Nyob rau hauv daim ntawv nplaum, cellulose ether, raws li ib qho tseem ceeb additive, muaj ib tug ntau yam ntawm cov yam ntxwv tshwj xeeb thiab tuaj yeem txhim kho qhov ua tau zoo ntawm cov nplaum. Cellulose ether tebchaw yog muab los ntawm tej yam ntuj tso cellulose thiab yog chemically modified derivatives, xws li hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), carboxymethylcellulose (CMC), thiab lwm yam. Nws muaj ntau yam kev siv hauv cov nplaum thiab coj ntau yam txiaj ntsig rau cov qauv.
1. Cov khoom tseem ceeb ntawm cellulose ethers
Cellulose ether yog tsim los ntawm kev hloov kho tshuaj ntawm ntuj cellulose thiab yog ib qho tsis-ionic polymer compound. Nws cov yam ntxwv tseem ceeb muaj xws li cov hauv qab no
Solubility: Cellulose ether tuaj yeem yaj hauv dej txias lossis kub los tsim cov tshuaj colloidal ruaj khov. Nws solubility nyob ntawm hom thiab qib ntawm kev hloov pauv ntawm cov khoom hloov, thiab nws cov solubility tuaj yeem hloov kho los ntawm kev tswj cov qauv ntawm cellulose ether.
Thickening: Cellulose ethers muaj cov nyhuv thickening zoo hauv dej thiab tuaj yeem muab kev txhim kho viscosity tseem ceeb ntawm qhov tsis tshua muaj siab. Qhov no tso cai rau nws ua si viscosity tswj lub luag haujlwm hauv cov ntawv nplaum.
Zaj duab xis-forming zog: Cellulose ether tuaj yeem tsim muaj zog, pob tshab zaj duab xis tom qab ziab. Qhov no feature yog heev haum rau daim ntawv thov nyob rau hauv lub teb ntawm adhesives thiab pab nyob rau hauv lub shaping thiab zaum kawg curing ntawm cov nplaum txheej.
Biodegradability: Cellulose ether yog muab los ntawm cov khoom siv ntuj tsim, muaj biocompatibility zoo thiab degradability, thiab yuav tsis ua rau muaj kuab paug mus ntev rau ib puag ncig.
2. Lub tshuab ua haujlwm ntawm cellulose ether hauv cov nplaum
Cellulose ethers ua si ntau lub luag hauj lwm nyob rau hauv daim ntawv nplaum, nrog rau cov thickeners, stabilizers, film-forming agents, thiab rheology modifiers. Nws lub ntsiab mechanism ntawm qhov kev txiav txim tuaj yeem sau tau raws li hauv qab no:
Thickening thiab suspending teebmeem: Cellulose ethers hauv cov nplaum tuaj yeem ua rau kom cov viscosity ntawm cov mis thiab txhim kho cov nplaum txheej txheej thiab sag kuj. Rau cov nplaum uas muaj cov khoom siv, cellulose ether tuaj yeem faib cov khoom sib npaug hauv cov tshuaj, tiv thaiv lawv los ntawm kev teeb tsa, thiab pab txhim kho qhov kev ncua thiab khaws cia ruaj khov ntawm cov nplaum.
Txhim kho cov txheej txheem thiab kev tsim kho: Los ntawm kev kho cov rheology ntawm cov nplaum, cellulose ethers tuaj yeem ua rau cov nplaum nplaum ntau dua thiab du thaum txheej txheej, txo cov teeb meem fluidity thaum tsim kho. Nws tuaj yeem tiv thaiv cov nplaum los ntawm sagging thaum siv rau ntawm qhov chaw ntsug, ua rau nws tsim nyog rau txheej ntsug.
Zaj duab xis-forming thiab curing adjustment: Cov zaj duab xis-tsim cov cuab yeej ntawm cellulose ether nyob rau hauv cov nplaum ua rau nws tsim ib tug nruam adhesive zaj duab xis thaum lub sij hawm ziab txheej txheem, yog li txhim kho lub zog sib txuas. Cov yeeb yaj kiab tsim los ntawm nws tuaj yeem ua lub luag haujlwm tiv thaiv, tiv thaiv cov dej noo hauv cov nplaum nplaum los ntawm evaporating sai heev, thiab pab cov nplaum nplaum sib npaug sib npaug hauv qhov chaw sib txawv.
Txhim kho dej tsis kam thiab khov tiv thaiv: Hloov kho cellulose ether muaj cov dej tsis zoo thiab khov-thaw lub voj voog, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov nplaum. Nws tso cai rau cov nplaum los tuav lub zog sib txuas hauv qhov chaw ntub dej, tiv thaiv softening thiab tev ntawm cov nplaum txheej, thiab tswj kom zoo elasticity thiab adhesion nyob rau hauv qis kub.
