thermoresponsive and shape memory polymers for leather 4th sem 1st review

8/12/2019 Thermoresponsive and Shape Memory Polymers for Leather 4th Sem 1st Review

1/19

Thermoresponsive and ImpactResistant Polymers for Leather

A Jaya Prakash


2/19

Objective

Preparation of Thermoresponsive synthetic

tanning agent

Preparation of impact resistant polymers

Possible leather applications


3/19

Need for the study

Synthetic tanning agents are used for

achieving filling and grain tightening of leather

Need for development of syntans with

multiple functions

Stimuli responsive materials provide multi

functionality

Stimuli responsive materials find greater

opportunity for development of specialty

leathers


4/19

State of Art

Thermoresponsive Materials:

Sangeetha et al., n-octadecane as PCM.Melamine-formaldehyde polymer is used to

encapsulate PCM.


5/19

Rajendra S et al., Phenolformaldehyde

microcapsules with linseed oil as an activeagent were produced by applying in situ

polymerization method. The anticorrosion and

selfhealing efficiency of the synthesizedmaterials were studied.


6/19

Yvonne Hertle et al., explained

thermoresponsive behavior of poly (NIPAM-

co-Acrylic acid) different concentrations of

acrylic acid were taken as co-monomer for

preparations and thermoresponsive

characteristics are studied


7/19

Jae-Hwang Lee et al., 1 mm thick self-

assembled polymer film, a 10 wt% toluene

solution of PS-b-PDMS is drop-cast onto a

previously crosslinked PDMS substrate.

PS is a glassy polymer, whereas PDMS is a

rubbery polymer.


8/19

Scope of the work

Thermoresponsive synthetic tanning agents

can be used for making leathers which can be

capable of responding to external stimuli

Shape memory polymers can be used for

making of leathers with good impact

resistance


9/19


10/19

Work Done

N-Octadecane encapsulated Phenol-

Formaldehyde syntan

Acrylic syntan (NIPAM-co-MMA-co-MA )

Characterization studies:

SEM

FTIR

NMR


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15/19

Impact Resistant Materials

Amides : Kevlar is a para-aramid synthetic

fiber (poly paraphenylene terephthalamide)


16/19

Non-Newtonian fluids

In a non-Newtonian fluid, the relation

between the shear stress and the shear rate

is different and can even be time-dependent.

Therefore, a constant coefficient of viscosity

cannot be defined.

E.g. Oobleck, Sand in water


17/19


18/19

Focus for Review 2

Para amide synthesis and analysis

Non- Newtonian material synthesis

PEG with Silica powder coatings

Application on leather

Evaluation and testing


19/19

Thank You

thermoresponsive and shape memory polymers for leather 4th sem 1st review

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