Polyethyleneimine‐modified porous aromatic framework and silane coupling agent grafted graphene oxide composite materials for determination of phenolic acids in Chinese Wolfberry drink by HPLC

2020 ◽  
Vol 43 (4) ◽  
pp. 774-781 ◽  
Author(s):  
Yaying Lv ◽  
Tao Zhu
Keyword(s):  
Graphene Oxide ◽  
Composite Materials ◽  
Phenolic Acids ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Oxide Composite ◽  
Porous Aromatic Framework ◽  
Silane Coupling

Silane coupling agent grafted graphene oxide and its modification on polybenzoxazine resin

2016 ◽  
Vol 24 (7) ◽  
pp. 635-648 ◽  
Author(s):  
Peijun Xu ◽  
Xiaotian Yan ◽  
Peiliang Cong ◽  
Xingtian Zhu ◽  
Danggang Li
Keyword(s):  
Graphene Oxide ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Silane Coupling

Controllable synthesis and enhanced microwave absorption properties of silane-modified Ni0.4Zn0.4Co0.2Fe2O4 nanocomposites covered with reduced graphene oxide

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 93739-93748 ◽  
Author(s):  
Peijiang Liu ◽  
Zhengjun Yao ◽  
Jintang Zhou
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Adsorption Properties ◽  
Controllable Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Reduced Graphene ◽  
Silane Coupling

Silane coupling agent modified Ni0.4Zn0.4Co0.2Fe2O4 ferrite decorated reduced graphene oxide nanocomposites were firstly synthesized, and their extraordinary microwave adsorption properties were investigated.

Study on UV-protection and hydrophobic properties of cotton fabric functionalized by graphene oxide and silane coupling agent

2019 ◽  
Vol 48 (3) ◽  
pp. 237-242 ◽  
Author(s):  
Feilong Shi ◽  
Jia Xu ◽  
Zhanzhu Zhang
Keyword(s):  
Contact Angle ◽  
Graphene Oxide ◽  
Cotton Fabric ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Uv Protection ◽  
Curing Temperature ◽  
Hydrophobic Properties ◽  
Content Type ◽  
Silane Coupling

Purpose This study aims to prepare UV protection and hydrophobic fabric through modifying cotton fabric by graphene oxide and silane coupling agent. The graphene oxide and silane coupling agent (KH570) are anchored on the cotton fabric by a stable chemical bond. Design/methodology/approach Graphene oxide was prepared by modified Hummers method. The fabric sample was treated with graphene oxide and silane coupling agent KH570 using simple dipping-padding-drying method. The effects of the dosage of graphene oxide, silane coupling agent KH570 and curing temperature were determined by single variable experiment and orthogonal experiment, The UVA and UVB transmittances in ultraviolet light of the sample fabric were characterized, and the contact angle test method with water was used to indicate the hydrophobicity of the sample fabric. The structure and surface of the fabric were analyzed using Fourier-transform infrared spectroscopy and scanning electron microscopy. Findings The cotton fabric was successfully modified by graphene oxide and silane coupling agent KH570. Compared with the untreated fabric, the surface of the fabric was smooth, and there was no gap on the fiber. The graphene oxide, silane coupling agent KH570 and cotton fabric combined tightly. The UPF value of the modified fabric was 50+, and the contact angle reached 138.1°. It had excellent UV protection and hydrophobic properties. Research limitations/implications Although graphene oxide and silane coupling agents KH570 had successfully endowed the cotton fabric with good UV protection and hydrophobic properties, graphene oxide and silane coupling agent KH570 are expensive and used in large quantities. There are certain limitations in the actual life and production process. Practical implications After treating with silane coupling agent, the hydrophilic fabric treated with graphene oxide is being translated into hydrophobic, and graphene oxide bonded with cotton. The modified fabrics also have excellent UV protection. This fabric can be used for outdoor sports such as clothes and tents. Originality/value Cotton fabric treated with graphene oxide generally by simple dip-dry-cure method is hydrophilic and graphene oxide is easy to drop. The usage of silane coupling agent KH570 as a crosslinking agent to link graphene oxide and cotton fibers has not been reported yet. The modified fabrics have both UV protection and hydrophobic properties.

