Cellulose ethers yog cov polymers uas siv tau ntau yam thiab siv tau ntau yam nrog rau kev siv hauv ntau yam lag luam, suav nrog kev tsim cov honeycomb ceramics thiab lwm yam khoom.
1. Kev Taw Qhia Txog cellulose ether:
Cov cellulose ethers yog cov khoom tsim los ntawm cellulose, ib qho polymer ntuj uas pom muaj nyob rau hauv cov phab ntsa cell ntawm cov nroj tsuag. Nws tau los ntawm kev hloov kho tshuaj ntawm cellulose, ua rau cov polymers uas yaj tau hauv dej lossis cov polymers uas yaj tau hauv dej. Cov chaw tsim cellulose feem ntau suav nrog cov ntoo pulp, paj rwb, thiab lwm yam khoom siv ntawm cov nroj tsuag.
2. Hom cellulose ethers:
Muaj ntau hom cellulose ethers, txhua tus muaj cov yam ntxwv tshwj xeeb uas haum rau cov kev siv tshwj xeeb. Qee hom uas siv ntau suav nrog methylcellulose (MC), ethylcellulose (EC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), thiab carboxymethylcellulose (CMC). Kev xaiv cellulose ether nyob ntawm cov yam ntxwv xav tau ntawm cov khoom kawg.
3. Cov txheej txheem tsim khoom:
Kev tsim cov cellulose ethers muaj ntau kauj ruam, suav nrog kev rho tawm cellulose, kev hloov kho tshuaj, thiab kev ntxuav. Cellulose yog thawj zaug rho tawm los ntawm cov nroj tsuag thiab tom qab ntawd cov tshuaj tiv thaiv raug siv los qhia cov pab pawg ua haujlwm xws li methyl, ethyl, hydroxyethyl lossis carboxymethyl. Cov cellulose ether uas tshwm sim tom qab ntawd raug ntxuav kom tshem tawm cov khoom tsis huv thiab ua tiav qhov zoo xav tau.
4. Cov khoom ntawm cellulose ether:
Cov cellulose ethers muaj ntau yam khoom zoo, ua rau lawv haum rau ntau yam kev siv. Cov khoom no suav nrog kev yaj dej, muaj peev xwm tsim zaj duab xis, muaj peev xwm tuab, thiab ruaj khov dhau qhov kub thiab pH ntau. Cov khoom no pab txhawb rau kev hloov pauv ntawm cellulose ethers hauv ntau yam lag luam.
5. Daim ntawv thov ntawm cellulose ether:
Cellulose ethers siv rau hauv ntau yam lag luam, suav nrog tshuaj, khoom noj, kev tsim kho, textiles thiab ceramics. Nws daim ntawv thov ntau yam los ntawm kev siv ua tus neeg sawv cev thickening hauv cov khoom noj mus rau kev txhim kho cov khoom ntawm cov ntaub ntawv tsim kho. Hauv thaj chaw ntawm ceramics, cellulose ethers ua lub luag haujlwm tseem ceeb hauv kev tsim cov honeycomb ceramics.
6. Cellulose ether hauv honeycomb ceramics:
Cov khoom siv ua los ntawm honeycomb yog cov khoom siv uas muaj cov cell teeb tsa ua tus qauv hexagonal lossis honeycomb. Cov khoom siv no paub txog lawv thaj chaw siab, kev nthuav dav thermal qis, thiab cov khoom siv cua sov thiab hloov pauv loj heev. Cellulose ethers yog siv rau hauv kev tsim cov khoom siv honeycomb rau cov laj thawj hauv qab no:
Cov Khoom Siv Binder thiab Rheology Modifiers: Cellulose ethers ua haujlwm ua cov khoom siv binders, tuav cov khoom ceramic ua ke thaum lub sijhawm molding. Tsis tas li ntawd, nws ua haujlwm ua cov khoom siv rheology modifier, cuam tshuam rau kev ntws thiab kev hloov pauv ntawm cov ceramic slurries.
