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Effects of processing parameters on production of graphene by mechanical exfoliation / Muhamad Zarif Anuar

By:

Muhamad Zarif Anuar [author.]

Material type: Text

text
text

Media type:

unmediated
computer

Carrier type:

volume
computer disc

ISBN:

THE0001053(Local)

Subject(s):

Dissertation note: Project Paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang – 2017 Abstract: Graphene, a monolayer form of carbon with two dimensional honeycomb lattices (sp2 Hybridization) has shown excellent mechanical, electrical, thermal and optical properties. It is a promising component for many applications in the fields of electronics, composites, sensors as well as energy storage and conversion devices. These engineering applications require availability of graphene on the mass scale and thus suitable processes are necessary for its production down to few sheets level. In the present work, the objective is to study the effect of processing parameter on preparation of graphene at large scale by liquid phase exfoliation of graphite assisted by ultra sound to promote the intercalation and expansion of graphite by using homogenizer. Water and tea polyphenol was choose and act as a dispersion agent and antioxidant. From the result, it is found that the graphene dispersion concentration is increased when the sonication time and power increased with the highest concentration of 1.0699 mg/ml. But, by controlling the centrifuged speed, the result shows no influenced on dispersion concentration. In Addition, the size of the sheets also become smaller when increasing sonication time and power. However, from the XRD analysis, it can be conclude that the graphite only partially exfoliated with the stack of several or tens of single layer graphite. Therefore, by controlling LPE critical parameter likes sonication power, sonication time and centrifuged speed, graphene can produce at high scale.

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Holdings ( 2 )
Title notes ( 4 )

Holdings
Item type	Current library	Call number	Copy number	Status	Date due	Barcode
Final Year Report	UMPLIB GAMBANG	FKKSA .Z37 2017 r Bc. (Browse shelf(Opens below))	1	Not for loan		0000122268
Final Year Report	UMPLIB GAMBANG	CD 11214 \| FKKSA .Z37 2017 r Bc. (Browse shelf(Opens below))	1	Not for loan		0000122269

Faculty of Chemical & Natural Resources Engineering

Project Paper (Bachelor of Chemical Engineering) -- Universiti Malaysia Pahang – 2017

Includes bibliographical references

Graphene, a monolayer form of carbon with two dimensional honeycomb lattices (sp2 Hybridization) has shown excellent mechanical, electrical, thermal and optical properties. It is a promising component for many applications in the fields of electronics, composites, sensors as well as energy storage and conversion devices. These engineering applications require availability of graphene on the mass scale and thus suitable processes are necessary for its production down to few sheets level. In the present work, the objective is to study the effect of processing parameter on preparation of graphene at large scale by liquid phase exfoliation of graphite assisted by ultra sound to promote the intercalation and expansion of graphite by using homogenizer. Water and tea polyphenol was choose and act as a dispersion agent and antioxidant. From the result, it is found that the graphene dispersion concentration is increased when the sonication time and power increased with the highest concentration of 1.0699 mg/ml. But, by controlling the centrifuged speed, the result shows no influenced on dispersion concentration. In Addition, the size of the sheets also become smaller when increasing sonication time and power. However, from the XRD analysis, it can be conclude that the graphite only partially exfoliated with the stack of several or tens of single layer graphite. Therefore, by controlling LPE critical parameter likes sonication power, sonication time and centrifuged speed, graphene can produce at high scale.