Kev rov hais txog lub peev xwm ntawm cov khoom siv tau (feem ntau hauv cov hmoov lossis daim ntawv yooj yim) kom yooj yim dispersed hauv nruab nrab hauv nruab nrab thiab ua qhov chaw nyob tsis sib xws los yog dispersion. Cov cuab yeej no yog ib qho tseem ceeb hauv kev lag luam xws li cov tshuaj, kev tsim kho, kev ua liaj ua teb lossis kev ua liaj ua teb kom muaj cov kua los tsim cov homogeneous, raug tshem tawm lossis emulsions. Redispersible hmoov (RDPs) tau siv nyob rau hauv ntau daim ntawv thov los ntawm cov ntaub ntawv tsim kho, muab cov txiaj ntsig zoo xws li txhim kho kev tuav, kev khaws khoom thiab noj tshuaj raug.
1. Taw qhia rau Recispersibility:
Recispersibility yog qhov tseem ceeb ntawm cov khoom siv, tshwj xeeb yog cov pob zeb lossis cov granules, uas txiav txim siab imperse unfiformly nyob rau hauv ib qho nruab nrab hauv nruab nrab tom qab rov kho dua. Lo lus yog feem ntau siv nyob rau hauv kev lag luam uas ua kom muaj kev tawg ntawm cov ntaub ntawv hauv cov kua ua kua yog qhov tseem ceeb rau cov khoom lag luam thiab ua haujlwm. Cov xeeb ceem los ntawm lawv lub peev xwm los ua kom tiav kev kawm tawm lossis kev faib tawm thaum muaj ntau cov ntawv thov, suav nrog cov tshuaj, suav nrog cov tshuaj pab tshuaj, suav nrog cov tshuaj pab tshuaj, suav thiab agnemicals.
2. Qhov tseem ceeb ntawm kev rov ua haujlwm:
Qhov tseem ceeb ntawm Redispersibility stems los ntawm nws cov kev cuam tshuam rau cov khoom lag luam, tuav thiab cia. Nyob thoob plaws kev lag luam, muaj peev xwm hloov cov ntaub ntawv cov khoom siv ua kua ua kom yooj yim ua rau cov khoom siv kho kom yooj yim, txhim kho kev ruaj ntseg thiab kev ua tau zoo dua. Cov kev lag luam tseem ceeb tau txais cov hmoov zoo li muaj xws li:
A. Yeeb tshuaj:
Hauv kev npaj tshuaj, cov hmoov zoo tuaj yeem npaj cov hmoov, cov txiaj ntsig ntawm kev txhim kho Bioavailability, tswj kev tso tawm thiab tus neeg mob yooj yim.
b. Tsim:
Hauv kev tsim kho kev tsim kho, powispersible powders yog siv hauv cov npum qhuav los txhim kho adhesion, yooj thiab dej tsis kam. Cov hmoov no pab txhim kho kev ua haujlwm thiab kev ua tau zoo ntawm cov khoom siv xis, pab ua kom tsim cov khoom lag luam ruaj khov thiab zoo.
Ceramics:
Nyob rau hauv cov nplais nplaum thiab grouts, pilispersible hmoov yog siv los ua cov tshuaj ntxiv los txhim kho Beltive Buttive thiab tawg tsis kam. Lawv ua ib lub luag haujlwm tseem ceeb hauv kev txhim kho lub cev rheological thiab adhesive cov khoom ntawm ceramic formulations.
d. Tshuaj lom neeg ua liaj ua teb:
Cov hmoov nplej liab tuaj yeem siv nyob rau hauv istisemical formulation xws li cov khoom cog qoob loo tiv thaiv, noob pleev xim thiab chiv quav. Cov hmoov no pab tau cov khoom xyaw nquag nquag ua kom cov khoom muaj txiaj ntsig, txhim kho cov txiaj ntsig thiab kev ua haujlwm ntawm kev ua liaj ua teb.
3. Cov yam cuam tshuam rau kev rov ua dua:
Ntau yam cuam tshuam nrog recispersibility ntawm cov khoom siv, suav nrog cov khoom ntawm cov hmoov, cov yam ntxwv ntawm cov kua nruab nrab, thiab kev sib cuam tshuam ntawm cov hmoov thiab kua. Qhov tseem ceeb cuam tshuam rau kev rov ua dua tshiab suav nrog:
A. Particle loj thiab morphology:
Lub particle loj thiab morphology ntawm cov hmoov muaj zog cuam tshuam ntau yam cuam tshuam rau lawv cov kev rov qab. Kev me me qhov loj me thiab cov kheej kheej morphology feem ntau txhawb nqa zoo dua dispersion thiab recispersibility vim nce thaj chaw thaj chaw thiab txo qis rau agglomerate.
b. Nto Chemistry:
Cov txheej txheem saum npoo ntawm cov khoom siv ua haujlwm, suav nrog cov pab pawg ua haujlwm, them nqi hauv hydrophobic, cuam tshuam lawv cov kev cuam tshuam nrog cov kua tawm. Cov txheej txheem hloov kho deg xws li grafting, txheej, lossis derivatization tuaj yeem siv los kho cov khoom muaj saum npoo thiab txhim kho kev rov qab los.
