低方阻、高透光度复合透明导电膜的研制

摘要:针对低方阻、高透光度透明导电膜的要求,利用薄膜光学干涉原理,设计了ITO+Si02复合型的透明导电膜;研究了基底温度、沉积速率、充氧量等工艺参数对ITO膜的影响;利用优化的工艺参数成功制备了复合透明导电膜.测试结果表明,膜层性能优异,能够满足使用要求.     

巯基-双键点击反应制备光固化红光转光膜及其性能

本研究将不同含量的稀土转光剂与含巯基和双键单体共混制备了光固化树脂,然后经巯基-双键或双键-双键点击反应制备了两种农用转光膜,通过荧光光谱、UV光谱、SEM、拉伸性能测试等对转光膜的结构与性能进行表征。研究结果表明,添加0.5%(质量分数)稀土转光剂的转光膜能将波长为353 nm的紫外光转换为波长为613 nm和617 nm的红光,且该转光膜具有良好的透光性能和力学性能,拉伸强度达到12.72 MPa,在农业大棚、玻璃温室等方面具有良好的应用前景。     

UV光固化聚氨酯膜透湿性能研究

为增加UV光固化聚氨酯膜的透湿性能,研究了PET1000做致孔剂对UV聚氨酯光固化膜微孔性能的影响,通过对此种UV固化膜透湿性能、吸水率、孔隙率及扫描电镜等表征手段的分析,结果表明:加入PET1000作为致孔剂后,合成的UV固化膜的透湿性能,表面孔隙率、吸水率都有显著提高,综合考虑防水性能与透湿性能,PET1000含量为20%时,扫描电镜下观察的孔径为12~20μm,防止水滴进入,且UV固化膜透湿量可达1410g/(m2·24h)比未加PET1000的UV固化膜透湿性能增加了377%。     

基于丁香精油/β-CD包合物的PVA活性包装膜制备及性能研究

以丁香精油/β-CD包合物为活性成分,以PVA(聚乙烯醇)为成膜基材采用流延法制备活性包装膜,研究包合物添加对PVA膜抗菌性能和力学性能的影响。结果表明,包合物的添加可赋予PVA膜抗霉菌性能,当包合物添加量大于10%时,PVA活性包装膜可达到0级抗霉菌标准。包合物的添加量<20%时膜拉伸强度和断裂伸长率变化不显著;添加量为10%~15%时膜撕裂度相对于纯PVA膜显著增大。在PVA中添加10%的包合物可制备抗菌性能和力学性能均较佳的活性包装膜。     

肉桂精油-海藻酸钠可食性抗菌膜的研制

以海藻酸钠为成膜材料,并添加不同质量浓度的肉桂精油来制备可食性抗菌膜。根据膜的力学性能和抑菌性能,确定了可食性膜中添加海藻酸钠、甘油和肉桂精油的最佳质量分数,以及可食性抗菌膜的最佳干燥温度和干燥时间。实验结果表明：在海藻酸钠的质量浓度为20mg／mL,甘油的添加质量分数为1．0％,肉桂精油的添加质量分数为2．0％,干燥温度为50℃和干燥时间为4．5h的条件下,所制备的膜具有最佳的力学性能和抑菌性能。     

阳离子光固化高性能墨水直写浆料的研制

阳离子光固化材料通常具有低收缩、化学稳定性好、高力学性能等优点。为发展阳离子光固化型墨水直写打印技术（DIW），以双酚A二缩水甘油醚（DGEBA）为主体树脂，通过对触变剂、光引发剂和活性稀释剂的研究制备了一系列阳离子DIW打印浆料，并研究了该体系浆料的可打印性以及力学性能。结果表明，气相二氧化硅的添加可以有效调节浆料流变性能，使其满足DIW打印要求。当异丙基硫杂蒽酮（ITX）与二甲苯基碘鎓六氟磷酸盐（IOD（）摩尔比1:1）组成的光引发体系添加量为3%时，浆料固化速度最快。拉伸性能表征发现，打印样条的断裂伸长率随着OXT-BZ稀释剂的增加而增加，且拉伸强度保持在40 MPa以上，表现出优异的力学性能。通过对打印沟环器件的负载测试发现，该浆料对玻璃、铝合金等基材具有优异的附着性，可实现8 kg砝码的负载，展现了优异的力学性能。     

辛胺改性海藻酸钠薄膜的制备及理化性能研究

目的 为了提升海藻酸钠薄膜的力学性能和疏水性能。方法 以1–(3–二甲氨基丙基)–3–乙基碳二亚胺（EDC）/N–羟基琥珀酰亚胺（NHS）为催化剂，将辛胺（OA）通过酰胺化反应共价连接到海藻酸钠的分子中，利用疏水烃基链分子之间的“缔合作用”来提升海藻酸钠薄膜的力学性能，并且降低其水溶性。通过流延的方法制备辛胺改性海藻酸钠膜（OASA），探究辛胺的接枝率与成膜性能的关系，以及辛胺添加量对膜的力学性能、水溶性、水蒸气透过率、颜色及热力学性能的影响。辛胺改性海藻酸钠的分子结构通过红外光谱（FTIR）、核磁共振氢谱（1HNMR）得到证明；改性海藻酸膜的结构通过X射线衍射（XRD）和扫描电镜（SEM）进行分析。结果 在辛胺的接枝率为19.94%以下时，可以得到均匀透明的薄膜；与纯海藻酸钠薄膜相比，辛胺改性膜的拉伸强度和断裂伸长率分别提升了23.1%和35.5%；热力学数据表明，在最终加热温度为700℃时，残留量增加，最大失重速率对应温度下降，膜的热力学稳定性增加；辛胺改性膜的含水量、水溶性和水蒸气透过率比纯海藻酸钠薄膜分别下降了37.2%、17.5%和81.3%。结论 通过共价改性在海藻酸钠的分...     

