Methylcellulose yog ntau yam thiab ntau yam sib xyaw uas muaj kev siv ntau yam kev lag luam vim nws cov khoom tshwj xeeb.Qhov no polysaccharide derivative muab tau los ntawm cellulose yog nrov rau nws muaj peev xwm ua si ntau yam ntawm lub luag hauj lwm nyob rau hauv txawv teb.
Chemical zog ntawm methylcellulose:
Methylcellulose yog synthesized los ntawm etherification ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa.Cellulose yog tsim los ntawm cov piam thaj uas txuas los ntawm β-1,4-glycosidic bonds.Cov txheej txheem etherification suav nrog hloov cov pab pawg hydroxyl hauv cov qauv cellulose nrog methyl pawg.Qhov kev hloov kho tshuaj no muab cov txiaj ntsig methylcellulose cov khoom tshwj xeeb, ua rau nws soluble hauv dej hauv qee yam mob.
Qhov degree ntawm kev hloov pauv (DS) sawv cev rau qhov nruab nrab ntawm cov pab pawg hydroxyl hloov los ntawm methyl pawg rau txhua chav tsev piam thaj hauv cov saw cellulose, cuam tshuam rau solubility, viscosity thiab gel-forming peev xwm ntawm methylcellulose.Raws li DS nce, solubility nyob rau hauv dej thiab tag nrho versatility ntawm lub compound nce.
Cov yam ntxwv ntawm methylcellulose:
Dej Solubility: Ib qho ntawm cov laj thawj tseem ceeb rau kev siv methylcellulose yog nws cov dej solubility.Nws nthuav tawm tus cwj pwm tshwj xeeb hauv cov kev daws teeb meem aqueous - tsim cov kua dej ntshiab thiab khov thaum yaj hauv dej txias.Cov cuab yeej no yog qhov tseem ceeb hauv cov ntawv thov xws li kev lag luam khoom noj mus rau kws tshuaj.
Thermal gelation: Methylcellulose tau dhau los ua cov txheej txheem rov qab gelation nyob ntawm qhov kub thiab txias.Thaum rhuab, ib tug aqueous tov ntawm methylcellulose tsim ib gel, thiab thaum txias, lub gel rov qab mus rau ib tug tov.Cov cuab yeej no muaj txiaj ntsig tshwj xeeb hauv kev npaj cov gels thiab tswj kev xa tshuaj.
Lub peev xwm ua yeeb yaj kiab: Methylcellulose cov ntaub ntawv ntshiab thiab hloov tau yooj yim haum rau cov ntawv thov hauv kev lag luam khoom noj xws li coatings, adhesives thiab edible films.Cov khoom ua yeeb yaj kiab raug cuam tshuam los ntawm cov yam ntxwv xws li concentration, kub thiab muaj lwm yam khoom ntxiv.
Rheological zog: Methylcellulose qhia shear thinning cwj pwm, uas txhais tau hais tias nws viscosity txo nyob rau hauv shear stress.Cov cuab yeej no muaj txiaj ntsig zoo hauv cov ntawv thov xws li cov xim uas yuav tsum tau siv yooj yim thiab cov khoom yuav tsum tau rov ua dua nws cov viscosity tom qab thov.
Biocompatibility: Biocompatibility ntawm methylcellulose yog qhov tseem ceeb hauv kev siv tshuaj thiab biomedical.Nws yog feem ntau suav hais tias muaj kev nyab xeeb rau kev siv tshuaj npaj vim nws tsis muaj tshuaj lom thiab tsis ua rau mob.Qhov no tau ua rau nws koom ua ke rau ntau yam khoom siv tshuaj, suav nrog cov tshuaj kho qhov muag thiab kev tswj hwm-tso tshuaj xa cov tshuab.
Kev siv ntawm methylcellulose:
kev lag luam zaub mov:
Thickening tus neeg sawv cev: Methylcellulose yog siv los ua tus neeg sawv cev thickening hauv cov khoom noj xws li kua ntses, hnav khaub ncaws thiab kua zaub vim nws muaj peev xwm ua kom cov viscosity tsis hloov qhov tsw lossis cov tsos ntawm cov khoom kawg.
