聚乙烯醇薄膜的红外吸收特性与保温性的关联

将聚乙烯醇(PVA)、聚乙烯(PE)、乙烯-乙酸乙烯酯共聚物(EVA)吹制成膜,分别研究了三种薄膜的光学性能、红外透射率及其对农业温室增温、保温能力的影响。PVA薄膜雾度值较PE和EVA薄膜分别降低了15%和12%,可有效提升薄膜覆盖温室的白日增温能力;在温室夜晚辐射散热集中的7～14μm波长范围内,PVA薄膜的红外透射率仅为16.2%,比EVA棚膜低20%,比PE棚膜低50%,PVA薄膜覆盖温室可大幅提高温室保温能力。     

聚四氟乙烯薄膜的制备及其红外光谱研究

用射频磁控溅射方法分别在NaCl和Si基底上制备了聚四氟乙烯薄膜．通过红外吸收光谱的研究分析了薄膜中的成分及分子链结构． 关键词：     

水滑石对农膜性能影响的红外光谱研究

使用红外光谱仪分别研究了进口水滑石、国产水滑石以及滑石粉对农膜光学性能、透光率、红外阻透率和保温性能的影响。结果表明国产水滑石粒径大于进口水滑石,制品雾度值上升1.5%左右。与常用的滑石粉相比,水滑石所制农膜的红外阻隔效果更好。从红外光谱图看出,国产或进口水滑石在1 100～1 200 cm-1波数范围内没有红外吸收, 吸收峰值在1 360 cm-1波数处, 与吸收能量最强的9～11 μm波长处有一定偏移,因此添加到农膜中作保温剂还有待于进一步研究。     

电子束蒸发制备氮化硼薄膜的红外光谱研究

用电子束蒸发法制备氮化硼薄膜, 分别研究束流大小和蒸发时间长短对薄膜质量的影响, 薄膜以红外吸收光谱标识。实验结果表明, 束流大小和蒸发时间长短对薄膜质量都有影响, 经过900℃氮气保护退火后, 都得到了高立方相含量的氮化硼薄膜。     

氮化硼薄膜的红外光谱研究

用磁控溅射法制备六角氮化硼薄膜,在衬底温度、衬底偏压、工作气压等条件一定的情况下改变工作气体(氮气+氩气)中氮气的比例,以制备高质量的六角氮化硼薄膜,薄膜以红外吸收光谱标识。实验结果表明,工作气体中氮气的比例对制得的六角氮化硼薄膜有很大影响,在氮气比例为20%时得到理想的六角氮化硼薄膜。     

聚乙烯薄膜材料的红外光谱研究

由于红外吸收光谱法具有许多突出的优点,因此它在许多领域有广泛的应用。在薄膜、合成纤维、橡胶、塑料等高聚物的研究方面,用于单体、聚合物、添加剂的定性、定量和结构分析。一般高聚物的红外光谱中谱带的数目很多,而且不同种类的物质其光谱很不相同,特征性很强。此外红外光谱法的制样和实验技术相对比较简单,它适用于各种物理状态的样品。本实验研究以高聚物薄膜材料做样品,对样品高聚物进行红外光谱分析,分析表明,本实验所用样品高聚物成分为聚乙烯材料,这个实验结果也表明,用红外光谱法鉴定高聚物的组成非常有效。红外光谱法用于定量组分分析,与其它测量方法相比,具有制样简单方便、重复性好和测量精度高的特点。     

纳米多孔SiO2薄膜的制备与红外光谱研究

以正硅酸乙酯为原料,采用溶胶-凝胶法,结合旋转涂胶、超临界干燥工艺在硅片上制备了纳米多孔SiO2薄膜。XRD表明薄膜为无定形态;SEM显示薄膜具有多孔网络结构,其SiO2粒子直径为10~20nm。利用FTIR研究了薄膜的结构,纳米多孔SiO2薄膜含有Si—O—Si与Si—OR结构,呈疏水性;该SiO2薄膜热处理后因含有Si—OH基团而呈吸水性;用三甲基氯硅烷对热处理SiO2薄膜进行修饰可使其呈疏水性,修饰后的薄膜在N2中温度不高于450℃可保持其疏水性与多孔结构。     

碳氮薄膜的制备及其拉曼光谱研究

使用自行设计的真空系统 ,采用弧光放电等离子体的方法 ,成功制备了表面光滑致密的碳氮薄膜 .牛顿环干涉图样进一步验证了薄膜厚度的均匀性 .拉曼光谱显示了 3个主要的散射峰和几个相对较弱的峰 ,拉曼光谱分析表明 ,膜的结构是一种无定形非晶碳氮膜 ,碳原子与氮原子在薄膜中以各种不同的键态存在 .通过比较样品不同区域的拉曼光谱图发现 ,谱图几乎没有变化 ,说明制备的碳氮薄膜结构是均匀的     

