Firdos Jahan

9 Questions 13 Answers 0 Followers

Questions related from Firdos Jahan

Can any one tell me what is the energy band gap value for chitosan-PVA blends?

i am not getting the exact value of energy band gap for chitosan-pva blend thin films..also not getting the papers..plz suggest me...

09 November 2016 2,974 3 View

In my uv graph,absorption value is decreasing with increasing crosslinking ratio comparing to pure blend/why?

for chitosan/pva(50-50) blend i am getting maximum absorption,but as i am increasing the crosslinking ratio the absorption value is decreasing in uv region.i am attaching the graph(black curve is...

05 October 2016 3,129 3 View

Ionically cross linked chitosan/pva blend film is not swelling in distilled water at room temp. Can you suggest me why it happened?

as i cross linked the blend film in ionic salt solution.but when this ionically cross linked film is dipped in distilled water it is dissolving in it completely not swelling..According to...

08 February 2016 2,459 10 View

What is exact tg value of chitosan biopolymer?

as i am doing dsc measurement of ionically crosslinked chitosan blend..i want to know what is its exact tg value?

06 February 2016 2,751 2 View

What happens exactly if tensile strength of crosslinked chitosan blend is decreasing with increase in modulus of elasticity values?

for blend TS is high but while crosslinking it decreases...%elongation is increasing and also elasticity modulus increased.what should i confirmed from this results?

11 January 2016 5,166 2 View

What happens exactly if a biopolymer has increasing melting temperatue and decrease in tensile strength?

as i am preparing ionically crosslinking chitosan blends.the tm is increasing as croslinker is increasing and tensile strength is decreasing with increase in E%.i am not getting the reason through...

31 December 2015 7,623 4 View

Does potassium nitrate partially dissolve in ethanol?

i want potassium nitrate to be get crosslinked to biopolymer..so weather pot.nitrate will be partially dissolve in ethanol or not?if yes den weather crosslinking will be done in partially dissolve...

03 December 2015 2,225 7 View

Is chitosan with DA 88.1% soluble in 0.1M Hydrochloric acid solution?

I want to use hcl instead of acetic acid becouse acetic acid give bad irresistable smell..so is it possible that i can take hcl solution?is 2.5gm of chitosan will disslove in 500ml Hcl solution?

25 August 2015 4,765 3 View

Why am I not achieving a desirable film after crosslinking chitosan film with calcium chloride solution?

I am working on crosslinking polymers. I am unable to remove that crosslinked chitosan film from the polystyrene petriplate - it is breaking. What can I do remove it safely? Please kindly assist.

20 November 2014 1,479 3 View