保障。

阻燃永久抗静电型TPAE复合材料的制备

研究将聚酰胺弹性体(TPAE)、氮磷系阻燃剂和聚季铵盐永久抗静电剂,通过双螺杆挤出机进行共混、熔融、挤出,制备得到阻燃抗静电的TPAE复合材料,考察其导电、阻燃和力学性能。结果表明:随着抗静电剂的增加,TPAE材料的表面电阻率呈降低趋势;氮磷系阻燃剂可使TPAE材料的阻燃等级达到UL94-V0级。