固体表面上硅烷薄膜的红外光谱研究

在固体表面上，硅烷薄膜的红外谱能够用傅里叶红外光谱仪得到。实验结果表明，特征吸收带的频率与基材物质的性质有关。     

纳米Mn2O3的制备及其红外光谱研究

本言语和化学液相均相沉淀法首次制备了纳米Ｍｎ２Ｏ３利用射线衍射，透射电镜和红外光谱分析方法了其微经持征与物理性质的关系，并对结果作了初步的解释。     

BeH2薄膜的制备及红外特性

采用蒸发铍原子与非平衡态氢原子反应制备了透明的BeH2薄膜.扫描电子显微镜(SEM)观察到薄膜表面存在微孔洞,红外光谱显示在722 cm-1有一个强烈的吸收峰.采用密度泛函理论(DFT)对BeH2网状结构进行了计算,得到的3个基本振动模式的频率和强度与文献中BeH2粉末的实验数据基本一致,其中弯曲振动的计算频率为747...     

BeH2薄膜的制备及红外特性

采用蒸发铍原子与非平衡态氢原子反应制备了透明的BeH2薄膜。扫描电子显微镜(SEM)观察到薄膜表面存在微孔洞,红外光谱显示在722 cm-1有一个强烈的吸收峰。采用密度泛函理论(DFT)对BeH2网状结构进行了计算,得到的３个基本振动模式的频率和强度与文献中BeH2粉末的实验数据基本一致,其中弯曲振动的计算频率为747 cm-1,与BeH2薄膜的红外吸收峰一致。推测BeH2薄膜的结构与BeH2粉末有所不同,因而导致某些振动峰被抑制。     

In situ infrared spectroscopic study of cubicboron nitride thin film delamination

This paper investigates the procedure of cubic boron nitride （cBN） thin film delamination by Fourier-transform infrared （IR） spectroscopy. It finds that the apparent IR absorption peak area near 1380cm^-1 and 1073 cm^-1 attributed to the B-N stretching vibration of sp2-bonded BN and the transverse optical phonon of cBN, respectively, increased up to 195% and 175% of the original peak area after film delamination induced compressive stress relaxation. The increase of IR absorption of sp2-bonded BN is found to be non-linear and hysteretic to film delamination, which suggests that the relaxation of the turbostratic BN （tBN） layer from the compressed condition is also hysteretic to film delamination. Moreover, cross-sectional transmission electron microscopic observations revealed that cBN film delamination is possible from near the aBN（amorphous BN）/tBN interface at least for films prepared by plasma-enhanced chemical vapour deposition.     

An infrared spectroscopic study of tert-butyl peroxoesters

The infrared spectra of peroxoesters based on tert-butyl hydroperoxide and aliphatic acids, tert-butyl peroxobenzoate, and their nonperoxo analogs have been studied. The observed absorption bands have been assigned to the vibrations of individual bonds, the characteristic features of the structure of the peroxoester molecules have been investigated, and the force constants have been calculated. A set of absorption bands suitable for the identification and analysis of tert-butyl peroxoesters based on aliphatic acids has been proposed.     

Chiral organic glass and its infrared spectrum property

Chiral molecules griseofulvin were disseminated homogeneously in poly methyl metahcrylate (PMMA) host, which agglomerate from methyl metahcrylate and N, N-dimethyl formamide dimethyl acetal, using benzoyl peroxide as a catalyst. So the chiral organic glass has been manufactured successfully. Its optical rotatory were investigated from a solution state to a solid state. The results of measurement show that the chiral parameter of the chiral organic glass is 2.65×10^{-7} and its specific rotation has increased compared with its solution condition. Its infrared spectra property has been measured by Fourier transformation infrared spectrometer. The results show that the chiral molecules fill in the pore of the network structure in the organic glass, which hardly link with the host.     

Preparation and property of polyvinyl alcohol-based film embedded with gold nanoparticles

Gold nanoparticles were prepared by a simple heat-treated method using polyvinyl alcohol (PVA) as reducing and stabilizing agent in this article. UV/Vis spectroscopy was used to monitor the preparation. The formation of a sharp band at ~530 nm in the UV/Vis spectra and morphological characters revealed by transmission electron microscopy indicated the generation of Au nanoparticles. The PVA film embedded with Au nanoparticles was prepared by flow casting method and characterized by thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction, Fourier transform infrared spectra, and X-ray photoelectron spectroscopy. The results showed that Au nanoparticles embedded in PVA film can improve the thermal stability of the film under investigation, leading to interesting technological applications.