基于硫醇-烯烃点击反应的苯并噁嗪紫外光固化树脂的性能研究

以二烯丙基双酚A制备了烯丙基苯并噁嗪(BA-mt),系统研究了基于硫醇-烯烃点击反应的烯丙基苯并噁嗪/三羟甲基丙烷三丙烯酸脂/三羟甲基丙烷三(3-巯基丙酸酯)(BA-mt/TMPTA/TMPMP)紫外光固化体系的机械性能和热性能。结果表明:紫外光固化树脂BA-mt/TMPTA/TMPMP的硬度和耐磨性随着BA-mt含量的增加而提高;随BA-mt用量的增加光固化膜的玻璃化转变温度也不断提高;光固化膜具有良好的耐热性能,光固化膜的初始热分解温度和残炭率都随着BA-mt含量的增加逐渐提高。当BA-mt含量为20%时,BA-mt/TMPTA/TMPMP光固化膜的铅笔硬度(6H)和耐磨性最好,玻璃化转变温度和初始热分解温度分别达到12.4℃和353℃。     

助剂对水性UV固化丝网印刷塑料油墨附着力的影响

在水性UV固化油墨中添加一定数量的助剂,会改变墨膜在聚酯塑料表面的附着力性能,实验中使用的助剂有聚乙烯吡咯烷酮、三乙醇胺和氨水,结果表明助剂对于光固化水性油墨在塑料表面的附着力有很大的提高.     

基于分子动力学模拟研究聚合物链排列对多层聚合物薄膜阻隔性能的影响

通过微纳层叠挤出技术制备聚丙烯(PP)多层膜,利用分子动力学模拟从微观分子链取向状态探究多层结构对PP薄膜阻隔性能的影响。实验结果表明,与PP单层膜相比,PP多层膜的阻隔性能明显提升,其氧气透过系数和水蒸气透过系数分别下降了23.9%和86.4%。通过分子动力学模拟构建了PP单层膜和多层膜的渗透率模型,通过渗透率模型比较了小分子通过PP单层膜和多层膜的扩散路径。结果发现,与PP单层膜相比,PP多层膜界面处的二维分子链取向使得其内部小分子扩散路径更加曲折,这是PP多层膜具有良好阻隔性能的重要原因之一。同时,通过PP单层膜与多层膜力学性能的对比实验分析,验证了渗透率模型的准确性。     

Performance of a write-once multilayer optical disk that uses transparent recording material with an optical switching layer

A volumetric optical disk that has multiple transparent films with optical switching layers is used as a recording medium to increase the number of recording layers. In the disk the optical switching layer is adapted to reduce decay of laser energy and increase reading and recording sensitivity. Well-defined marks of approximately 100-nm depth can be placed precisely on the transparent films by a focused laser beam. Writing and reading of a four-layer recordable disk, fabricated by molding and spin bonding, have been demonstrated experimentally. The volumetric disk can achieve a high recording capacity with conventional optical pickups.     

Write-once recording for multilayered optical waveguide-type holographic cards

We propose a write-once recording technique for multilayered optical waveguide-type holographic cards. The card medium has a construction created by adding a recording layer and a holographic grating layer to the multilayered optical waveguide composed of core and cladding layers. Individual data for each medium were recorded as an arrangement of optically transparent holes formed in the recording layer. Holograms common to all media were designed in the holographic grating layer so that diffracted lights from the holograms could pass through the holes and focus on an image sensor. We succeeded in write-once recording with a memory capacity potential of more than 128 bits.     

“局部透明”真空镀铝复合膜的研制工艺及应用问题分析

真空镀铝复合膜呈现"局部透明"的技术,依靠的是一种在特定工艺下能使铝层与基膜相互分离的透明涂料(或腊克)。而依据特定工艺使用的材料不同,该技术可分为"水洗铝"和"酸/碱洗铝"两种。然而,经过"局部透明"工序制得的镀铝复合袋,透明区域的铝层被洗除,仅剩基膜和热封膜复合,该部分的阻隔性较其他镀铝区域必然有所下降。倘若内容物对水、氧非常敏感,那么这种阻隔性的变化将会对内容物的品质产生重大影响,进而缩短相应的保质期。     

透明热敏记录材料制备技术

本文综述了当前透明性热敏记录材料制备技术，并重点阐述了该记录材料热敏层中的内含发色剂的微胶囊、难溶于水的显色剂及其溶液、具有优良防粘附性能保护层的制备技术。     

Relief gratings and microlenses fabricated with silicone

Divergent microlenses and low-spatial-frequency interference gratings have been fabricated in low-cost silicone layers. The size of the microlenses ranges from approximately 1 mm to 100 microm while spatial frequencies of interference gratings range from 4 to 18 l/mm. The fabrication method involves the recording of spatial distributions of mid-IR light. At recording time silicone layers are in a gel state. Then layers are cured by heat. The final silicone layers are transparent and rigid.     