3. Qhov zoo ntawm cellulose ethers nyob rau hauv daim ntawv nplaum
Txhim khu kev sib txuas lub zog: Cov yeeb yaj kiab tsim cov khoom ntawm cellulose ether tuaj yeem txhim kho lub zog ntawm cov nplaum nplaum, tshwj xeeb tshaj yog rau cov nplaum hauv kev tsim kho, xws li cov nplaum nplaum, plastering adhesives, thiab lwm yam. nplaum txheej. Knot kev ua tau zoo thiab durability.
Optimize rheology thiab operability: Lub peev xwm ntawm cellulose ether los tswj cov rheology ntawm cov nplaum tuaj yeem txhim kho cov txheej txheem txheej thaum lub sijhawm ua haujlwm, tsis txhob sagging, thiab txhim kho kev tsim kho. Tsis tas li ntawd, nws ruaj khov nyob rau hauv qhov kub thiab txias los yog high humidity ib puag ncig ua rau nws haum rau ntau yam kev tsim kho.
Lub sijhawm qhib qhib: Thaum lub sijhawm tsim kho, cellulose ether tuaj yeem ncua lub sijhawm ziab ntawm cov nplaum, muab sijhawm rau cov neeg ua haujlwm hloov kho thiab kho, tshwj xeeb tshaj yog tsim rau thaj tsam loj ntawm kev tsim kho. Cov cuab yeej no yog qhov tseem ceeb tshwj xeeb hauv cov txheej txheem nplaum uas yuav tsum tau ua haujlwm zoo, xws li kev tsim cov nplaum thiab cov nplaum nplaum.
Ib puag ncig tus phooj ywg khoom: Cellulose ether yog cov khoom siv ntuj tsim thiab muaj biodegradability zoo. Piv nrog rau cov khoom siv hluavtaws polymer ntxiv, nws yog ib puag ncig zoo thiab yuav tsis ua rau muaj kuab lom mus ntev rau ib puag ncig. Nws yog nyob rau hauv txoj kab nrog tam sim no txoj kev loj hlob ntawm ntsuab thiab ib puag ncig tiv thaiv.
Txhim kho huab cua tsis kam: Cellulose ether tuaj yeem txhim kho qhov kev laus ntawm cov nplaum thiab tiv thaiv kev ua haujlwm ntawm cov nplaum nplaum los ntawm kev poob qis nyob rau lub sij hawm ntev ultraviolet hluav taws xob los yog huab cua hnyav. Nws cov khoom antioxidant kuj tseem pab txhawb lub neej ntawm cov nplaum.
4. Kev siv tswv yim teb
Cellulose ethers tau siv dav hauv ntau yam khoom siv nplaum, thiab lawv cov chaw thov suav nrog tab sis tsis txwv rau:
Kev tsim kho adhesives: Hauv kev tsim kho, cellulose ethers tau siv dav hauv cov nplais nplaum, cov tshuaj khib nyiab qhuav, sab hauv thiab sab nrauv phab ntsa plastering adhesives thiab lwm yam khoom los txhim kho lawv kev tsim kho, dej tsis kam thiab kev sib khi lub zog.
Daim ntawv thiab ntim: Cov yeeb yaj kiab tsim cov khoom thiab cov dej zoo solubility ntawm cellulose ethers ua rau lawv cov khoom xyaw zoo tagnrho hauv cov ntawv nplaum thiab cov ntawv khi cov nplaum.
Kev ua ntoo: Hauv cov nplaum ntoo, cov khoom ua kom tuab thiab cov khoom sib txuas ntawm cellulose ethers pab txhim kho kev sib raug zoo ntawm cov ntaub ntawv xws li plywood thiab fiberboard.
Kev kho kom zoo nkauj hauv tsev: Hauv cov nplaum rau kev kho kom zoo nkauj hauv tsev xws li cov nplaum nplaum nplaum thiab cov ntaub pua plag, kev siv cov cellulose ether ua rau nws yooj yim dua rau cov tsho loj thiab muaj lub sijhawm qhib zoo thiab cov khoom ua yeeb yaj kiab.
Raws li cov khoom tseem ceeb hauv cov nplaum nplaum, cellulose ether muaj ntau yam haujlwm xws li thickening, film-forming, thiab rheology adjustment, thiab tuaj yeem txhim kho cov nplaum ua haujlwm tau zoo, kev ruaj khov, thiab kav ntev. Tsis tas li ntawd, nws cov khoom tiv thaiv ib puag ncig zoo thiab biocompatibility kuj ua rau nws yog ib qho tseem ceeb ntxiv rau hauv kev lag luam nplaum nyob rau hauv cov ntsiab lus ntawm kev nrhiav tam sim no ntawm ntsuab thiab kev tsim kho kom ruaj khov.
Post lub sij hawm: Sep-26-2024