Correlation of SiO x layer thickness and properties of BOPP/SiO x composite films with spin coating process parameters

Yao, Xiaoli; Ma, Yuhong; Zhao, Changwen; Yang, Wantai

doi:10.1007/s10118-013-1224-9

Cited by 2 publications

(4 citation statements)

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“…Among various metal oxides, a silicon oxide-like (SiO x ) film on a polymer substrate is especially important because this semiconductor material can provide crucial properties in devices or serve as a base layer for further multilayer construction. We found that the C–OH surface could act as a nucleation-and-growth site for a subsequent sol–gel reaction on the surface. , Differing from commonly used sol–gel techniques where bulk sol–gel reactions occur simultaneously, surface hydroxyl-directed sol–gel reactions present the unique character of surface-initiated cascade growth (Figure ). Recently, a similar method has been used for the fabrication of a TiO 2 film on a polymer substrate …”

Section: Applicationsmentioning

confidence: 86%

“…We found that the C−OH surface could act as a nucleation-and-growth site for a subsequent sol− gel reaction on the surface. 18,19 Differing from commonly used sol−gel techniques where bulk sol−gel reactions occur simultaneously, surface hydroxyl-directed sol−gel reactions present the unique character of surface-initiated cascade growth (Figure 10). Recently, a similar method has been used for the fabrication of a TiO 2 film on a polymer substrate.…”

Section: Applicationsmentioning

confidence: 99%

“…On the one hand, the high hydrophilicity on the C–OSO 3 – surface creates a significant wettability contrast with an unexposed hydrophobic plastic background, which offers a useful wettability pattern applicable in wetting/dewetting-, bonding strength- and affinity contrast-based material assembly. On the other hand, the chemical reactivity on C–OH surfaces affords a molecular reaction site on an inert polymer surface for further chemical derivatization and the subsequent chemically reactive material assembly including surface grafting of small molecules, synthetic and natural polymers, metal and inorganic oxides (Figure ). − …”

Section: Introductionmentioning

confidence: 99%

“…This Spotlight primarily discusses the chemical reactivity-induced material synthesis on C–OH surfaces due to its importance for the formation of stable composite material films. The discussions on this topic are mainly based on the systematic explorations on the synthesis of organic, inorganic and metallic functional materials where C–OH surfaces have been used to initiate and control the add-on material nucleation and growth. − It should be noted that similar work has previously been performed on self-assembling monolayers (SAMs)-modified substrates, , specifically on OH-terminated SAMs. − However, one major limitation of SAMs is that it strongly relies on the use of inorganic and metal substrates where hydroxyl and metal coordination sites are abundantly available for the formation of SAMs. Although some innovative work have been developed to prepare (pseudo)SAMs on polymer surface through the use of hydroxyl-enriched polyvinyl alcohol (PVA) substrate, − silica-like buffer layer − or surface-adherent polydopamine films, the construction of SAMs is mainly limited to inorganic and metal materials.…”

Section: Introductionmentioning

confidence: 99%

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Hydroxylation of Organic Polymer Surface: Method and Application

Yang

2014

ACS Appl. Mater. Interfaces

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It may be hardly believable that inert C-H bonds on a polymeric material surface could be quickly and efficiently transformed into C-OH by a simple and mild way. Thanks to the approaches developed recently, it is now possible to transform surface H atoms of a polymeric substrate into monolayer OH groups by a simple/mild photochemical reaction. Herein the method and application of this small-molecular interfacial chemistry is highlighted. The existence of hydroxyl groups on material surfaces not only determines the physical and chemical properties of materials but also provides effective reaction sites for postsynthetic sequential modification to fulfill the requirements of various applications. However, organic synthetic materials based on petroleum, especially polyolefins comprise mainly C and H atoms and thus present serious surface problems due to low surface energy and inertness in reactivity. These limitations make it challenging to perform postsynthetic surface sequential chemical derivatization toward enhanced functionalities and properties and also cause serious interfacial problems when bonding or integrating polymer substrates with natural or inorganic materials. Polymer surface hydroxylation based on direct conversion of C-H bonds on polymer surfaces is thus of significant importance for academic and practical industrial applications. Although highly active research results have reported on small-molecular C-H bond activation in solution (thus homogeneous), most of them, featuring the use of a variety of transition metals as catalysts, present a slow reaction rate, a low atom economy and an obvious environmental pollution. In sharp contrast to these conventional C-H activation strategies, the present Spotlight describes a universal confined photocatalytic oxidation (CPO) system that is able to directly convert polymer surface C-H bonds to C-OSO3(-) and, subsequently, to C-OH through a simple hydrolysis. Generally speaking, these newly implanted hydroxyl groups preserve their own reactivity toward other complementary compounds, thus creating a novel base with distinct surface properties. Thanks to this functionalized platform, a wide range of organic, inorganic and metal materials have been attached to conventional organic polymer substrates through the rational engineering of surface molecular templates from small functional groups to macromolecules. It is expected that the proposed novel CPO method and its versatile usages in advanced material applications will offer new opportunities for a variety of scientific communities, especially for those working on surface/interface modulation.

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Section: Applicationsmentioning

confidence: 86%

Section: Applicationsmentioning

confidence: 99%