Synthesis of Hydrophobic Silica (SiO2)

[@yoji8130]

amazing how perfectly round the droplet is.. reminds me of our world.

[@WorldofNanotechnology]

Thanks for your word of encouragement.

[@孙徐昊]

Thanks for Sharing! I‘d like to know how should I treat these silica nanoparticles so that they can be spin-coated onto the surface of some hydrophobic optical device layers?

[@WorldofNanotechnology]

Thank you all for reaching 1000 subscribers. You love and support to my channel "World of Nanotechnology" has been overwhelming. Your comments have helped me in improving the contents of this channel. More videos coming soon.

[@bellashegitu747]

World of Nanotechnology can this form of silica be dried transparent ? Can it be used for water glass?

[@gangaankamreddi4558]

Sir, can you tell me the chemical composition of final output of hydrophobic silica

[@purchase-qh8iz]

Very Good Video, Let me know if any one in India is manufacturing this product commercially in India.

[@Санчес-я1т]

How to dissolve silica (silicon dioxide) and add to hydroponics solution?

[@WorldofNanotechnology]

silica will not dissolve in water, it will form a gel like solution

[@Санчес-я1т]

@@WorldofNanotechnology And how then to add silica to the hydroponics solution?

[@WorldofNanotechnology]

@@Санчес-я1т You can purchase colloidal silica and add it to hydroponics by diluting it. Roughly prediluting the silica in 5 - 8 litres (1 - 2 US gallons) of water and pH adjusting the solution (water + silica) to 5.5 - 5.8 before adding it to the nutrient tank/reservoir.

[@Санчес-я1т]

@@WorldofNanotechnology Thank you very much!

[@shashankphansikar7094]

What is the quantity of solutions required for 15 gm hydrophibic silica

[@solomontilahun3395]

How we make sio2 negatively charged?

[@rafaatlamee9124]

Can you help me in synthesizing silica atoms for crystal cat and dog litter?

[@informative3607]

Sir what combination i should use on my car for ceramic coating

[@talhatariq9098]

how to make water repellent solution for car paint which chemical use

[@businessconsultant441]

Sir what is Chemical Name of Poly Silica Resin? how is this Combination for Ceramic Coating Poly Silica Resin Dissolve in Xylene Solvent Please Reply

[@poojamaurya3525]

And if I want to make silica sol by using this recipe, then will it be stable for a month?

[@eshaannayak5454]

sir is there a way to dissolve this hydrophobic silica further into a common polymer solution and then coat it on a substrate?

[@WorldofNanotechnology]

You can try some non-polar solved. It won't dissolve but get suspended like colloidal solution.

[@vahidshafiee9952]

hi and thanks for this education. does this silica use in customic products likes toothpaste or it is harmfull?

[@WorldofNanotechnology]

Silica is not harmful in gel form or aqueous solution. However small silica particles in air can cause silicosis if inhaled regularly. Workers in silicate mines get affected due to silicosis.

[@SandeepKumar-jj7zi]

What is the reason for the hydrophobicity of these nano sized silica particles ?

[@WorldofNanotechnology]

Nanotexturing of the surface and non-polar group like methyl on the surface.

[@rabahazzoug832]

What's the appropriate inorganic solvent for this silica?

[@AS-ug2vq]

Can you make colloidal silica?

[@WorldofNanotechnology]

No I have not made colloidal silica, I can try that in future. Thanks for the suggestion.

[@MilanPatel-mo8dx]

@@WorldofNanotechnology can you make colloidal silica now

[@WorldofNanotechnology]

@@MilanPatel-mo8dx Ok, I will make a new video for colloidal silica

[@finalt2004]

Did it transparent when finish sol-gel process?

[@WorldofNanotechnology]

It will depend, if you allow complete hydrolysis it will turn into white powder, but if you keep the concentration of MTMS low then it will be clear and transparent.

[@veluvelu2457]

Sir, Please can you make a video about How to make DIY SuperHydrophobic Silica Spray Non-Toxic Synthesis 2019. Please Sir

[@WorldofNanotechnology]

Thanks for your feedback, I have made the video, I will upload tomorrow

[@veluvelu2457]

@@WorldofNanotechnology Okay, Sir. Thank you I Share Ur videos and more. I'm waiting for your video tomorrow. Thank for replying.

