Methylhydroxyethylcellulose (MHEC) inoita basa rakakosha mukuvandudza kuwirirana kweputty, chinhu chinoshandiswa zvakanyanya mumaindasitiri akasiyana siyana anosanganisira kuvaka, mota nekugadzira.Ichi chinyorwa chinopa kuongororwa kwakadzama kwezvinhu zveMHEC uye kukosha kwayo pakuvandudzwa kweputty kusawirirana.Inotsvaga makemikari ekuumbwa, zvimiro zvemuviri, uye maitiro ekuita kweMHEC mune putty formulations.
Putty chinhu chakasiyana-siyana chinoshandiswa zvakanyanya mukuvaka, kugadzirisa mota, kugadzira uye akasiyana mamwe maindasitiri.Kuenderana kwayo chinhu chakakosha pakuona kushandiswa kwayo uye kushanda kwayo mumashandisirwo akasiyana.Kuwana kuenderana kunodiwa kweputty kunoda kugadzirisa matambudziko akasiyana senge viscosity control, kushanda uye anonamira zvivakwa.Methylhydroxyethylcellulose (MHEC) inobuda sechinhu chikuru chekuwedzera icho chinowedzera kuwirirana kweputty uku ichiwedzera maitiro ayo ekuita.
1. Kuumbwa kwemakemikari uye zvinhu zvemuviri zveMHEC
MHEC is nonionic cellulose ether inowanikwa nemakemikari ekugadzirisa cellulose.Inogadzirwa nekuita cellulose ne ethylene oxide uye methyl chloride kuunza hydroxyethyl uye methyl mapoka mu cellulose main cheni.Iyo dhigirii yekutsiva (DS) yehydroxyethyl uye methyl mapoka anokanganisa zvakanyanya zvimiro zveMHEC, kusanganisira solubility, viscosity, uye rheological maitiro.
Iyo molecular chimiro cheMHEC inopa iyo yakasarudzika zvivakwa, ichiita kuti ive yakanaka kune akasiyana maapplication, kusanganisira putty formulations.MHEC ine yakanakisa solubility yemvura uye inoumba yakajeka uye yakagadzikana mhinduro kana yakapararira mumvura.Iyi solubility hunhu inofambisa kunyange kugovera mukati meiyo putty matrix, kuve nechokwadi chekuita kunoenderana kubva pabatch kuenda kune batch.
MHEC inopa pseudoplastic rheological maitiro kune putty formulations, zvichireva kuti viscosity yayo inoderera nekuwedzera shear rate.Iyi rheological pfuma inosimudzira iyo putty's workability, nyore kushandisa uye kuumbwa, uku ichichengetedza yakaringana sag kuramba uye thixotropic maitiro.
MHEC ine yakanakisa firimu-inogadzira zvinhu, inobatsira kuvandudza iyo yakabatana simba uye kunamatira kweiyo putty kune substrate pamusoro.Kugona kwayo kugadzira firimu kunogadzira chipingamupinyi chekudzivirira, kuwedzera kusimba uye kuramba kwemamiriro ekunze, zvichiita kuti putty ikwane kwekushandisa kunze.
2. Iyo nzira yekuita kweMHEC mune putty formulations
Basa reMHEC mukuvandudza kuwirirana kweputty rakawanda uye rinosanganisira nzira dzakawanda dzekuita dzinopesvedzera rheological uye maitiro ekuita.
Imwe nzira yekutanga ndeye hydration uye kuzvimba kweMHEC mamorekuru mumvura-based putty formulations.Kana yakaparadzirwa mumvura, iyo MHEC maketani anonyorova, zvichikonzera kuumbwa kwe hydrated polymer network mukati me putty matrix.Ichi chimiro chetiweki chinopa iyo putty viscosity uye pseudoplastic maitiro, ichiibvumira kuyerera zviri nyore pasi pekunetseka kwekuveura uku ichichengetedza chimiro chayo uye kubatana.
MHEC inoita seyakakora nekuwedzera viscosity yechikamu chemvura mune putty formula.Iyo hydrophilic chimiro cheMHEC inokurudzira kuchengetedza kwemvura, kudzivirira yakawandisa evaporation uye kuoma kwe putty panguva yekushandiswa.Uku kugona kubata mvura kunowedzera nguva yakavhurika yeputty, ichiibvumira nguva yakakwana yekushanda isati yaseta, ichiwedzera kuchinjika kwekushandisa uye kuderedza kutambisa zvinhu.
