Contact angle of modified fibrovascular bundle of salacca (Salacca sumatrana Becc.) frond by NaOH+Na2SO3 combination

Abstract The fibrovascular bundle (FVB) of the salacca frond is one of the potential raw materials in the development of bio-composite technology. The purpose of this study was to investigate the wettability of FVB using the contact angle method after the alkali modification treatment. The method of this research was to use FVB frond of Salacca sumatrana Becc. which was treated with alkaline modification of the combination of NaOH+Na2SO3 at various concentrations. The results showed that the combination of NaOH 1M+Na2SO3 0.4 M had the smallest contact angle, which means that the FVB has a good wettability value compared to the control treatment. Based on the results, it can be concluded that the modification of NaOH+Na2SO3 can increase the wettability of FVB.

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Simultaneous determination of surface energy and roughness of dense membranes by a modified contact angle method

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2018.11.059 ◽

2019 ◽

Vol 562 ◽

pp. 370-376 ◽

Cited By ~ 17

Author(s):

Bingjun Han ◽

Shuai Liang ◽

Bo Wang ◽

Jianzhong Zheng ◽

Xing Xie ◽

...

Keyword(s):

Contact Angle ◽

Surface Energy ◽

Simultaneous Determination ◽

Angle Method

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Surface Free Energy Analysis of Natural and Modified Natural Rubber Latex Films by Contact Angle Method

Langmuir ◽

10.1021/la9816104 ◽

2000 ◽

Vol 16 (3) ◽

pp. 1407-1414 ◽

Cited By ~ 39

Author(s):

C. C. Ho ◽

M. C. Khew

Keyword(s):

Contact Angle ◽

Free Energy ◽

Natural Rubber ◽

Surface Free Energy ◽

Energy Analysis ◽

Natural Rubber Latex ◽

Latex Films ◽

Rubber Latex ◽

Angle Method ◽

Free Energy Analysis

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Synthesis and Characterization of a Lignin-Styrene-Butyl Acrylate Based Composite

Polymers ◽

10.3390/polym11061080 ◽

2019 ◽

Vol 11 (6) ◽

pp. 1080

Author(s):

Daniel López Serna ◽

Perla Elizondo Martínez ◽

Miguel Ángel Reyes González ◽

Antonio Alberto Zaldívar Cadena ◽

Erasto Armando Zaragoza Contreras ◽

...

Keyword(s):

Contact Angle ◽

Butyl Acrylate ◽

Raw Materials ◽

Positive Influence ◽

Polymer Chains ◽

Polymer Materials ◽

Polymerization Process ◽

Oh Groups ◽

Water Measurement

In recent years, the pursuit of new polymer materials based on renewable raw materials has been intensified with the aim of reusing waste materials in sustainable processes. The synthesis of a lignin, styrene, and butyl acrylate based composite was carried out by a mass polymerization process. A series of four composites were prepared by varying the amount of lignin in 5, 10, 15, and 20 wt.% keeping the content of butyl acrylate constant (14 wt.%). FTIR and SEM revealed that the –OH functional groups of lignin reacted with styrene, which was observed by the incorporation of lignin in the copolymer. Additionally, DSC analysis showed that the increment in lignin loading in the composite had a positive influence on thermal stability. Likewise, Shore D hardness assays exhibited an increase from 25 to 69 when 5 and 20 wt.% lignin was used respectively. In this same sense, the contact angle (water) measurement showed that the LEBA15 and LEBA20 composites presented hydrophobic properties (whit contact angle above 90°) despite having the highest amount of lignin, demonstrating that the interaction of the polymer chains with the –OH groups of lignin was the main mechanism in the composites interaction.

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Study on the Durability of Fluorinated Water and Oil Repellent Finishing by Contact Angle Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.482-484.1294 ◽

2012 ◽

Vol 482-484 ◽

pp. 1294-1297

Author(s):

Dian Wei Zhang ◽

Yong Zhu Cui ◽

Yan Ling Sui

Keyword(s):

Contact Angle ◽

Curing Temperature ◽

Cross Linking ◽

Optimum Process ◽

Curing Time ◽

Repellent Property ◽

Finishing Agent ◽

Oil Repellent ◽

Angle Method

In this paper, fluorinated water and oil repellent finishing agent was mixed with auxiliary agents and the durability of fabrics treated with the finishing agent was investigated. The water and oil repellent property was discussed and evaluated by contact angle method. The results showed that under the same conditions, adding 0.4% cross-linking agent could make the contact angle of the treated fabric higher than untreated, and the durable-washing property of the fabric was excellent and the durability of fluorinated water and oil repellent finishing agent got improved greatly. The optimum process was that the dosage of water and oil repellent finishing agent was 50g/L, the dosage of cross-linking agent was 4g/L, curing temperature was 160 °C and curing time was 90s.

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