[@ronaldoapolinario6118]

Hello sir! Is it possible for me to use acetic acid instead of nitric acid in making hydrophobic silica? Thank you!

[@WorldofNanotechnology]

Yes, acetic acid will also work. Dilute NaOH will also work. This hydrolysis can be catalyzed either by base or acid.

[@algozali3553]

Hellow...is the liquid the same as polysilazane?

[@WorldofNanotechnology]

No, it is methyl trimethoxy silane. I think you are talking about polydimethyl siloxane, popularly known as PDMS. You can use that as well.

[@algozali3553]

@@WorldofNanotechnology okey,tank you

[@jassi2762]

Whats the water contact angle

[@WorldofNanotechnology]

151 degree

[@gladysshopia50]

Sir can i change trimetilsiloxane silane with metil methacrylat thank's

[@opulodogatomarketing3047]

Its possible to mix this silica to waterproof concrete?

[@WorldofNanotechnology]

Yes, it is possible. But it should be applied as coating on a smooth surface. Mixing in the concrete will not help.

[@dr.nadermostafa8193]

do u know the chemical additivies used to make it moisture resistance or water resistance ?

[@opulodogatomarketing3047]

@@dr.nadermostafa8193 yes

[@poojamaurya3525]

Hello Sir, can you please tell me the recipe of this sol - gel synthesis?

[@advancedauto7667]

How do you make an ethanol si02 based dispersion for to use on automotive paint as a protection

[@AdvancedNanotechLabProducts]

Use HydraX ceramic for it

[@chiragpatel8802]

Sir, Hydrophilic silica liquid form me purchase karna ho to kya name se milega

[@WorldofNanotechnology]

There are many silres products, sold by wacker chemicals. You go through the catalogue and select the desired hydrophobic product. You can dilute the chemical with appropriate solvent and use.

[@syazwanroslee657]

How long does it take to stir

[@WorldofNanotechnology]

About 30-60 minutes

[@syazwanroslee657]

@@WorldofNanotechnology I see..can I know how you structured the particle onto the glass substrate? How many times do you pour or are you using asome kind of method?

[@WorldofNanotechnology]

@@syazwanroslee657 you just put few drops of the colloidal suspension and spread uniformly on the glass and let it dry. Your glass will become hydrophobic.

[@vishalthakar8272]

Hello sir by this process is it possible to make clear & optically transparent solution? I try to do this but can't getting success final solution is not completely clear & transparent it's remain turbid. .. in experiment verious quantity I checked for Ex.. 1) Ethenol 20ml + Di water 70ml + 1ml NH4OH (25%) mix & stirring.. after 30 min,2.5ml TEOS add drop by drop. .. 2) second method. . % of total volume. . DI water 10%, Ethenol 70%, NH4OH 10% stirring 30 min after add TEOS 10% keep sterling for next 4 hours. ... 3) third method. . % of total volume. . DI water 46.15%, Ethenol 46.15%, HMDS 0.62% , HMDA 0.72% stirring for 4 hours then add surfactant (SDBS) 1.85% & again stirring for 2 hour. . But I can't able to get total clear & transparent final solution. . Can you suggest how to get ?

[@WorldofNanotechnology]

Yes it is possible to make transparent solution, you can do slow hydrolysis of methyl trimethoxy silane with using oxalic acid . Don't allow the ppt to form, you can use the clear solution for coating.

[@Addybhoot93]

Can I use 2-propanol instead of ethanol in this process?

[@WorldofNanotechnology]

@@Addybhoot93 yes you can use 2-propanol

[@fashionandblog]

How, we made transparent solution of hydrophobic silica solution. Give me methods of this preparation. By mail [e-mail]

[@刘方彤]

I was wondering if this is the colloids that make silane? Can't you add a lot of water in the hydrolysis process, or you won't be able to form a gel?