Kev tsim lub cev ntsuab: Cov khoom siv ua los ntawm cov av nplaum uas muaj cov cellulose ethers yog siv los tsim cov lub cev ntsuab rau cov khoom ua los ntawm cov av nplaum honeycomb. Cov lub cev ntsuab yog cov qauv av nplaum uas tsis tau hlawv uas tau puab thiab ziab ua ntej ua tiav ntxiv.
Kev sib sau ua ke thiab ziab: Cellulose ethers pab cov khoom siv ceramic sib sau ua ke thaum lub sijhawm ziab. Nws tiv thaiv kev tawg thiab kev hloov pauv, ua kom lub cev ntsuab khaws nws cov qauv zoo.
Kev Hlawv thiab sintering: Hauv cov theem tom ntej ntawm kev tsim cov khoom siv ua los ntawm honeycomb, cov cellulose ethers hlawv tawm, tawm hauv cov voids uas pab tsim cov qauv honeycomb. Cov txheej txheem sintering ces txuas ntxiv mus kom tau txais cov khoom siv ceramic kawg.
7. Lwm yam kev siv ntawm cellulose ethers:
Ntxiv rau cov honeycomb ceramics, cellulose ethers siv rau hauv ntau yam khoom thiab kev lag luam:
Tshuaj: Siv ua ib qho binder thiab disintegrant hauv cov tshuaj ntsiav.
Kev lag luam zaub mov: Cellulose ethers yog siv los ua cov khoom tuab, cov stabilizers thiab emulsifiers hauv zaub mov.
Cov Khoom Siv Tsim Kho: Nws txhim kho cov yam ntxwv ntawm cov mortars, cov nplaum thiab cov txheej txheem.
Cov ntaub: Cellulose ethers yog siv rau hauv kev luam ntawv thiab kev ntsuas qhov loj ntawm cov ntaub.
8. Tej Yam Uas Yuav Tsum Tau Ua thiab Tej Yam Uas Yuav Tsum Tau Xav Txog:
Txawm hais tias cellulose ethers muaj ntau yam zoo, lawv siv kuj muaj qee qhov kev cov nyom. Cov no yuav suav nrog cov teeb meem ib puag ncig uas cuam tshuam nrog cov txheej txheem tsim khoom thiab qhov xav tau los nrhiav cov khoom siv raw kom ruaj khov. Kev tshawb fawb thiab kev txhim kho tseem tab tom ua kom daws tau cov teeb meem no thiab txhim kho kev ruaj khov ntawm cov khoom cellulose ether.
9. Cov qauv thiab kev txhim kho yav tom ntej:
Thaum thev naus laus zis nce qib thiab kev ruaj khov ua rau muaj teeb meem tseem ceeb dua, yav tom ntej ntawm cellulose ethers yuav muaj kev tsim kho tshiab hauv cov txheej txheem tsim khoom, kev siv cov khoom siv raw bio-based ntau ntxiv, thiab kev tsim cov ntawv thov tshiab. Qhov ua tau ntau yam ntawm cellulose ethers ua rau nws yog cov khoom siv cog lus rau ntau yam lag luam, thiab kev tshawb fawb txuas ntxiv mus yuav qhia txog cov cib fim tshiab.
10. Xaus Lus:
Cellulose ethers yog cov polymers uas muaj ntau yam kev siv hauv ntau yam lag luam. Nws siv rau hauv cov khoom siv cellular ceramics qhia txog nws qhov tseem ceeb hauv kev tsim cov ntaub ntawv siab heev nrog cov khoom tshwj xeeb. Raws li kev lag luam txuas ntxiv nrhiav cov ntaub ntawv ruaj khov thiab ua haujlwm tau zoo, cellulose ethers yuav tsum ua lub luag haujlwm tseem ceeb hauv kev ua kom tau raws li cov kev xav tau no. Kev tshawb fawb thiab kev txhim kho tas mus li yuav nthuav dav ntxiv cov ntawv thov ntawm cov khoom cellulose ether thiab txhim kho lawv txoj kev ruaj khov tag nrho.
Lub sijhawm tshaj tawm: Lub Ib Hlis-23-2024