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首页> 外文期刊>International Journal of Adhesion & Adhesives >Waterborne polyurethane-silica nanocomposite adhesives based on castor oil-recycled polyols: Effects of (3-aminopropyl)triethoxysilane (APTES) content on properties
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Waterborne polyurethane-silica nanocomposite adhesives based on castor oil-recycled polyols: Effects of (3-aminopropyl)triethoxysilane (APTES) content on properties

机译：基于蓖麻油再循环多元醇的水性聚氨酯 - 二氧化硅纳米复合粘合剂：（3-氨基丙基）三乙氧基硅烷（Aptes）含量对性质的影响

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Waterborne castor oil-recycled polyol based polyurethane-silica nanocomposite adhesives (WPU) with polymer matrix and silica nanoparticles chemically bonded have been successfully prepared through a sol-gel process. A series of waterborne polyurethane adhesives with hard segment contents from 71.3 to 74.5 wt%, were synthesized using an isophorone diisocyanate, 2-bis(hydroxymethyl) propionic acid, recycled castor oil-based as soft segments and (3-aminopropyl)triethoxysilane (APTES) as chain extender. The depolymerized oligoester obtained from glycolysis of poly(ethylene terephthalate) (PET) waste using triethylene glycol (TEG), was transesterified with castor oil (CO) which resulted in the formation of hydroxyl-functional polyester polyol, with hydroxyl value of 414 mgKOH g(-1). The molecular structures and mass of glycolyzed PET oligoesters, castor oil based polyol and castor oil-based polyurethane-silica nanocomposite adhesives were estimated by Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). The structure and properties of the resulting films were investigated by FTIR, wide angle X-ray diffraction measurement (XRD), thermogravimetry (TG) and differential scanning calorimetry (DSC). TG analysis indicated that APTES can improve the thermal stability of WPU. XRD showed that the crystallinity of WPU decreased with the increase alkoxysilane content. The extent of crosslinking was investigated to show a dependence on silica concentration, which increased the glass transition temperature and particle size of polyurethane nanocomposites with increasing alkoxysilane content due to the condensation of the alkoxysilane groups. The hardness, adhesion and gloss quality of the polyurethane films were also determined considering the effect of APTES content, so this paper confirmed the suitability of using these castor oil-based waterborne polyurethane-silica nanocomposites as new adhesive materials with high performance coatings materials. The experimental results reveal that the APTES and the hard segment content play a key role in controlling the structure and properties of the PU cast films based on castor oil-recycled polyols.
机译：通过溶胶 - 凝胶工艺成功地制备了水上蓖麻油基于聚合物基质和硅纳米颗粒的水性蓖麻油基于多元醇基的多元醇基 - 二氧化硅纳米复合粘合剂（WPU）。使用异佛酮二异氰酸酯，2-双（羟甲基）丙酸，再生蓖麻油为基于软链段和（3-氨基丙基）三乙氧基硅烷（Aptes ）作为链扩展器。使用三甘醇（TEG）从聚乙醇分解的糖醇分解的解聚寡核苷酸酯用三甘醇（CO）酯化，导致羟基官能聚酯多元醇的形成，羟值为414mgKOHg （-1）。通过傅里叶变换红外光谱（FTIR）和凝胶渗透色谱（GPC）估计了糖基于PET Oligoesters，蓖麻油基多醇和蓖麻油基的聚氨酯 - 二氧化硅纳米复合粘合剂的分子结构和质量。通过FTIR，广角X射线衍射测量（XRD），热重度（TG）和差示扫描量热法（DSC）研究了所得薄膜的结构和性质。 TG分析表明，APTES可以提高WPU的热稳定性。 XRD显示WPU的结晶度随烷氧基硅烷含量的增加而降低。研究了交联的程度以显示对二氧化硅浓度的依赖性，其增加了聚氨酯纳米复合材料的玻璃化转变温度和粒度随着烷氧基硅烷基团的缩合而增加的烷氧基硅烷含量。考虑到Aptes含量的效果，还确定了聚氨酯膜的硬度，附着力和光泽度质量，因此本文证实了使用这些蓖麻油基水性聚氨酯 - 二氧化硅纳米复合材料的适用性，作为具有高性能涂料材料的新粘合材料。实验结果表明，APT和硬段内容在控制基于蓖麻油再循环多元醇的PU铸膜的结构和性质方面发挥着关键作用。

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