[@WorldofNanotechnology]

The precursor is itself silane. The purpose is to make hydrophobic silica. If you add lot of water there will be immediate precipitation and you dont get the desired hydrophobicity.

[@lindlyshanepoblete63]

is there any alternative for methyl trimethoxy silane? since it's not accesible here in my country (Philippines) thank you so much

[@WorldofNanotechnology]

You can use polydimethylsiloxane (PDMS), however the procedure will be slightly different. You can also use long chain fatty acids. Please search literature, there are hundreds of other precursor which can be used.

[@lindlyshanepoblete63]

World of Nanotechnology thank you, can we use this for papers?

[@WorldofNanotechnology]

@@lindlyshanepoblete63 yes you can coat a paper with the spray as shown in my other video with vacuum grease and paint thinner

[@lindlyshanepoblete63]

World of Nanotechnology Thank you for your help sir

[@marcelon26]

Is it possible to use 3-aminopropyltryethoxysilane in place of MTMS, using the same reaction mechanism?

[@WorldofNanotechnology]

Yes you can use APTES instead of MTMS, but you should use ammonium hydroxide for hydrolysis, also APTES is not hydrophobic due to NH2 group present as it is polar.

[@marcelon26]

@@WorldofNanotechnology Thank you very much. A doubt: for the reaction with MTMS, is it better acid (HNO3) or alkaline (NH4OH)? What is the proportion and concentration of these catalysts?

[@sharmaranjit1]

@@marcelon26 It is better with NH4OH, for the video I used HNO3 as it gives the precipitate quickly. You should take 2 times NH4OH as the number of moles of MTMS

[@marcelon26]

@@sharmaranjit1 OK Mr. Ranjit. And how long do you advise maintaining the reaction to form the product? Would that be at room temperature all the time? Do you have any literature on this reaction to provide, which talks about ceramic coating?

[@benz6878]

@@marcelon26 Save when use to be product beter use alkaline,

[@chie_mms]

Hello good day. Thank you so much for this. I was wondering if there is a journal article or paper that this method was cited? If there is, can you send me the link? It will be very useful for my thesis.

[@reesebenedict6648]

i realize Im pretty off topic but do anybody know of a good place to watch newly released tv shows online?

[@lorenzoanthony6807]

@Reese Benedict Flixportal :P

[@reesebenedict6648]

@Lorenzo Anthony Thank you, I signed up and it seems to work :) Appreciate it !

[@lorenzoanthony6807]

@Reese Benedict You are welcome :)

[@dawwnbrk3r653]

hello, did you ever figure this out? I'm not able to find related literature either.

[@marcelon26]

Did you catalyze with Ammonium Hydroxide or Nitric Acid? In the questions you mention Ammonia, but in the description this HNO3.

[@WorldofNanotechnology]

This reaction can be catalysed by either NH4OH or dil. acid like HNO3. Most papers you will find with NH4OH. In the video I wanted to show it is also possible with HNO3

[@marcelon26]

@@WorldofNanotechnology You get to make available or quote literature that talks about the subject and more details about the proportion and the exact method of obtaining it. What is the amount of Nitric Acid used, and what is the concentration of the solution?

[@WorldofNanotechnology]

@@marcelon26 Thanks for the wonderful suggestion. I will provide the literature also

[@marcelon26]

@@WorldofNanotechnology Thanks. You can send me in my email box: [e-mail] Thanks very much for attention

[@ankitpatel2433]

How to make hydrophobic silica solution?

[@ankitpatel2433]

[e-mail] Replay fast

[@WorldofNanotechnology]

@@ankitpatel2433 You take this hydrophobic silica in small quantity and add appropriate solvent to make a dilute colloidal suspension. Search literature for exact ratio.

[@javiercastillo777]

Hello , How can I get SiO2 NP in solution to apply to my tennis or windshield?

[@WorldofNanotechnology]

You need to buy hydrophobic spray, available on amazon. First spray on a test surface. Then apply on the desired area.

[@javiercastillo777]

@@WorldofNanotechnology thanks, but , I want to make this spray , it's for that my question

[@WorldofNanotechnology]

@@javiercastillo777 I don't know the ingredients for commercial spray, but you can search for research paper. I think you need to make fluoroalkylsilane solution in some organic solvent like ethanol and try.