Healable,Transparent, Room‐Temperature Electronic Sensors Based on Carbon Nanotube Network‐Coated Polyelectrolyte Multilayers

Transparent and conductive film based electronics have attracted substantial research interest in various wearable and integrated display devices in recent years. The breakdown of transparent electronics prompts the development of transparent electronics integrated with healability. A healable transparent chemical gas sensor device is assembled from layer‐by‐layer‐assembled transparent healable polyelectrolyte multilayer films by developing effective methods to cast transparent carbon nanotube (CNT) networks on healable substrates. The healable CNT network‐containing film with transparency and superior network structures on self‐healing substrate is obtained by the lateral movement of the underlying self‐healing layer to bring the separated areas of the CNT layer back into contact. The as‐prepared healable transparent film is assembled into healable transparent chemical gas sensor device for flexible, healable gas sensing at room temperature, due to the 1D confined network structure, relatively high carrier mobility, and large surface‐to‐volume ratio. The healable transparent chemical gas sensor demonstrates excellent sensing performance, robust healability, reliable flexibility, and good transparency, providing promising opportunities for developing flexible, healable transparent optoelectronic devices with the reduced raw material consumption, decreased maintenance costs, improved lifetime, and robust functional reliability.     

正交异性钢桥面疲劳开裂研究

正交异性钢桥面板的钢结构桥梁在车辆荷载作用下易出现疲劳开裂,为了解决这一问题,该文采用在正交异性钢桥面板上设置薄层RPC(Reactive-Powder-Concrete)超高性能混凝土层,将钢桥面转变成组合桥面,从而提高了桥面刚度,能有效改善结构受力状态,且不会增加桥梁上恒载重量。通过对某大桥的计算分析表明:采用组合桥面后,车辆荷载作用下的钢桥面应力大幅度下降。钢桥面疲劳敏感点处的拉应力降幅达到71.32%~72.39%,大幅度的提高了钢桥面的抗疲劳寿命;薄层RPC面板的高强度和高韧性,完全能满足组合桥面的最大拉应力10.08MPa的强度要求,成为钢桥面上的永久结构层,可以大幅度降低钢桥面板的开裂风险。     

Thermal stability improvement for longitudinal magnetic recording media

This paper reports and discusses the effects of M/sub r/t cancellation and bottom/top magnetic layer thickness ratio on thermal stability and recording characteristics of low-noise synthetic antiferromagnetic (SAF) longitudinal recording media. It is shown that by proper design and process, SAF media with low M/sub r/t cancellation can deliver excellent overall recording performance with acceptable thermal stability. We present a unique approach to significantly improve the thermal stability of SAF media with low M/sub r/t cancellation by adjusting the bottom/top magnetic layer thickness ratio. Increasing the bottom/top magnetic layer thickness ratio significantly improves amplitude decay rate and media coercivity temperature dependence with little sacrifice in recording performance.     

A proposed beam-addressable memory

The feasibility of optical beam-operated magnetic storage systems is assessed. Recent advances in laser technology and in transparent magnetic materials are described along with methods for writing and reading information. In the writing process, thermomagnetic recording on thin films is considered and the writing speed and resolution is calculated, illustrating the large performance improvement obtainable compared with existing magnetic recording techniques. The progress in materials, beyond the previously used metals, has developed towards more transparent magnetic media while retaining large intrinsic magneto-optical rotation. Consequently, large signal-to-noise ratios are obtained which relax the material uniformity requirements. The properties of ferrites, garnets, and rare-earth compounds are compared with metals to illustrate this advance. At the present time, technical problems exist with a light beam in achieving random access to a large field. This limitation is alleviated, however, in certain types of memories where the access requirements combine sequential and random motions. As an example, a prototype memory is discussed for a computer input-output system having certain performance advantages. In this memory, sequential access is achieved with a rotating mirror and random access by means of a digital light-deflector.     

Terabyte recorded in two-photon 3D disk

1 Tbyte of data has been recorded in 200 layers inside the volume of one of our two-photon 3D disks. Each layer contains 5 Gb of data similar to the capacity of a single layer DVD. The results obtained with our high-performance 1.0 numerical aperture (NA) objective lens show a full disk recording of 1 Tbyte within a standard optical disk form factor 120 mm x 1.2 mm thick utilizing our very stable and efficient materials. Very high sensitivity materials are recorded with bit energies as low as 250 pJ/bit. Materials sensitive at 405 nm are experimentally tested by recording with a 405 nm Nichia laser diode. Results show that bit dimensions are further reduced, which enables future recordings of 5 Tbyte disk capacities by recording 25 Gb/layer, the equivalent of a Blu-ray disk capacity per layer.