Preparation and Mechanical Properties of HA/PHB Composites

2010 ◽  
Vol 105-106 ◽  
pp. 104-107 ◽  
Author(s):  
Zhi Qi Zhuo ◽  
Li Min Dong ◽  
Cheng Wang ◽  
Qing Feng Zan ◽  
Jie Mo Tian
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Composite Materials ◽  
Fracture Surface ◽  
Surface Treatment ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Bending Strength ◽  
Silane Coupling ◽  
The Impact

This paper focuses on the influence on the mechanical properties of hydroxyapatite / poly-hydroxybutyrate (HA / PHB) composites by different HA contents, and the effect of Silane coupling agent on improving the interface of HA/PHB composite materials. The HA/PHB composites were prepared by ball milling, hot-pressing, the HA content were 0, 5, 10, 15, 20 and 30wt%, respectively. Silane coupling agent was used for HA surface treatment in HA/PHB composites to compare with not having HA surface treatment in HA/PHB composite materials. The impact strength and flexural strength of HA / PHB composites were tested, and the microstructure of the fracture surface was observed by SEM. The results showed that HA could enhance the bending strength of HA/PHB composites. With HA content increased, the bending strength increased first and then decreased, when the HA content was 10wt%, the maximum bending strength reached 32.74MPa, increased about 41% comparing with pure PHB. Silane coupling agent can improve the interface of HA / PHB, then enhance the mechanical strength. When the HA content was 15wt%, the maximum bending strength reached 46.6MPa, Increased about 56% comparing with the same proportion of untreated HA/PHB composite material, and about double comparing with pure PHB.

Study on Properties of Recycled Fiber from Waste Newspaper / PLA Composites

2011 ◽  
Vol 55-57 ◽  
pp. 392-396
Author(s):  
Hui Li ◽  
Zhuo Tong ◽  
Fang Cheng ◽  
Xin Gong Li
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Water Absorbency ◽  
Molding Process ◽  
Silane Coupling ◽  
Recycled Fiber ◽  
Recycled Fibers

Prepare composite materials with recycled fibers from waste newspaper and PLA by inject-molding process, and study on recycled fiber of the modified-property treatment of silane coupling agent and alkali deinking treatment influence properties of composite materials. It is found out that, recycled fibers under the modified-property treatment of silane coupling agent and under alkali deinking treatment can effectively improve compatibility between recycled fibers and PLA, and improve mechanical properties and water absorbency of composite materials.

Preparation and Characterization of Polypyrrole/Attapulgite with Organic Surface Modification Conducting Composite

2010 ◽  
Vol 160-162 ◽  
pp. 1126-1130
Author(s):  
Hui Xia Feng ◽  
Sheng Li Liu ◽  
Jian Qiang Zhang
Keyword(s):  
Surface Modification ◽  
Composite Materials ◽  
Coupling Agent ◽  
Silane Coupling Agent ◽  
Sulfamic Acid ◽  
Chemical Oxidation ◽  
Characterization Methods ◽  
Chemical Oxidation Polymerization ◽  
Silane Coupling ◽  
Surface Modified

Attapulgite was organic surface modified with silane coupling agent (KH570) and acetone, with ferric chloride (FeCl3∙6H2O) as the oxidant, sulfamic acid(SA) as dopant, prepared polypyrrole/attapulgite with organic surface modification conducting nano-composite materials (PPy/ATTP-KH) by chemical oxidation polymerization, and using IR, XRD and SEM characterization methods to characterize Internal structure of composite materials obtained. The results show that in the condition of n(Py):n(FeCl3∙6H2O):n(SA) =1:1:0.5, and with the increase of contents, composite conductivity increased and then decreased, when the contents of attapulgite is to 50%, the conductivity reaches maximum 30.0 S•cm-1. We can see from the IR spectrum, silane coupling agent and hydroxyl of attapulgite surfaces have a chemical bonding, and plays a good modification to the surfaces of attapulgite, Thereby enhancing the conductivity of the composite materials.

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