C. Khoom-Ua Kua Ua Si:
Qhov kev sib cuam tshuam ntawm cov khoom me me thiab ua kua nruab nrab ua haujlwm me me hauv lub luag haujlwm hauv kev rov qab los. Yam xws li ntub dej, adsorption, kev xaus thiab hydration kinetics cuam tshuam rau cov dispersion tus cwj pwm thiab kev ruaj khov ntawm qhov kev ncua kev raug ncua lossis kev tawg.
d. Cov khoom xyaw:
Muaj kev sib sau ua ke xws li surfactants, dispersants, polymers thiab stabilizers tuaj yeem cuam tshuam kev sib pauv cuam tshuam, rheological cov khoom siv thiab colloidal ruaj khov. Cov qauv zoo tshaj plaws tsim qauv yog qhov tseem ceeb kom ua tiav qhov kev xav tau cov khoom uas xav tau.
e. Kev Cia Cai Cia:
Kev Cia Mob Cia Khoom, suav nrog qhov kub thiab cov av noo, thiab ntim, tuaj yeem cuam tshuam rau kev rov qab los ntawm cov hmoov tawv ntawm cov hmoov. Qhov tsim nyog cia cov kev coj ua yog qhov tsim nyog los txo cov kev tsis ntseeg, clumping, lossis agglomeration, uas tuaj yeem cuam tshuam redispersibility.
4. Cov hau kev rau kev ntsuas kev rov ua haujlwm:
Muaj ntau txoj hauv kev muaj los ntsuas qhov recispersibility ntawm cov khoom siv, xws li pom kev pom yooj yim. Cov hau kev siv ntau yam suav nrog:
A. Kuaj qhov muag:
Kev tshuaj xyuas pom ntawm kev coj cwj pwm, suav nrog kev ntub dej, ohglomeration, thiab emulmomation, thiab emulsification, tuaj yeem muab cov kev pom zoo rau hauv kev rov ua haujlwm.
b. Tus nqi sib hais haum:
Kev ntsuas ntawm kev daws teeb meem lossis kev ntsuas tus nqi tshaj sijhawm tuaj yeem qhia qhov kev ruaj ntseg thiab kev sib txawv ntawm cov khoom sib cais, nrog cov qis dua hluav taws xob qhia tau zoo dua kev rov ua dua.
C. Kev soj ntsuam me me loj:
Cov txheej txheem tshuaj xyuas me me loj xws li laser diffraction (DNS) lossis microscopy tuaj yeem ntsuas qhov ntsuas me me thiab ntsuas cov degrooromeration lossis dispersion.
d. Rheological khoom:
Rheatorical ntsuas, suav nrog kev tawm tsam, tawm tsam, thixotropy, thiab ntws tus cwj pwm, tuaj yeem ruaj, thiab ntws cov yam ntxwv ntawm cov qauv recispersed.
e. Tshuaj Ntsuam Xyuas Tshuaj:
Tshuaj ntsuam xyuas tshuaj lom neeg xws li Fourier Transformy (FTIR), XRD), XRD) lossis cov kev hloov pauv theem thiab tshuaj lom neeg ruaj khov.
5. Cov tswv yim los txhim kho cov rhaspersion:
Txhawm rau txhim kho cov recispersibility ntawm cov khoom siv, muaj ntau hom kev ua kom zoo, particle engineering, kev hloov kho kom zoo, thiab cov txheej txheem tshiab. Cov tswv yim tseem ceeb muaj xws li:
A. Txo qhov loj me me:
Txo cov particle loj los ntawm kev sib tsoo, micronization lossis nanotechnology cov tswv yim nce thaj chaw thaj npoo av thiab txhawb nqa nrawm nrawm thiab cuam tshuam hauv cov xov xwm ua kua.
b. Kho qauv:
Kev hloov kho cov txheej txheem deg, xws li cov tshuaj tsuag, cov txheej txau, tuaj yeem hloov cov khoom siv tshuaj pleev xim rau cov khoom siv thiab morphology ntawm cov khoom siv kom zoo dua.
C. Daim Ntawv Qhia Txog Kev Txhim Kho:
Ua kom zoo rau kev tsim cov qauv sib xyaw los ntawm kev sib xyaw ua ke, dispersants tuaj yeem txhim kho kev ntub dej, kev faib tawm thiab colloidal ruaj khov, ua rau muaj kev rov qab zoo dua.
d. Encapsulation:
Qhov encapsulating cov khoom hauv microcapsules lossis nanoparticles tiv thaiv lawv los ntawm agglomeration, noo thiab tswj lawv recispersibility hla lub sijhawm ntev dua.
e. Cov txheej txheem kev xav tau:
Cov txheej txheem hauv tshuab hluav taws xob tsim hluav taws xob zoo li no xws li microfluidics muaj lub sijhawm los ua cov hmoov zoo nrog cov hmoov uas cov khoom sib txawv thiab ua kom zoo dua qub.
Recispersibility yog qhov tseem ceeb ntawm cov khoom siv uas cuam tshuam rau lawv qhov dispersibility, kev ruaj khov thiab ua tau zoo hauv cov qauv ua kua. Nkag siab txog qhov cuam tshuam uas cuam tshuam txog kev rov qab, thiab siv cov kev tshuaj ntsuam uas tsim nyog, thiab siv cov khoom siv uas tsim nyog tau txais cov hmoov uas xav tau nrog kev lag luam. Los ntawm kev nce qib peb cov kev paub thiab thev naus laus zis hauv kev faib tawm, peb tuaj yeem qhib cov cib fim tshiab rau kev tsim kho tshiab thiab kev txhim kho cov khoom lag luam uas txhim kho
Lub Sijhawm Post: Feb-19-2025