[@javiercastillo777]

@@WorldofNanotechnology thank you, I Will do it

[@musarratmustafa7690]

What is a ethylene v/a copolymer?

[@WorldofNanotechnology]

Ethylene is a monomer for synthesis of polyethylene. If you mix another monomer during synthesis then your product will be a copolymer.

[@pierreledoux3331]

Is this similar to the hydrophobic silica sold on www.nanocym.com? Is it monodisperse?

[@WorldofNanotechnology]

I don't know what is their composition, in this method you get a silica with high contact angle

[@onuraltayakdas2786]

Should I add deionized water first and mix it with ethanol? I saw in some articles they added deionized water. I am confused, please help

[@WorldofNanotechnology]

First add ethanol then deionized water

[@onuraltayakdas2786]

World of Nanotechnology thanks. I did not see that you added deionized water in video. Can i do this process without adding deionized water?

[@WorldofNanotechnology]

@@onuraltayakdas2786 yes only ethanol will also work

[@محمدرفیعی-ث7ع]

may i know how much sio2

[@networktalha]

Is there anyone who can send an article for my proejcet

[@WorldofNanotechnology]

Which project, you can search articles in Google

[@networktalha]

@@WorldofNanotechnology For my chemist project. I will use ready silica on piece of fabric but which methot should ı use to make this

[@sreejupv4164]

Is it biodegradable

[@WorldofNanotechnology]

No it is not biodegradable

[@sreejupv4164]

@@WorldofNanotechnology Hi sir, please give me your contact number or email address

[@WorldofNanotechnology]

Please check this paper, this will help you. pubs.rsc.org/en/content/articlelanding/2019/ta/c8ta10869b#!divAbstract

[@WorldofNanotechnology]

@@sreejupv4164 Did you get my email address, I have posted it at the top of messages. as soon as I am posting it here, it is getting deleted automatically

[@sreejupv4164]

@@WorldofNanotechnology Thank you so much for your reply, but its automatically deleted l. If you don't mind please update your email address in your KZbin channel "About" section

[@williamsuryawinata9427]

What's the Ingredients sir?

[@WorldofNanotechnology]

Ingredients are given in experiment description

[@williamsuryawinata9427]

@@WorldofNanotechnology okay thankyou sir

[@WorldofNanotechnology]

Thank you all for crossing 10000 views

[@monikamadhavan1728]

Great sir, how to make it transparent

[@WorldofNanotechnology]

@@monikamadhavan1728 you have to keep it in colloidal form, don't let it precipitate out. Apply the clear solution on the surface and then wipe off the excess

[@lakshmimohan4590]

Can you tell me how to make a biodegradable hydrophobic material. Please give me reply

[@WorldofNanotechnology]

Please see this paper, I think this will help you. pubs.rsc.org/en/content/articlelanding/2019/ta/c8ta10869b#!divAbstract

[@UditVishal]

Hello, how can we make hydrophobic liquid coating for glass/windshield?

[@WorldofNanotechnology]

You can buy it from amazon. You can also make it by choosing hydrophobic polymer and mixing it in an appropriate solvent. You will have to search literature for that. I have not made any liquid coating.

[@-_o_o_-]

Давай титры нифига не понятно.

[@WorldofNanotechnology]

Please write in English

[@arunmanocha8038]

I am buying automobile ceramic coating

[@rafaatlamee9124]

Can you help me in synthesizing silica atoms for crystal cat and dog litter?

[@WorldofNanotechnology]

Those type of silica is commercially available. Why you want to synthesize. I think zeolites are better suited for cat litters.

[@rafaatlamee9124]

@@WorldofNanotechnologyThank you very much for the reply, sir. I needed from you the ingredients of sand or crystal cat litter. Can you make a video of the materials used in the laboratory? It is necessary. Thank you, my friend. I am waiting for your reply

[@rafaatlamee9124]

Can you help me in synthesizing silica atoms for crystal cat and dog litter?