Kev hloov rog: Hauv cov khoom noj uas tsis muaj rog lossis tsis muaj rog, methylcellulose tuaj yeem ua raws li kev ntxhib los mos thiab lub qhov ncauj ntawm cov rog, ua kom muaj kev paub zoo.
tshuaj:
Tablet Binders: Methylcellulose yog siv los ua cov ntawv khi hauv kev lag luam kws tshuaj los txhim kho kev sib koom ua ke ntawm cov khoom xyaw hauv cov ntsiav tshuaj thiab xyuas kom meej tias cov ntsiav tshuaj nyob twj ywm thaum tsim khoom thiab siv.
Ophthalmic Solutions: Lub pob tshab ntawm methylcellulose hauv cov tshuaj aqueous ua rau nws tsim nyog rau kev siv tshuaj kho qhov muag xws li cov tee dej thiab cov tshuaj tiv thaiv kab mob.
Kev tsim kho kev lag luam:
Cement thiab Mortar Additives: Methylcellulose yog ntxiv rau cov cement thiab mortar formulations los txhim kho kev ua haujlwm, dej tuav thiab adhesion.Nws tiv thaiv kom qhuav sai, cia kom zoo dua daim ntawv thov thiab kho.
Paints thiab Coatings:
Thickeners thiab Stabilizers: Methylcellulose yog siv los ua cov thickener thiab stabilizer hauv cov xim dej thiab cov txheej txheem los pab ua kom tiav qhov xav tau sib xws thiab tiv thaiv cov xim xim.
Textile kev lag luam:
Sizing tus neeg saib xyuas: Hauv kev ua textile, methylcellulose yog siv los ua tus neeg sawv cev sizing los txhim kho qhov smoothness thiab lub zog ntawm fibers.Nws muab cov txheej txheem tiv thaiv thaum lub sij hawm weaving thiab tiv thaiv fiber ntau tawg.
Cov khoom siv tu tus kheej:
Cosmetic formulations: Methylcellulose yog muab tso rau hauv cov tshuaj pleev ib ce xws li cream thiab lotions vim nws emulsion stabilizing thiab thickening zog.
Kev lag luam roj thiab roj:
Drilling Fluid Additive: Methylcellulose yog siv nyob rau hauv drilling kua nyob rau hauv cov roj thiab roj kev lag luam los tswj viscosity thiab kua poob los xyuas kom meej drilling hauj lwm zoo.
Ntawv thiab ntim:
Coating Additive: Methylcellulose yog siv los ua txheej txheej rau cov ntawv thiab txheej ntim cov ntaub ntawv los txhim kho kev luam ntawv, nto du thiab dej tsis kam.
Detergent:
Stabilizers nyob rau hauv Detergents: Methylcellulose tuaj yeem muab ntxiv rau cov kua tshuaj ntxuav tes ua tus stabilizer los tiv thaiv theem sib cais thiab txhim kho tag nrho kev ruaj ntseg ntawm cov qauv.
Kev siv biomedical:
Kev xa tshuaj: Methylcellulose yog siv los tsim cov kev tswj hwm-tso tshuaj xa cov tshuab, thiab nws cov khoom siv thermogelling tso cai rau kev tso tawm cov tshuaj nyob rau lub sijhawm.
3D luam ntawv:
Cov khoom siv txhawb nqa: Hauv 3D luam ntawv, methylcellulose tuaj yeem siv los ua cov khoom txhawb nqa, uas tuaj yeem tshem tau yooj yim tom qab luam ntawv vim nws cov dej solubility.
Methylcellulose yog ib qho zoo heev thiab ntau yam sib xyaw nrog kev siv thoob plaws ntau yam kev lag luam.Nws qhov tshwj xeeb ua ke ntawm dej solubility, thermal gelling, zaj duab xis-tsim muaj peev xwm thiab biocompatibility ua rau nws muaj txiaj ntsig zoo hauv cov khoom noj, tshuaj, khoom siv hauv tsev, xim, textiles, khoom tu tus kheej thiab lwm yam.Raws li kev siv thev naus laus zis thiab kev lag luam txuas ntxiv mus ntxiv, kev siv ntau yam ntawm methylcellulose ua kom nws qhov cuam tshuam thiab kev siv txuas ntxiv hauv kev ua kom tau raws li cov kev xav tau ntawm ntau yam kev lag luam.
Post lub sij hawm: Dec-21-2023