MHEC inoshanda sebhainda uye yakagadzikana mune putty formulations.Nekugadzira zvisungo zvehydrogen nezvimwe zvinhu zvakaita semafirita, pigment uye mapolymer.Kudyidzana uku kunokurudzira kufanana uye kupararira kweyunifomu yezvinowedzera mukati me putty matrix, nekudaro kunowedzera michina zvimiro, kuenderana kwemavara uye kuita kwese.
MHEC inobatsira kune thixotropic maitiro eiyo putty, zvichireva kuti inoratidza yakakwira viscosity pakuzorora uye yakaderera viscosity pasi pekunetseka kweshear.Ichi chivakwa chinofambisa nyore kushandisa uye kupararira kweiyo putty uku ichidzivirira kudonha kana kudonha panzvimbo dzakamira.Iyo thixotropic chimiro che putty formulations ine MHEC inova nechokwadi chekuvhara kwakakwana uye kufanana kweakaiswa maseru, nekudaro inosimudzira aesthetics uye pamusoro pekupedzisira.
3. Zvinhu zvinokanganisa kusimba kweputty uye basa reMHEC
Pane zvakawanda zvinhu zvinokanganisa kuenderana kwe putty mafomula, kusanganisira mhando uye mhando yezvigadzirwa, fomula paramita, mamiriro ekugadzirisa uye zvakatipoteredza.MHEC inoita basa rakakosha mukugadzirisa zvinhu izvi uye nekugadzirisa putty kuenderana kuti isangane nezvinodiwa zvekuita.
Chinhu chakakosha kukura kwechidimbu uye kugovera kwemafirita uye pigment mune putty kugadzirwa.Fine particles anowanzo kuwedzera viscosity uye thixotropy, nepo coarse particles inogona kuderedza kuyerera uye kufanana.MHEC inobatsira kudzikisa nyaya idzi nekusimudzira kupararira kweyunifomu uye kumiswa kwezvikamu mukati meiyo putty matrix, kuve nechokwadi chinowirirana viscosity uye rheological maitiro.
Huyero uye kuenderana kwezvikamu zvakasiyana mune putty formula zvinokanganisawo kuenderana uye kuita kweiyo putty.MHEC inoshanda seanopindirana uye rheology modifier, inokurudzira kusanganiswa kwezvakasiyana-siyana zvekuwedzera senge resins, plasticizers uye rheology modifiers.Zvimiro zvaro zvakasiyana-siyana zvinobvumira vanogadzira kuti vagadzirise uye kugadzirisa zvakanaka iyo putty's rheological properties kune chaiyo application zvinodiwa.
Kugadzirisa ma paramita akadai sekusanganisa kumhanya, tembiricha, uye shear rate inogona kukanganisa kupararira uye kupindirana kweMHEC mune putty formulations.Kugadzirisa aya maparamendi kunogonesa hydration uye activation yeMHEC mamorekuru, kuwedzera kukora, kudzikamisa, uye kusunga mhedzisiro.
Uye zvakare, mamiriro ezvakatipoteredza senge humidity, tembiricha uye substrate pamusoro pezvivakwa zvinogona kukanganisa mashandisiro uye kurapa maitiro e putty.MHEC inosimudzira kuchengetedza kwemvura uye kunamatira zvimiro zveputty, zvichiita kuti ive yakakodzera kune dzakasiyana siyana mamiriro ezvakatipoteredza uye substrate zvinhu.
4. Maitiro ekushandisa uye kufunga nezveyero
Kunyatsoshandiswa kweMHEC mune putty formulations kunoda kunyatsotariswa kwemaitiro ekushandisa uye mazinga emuyero kuti uwane kuenderana kunodiwa uye maitiro ekuita.Kusanganisa kwakakodzera, kushandisa uye kurapa maitiro kwakakosha kuti uve nechokwadi chekugovera yunifomu uye activation yeMHEC mukati meiyo putty matrix.
Munguva yekugadzirwa kwekugadzirisa, zvakakosha kuti uone huwandu hwakakwana hweMHEC zvichienderana nezvinodiwa zvekushanda zvakadai seviscosity, sag resistance, uye nguva yekuomesa.Huwandu hweMHEC hunoshandiswa hunogona kusiyana zvichienderana nezvinhu zvakaita seputty type, nzira yekushandisa, substrate mamiriro uye zvakatipoteredza.
Zvichienderana nemhando ye substrate, inodiwa pamusoro pekupedzisira uye zvinodiwa zvepurojekiti, nzira dzakasiyana dzekuvaka dzinogona kushandiswa, kusanganisira kupuruzira ruoko, kupfapfaidza uye extrusion.Putty maumbirwo ane MHEC anoratidza kugarisana kwakanaka nenzira dzakasiyana dzekushandisa, achibvumira kuita zvakasiyana uye kuchinjika mukushandisa.
Nguva yekutumira: Feb-28-2024