Yintoni usetyenziso lweCellulose Ether?

Yazisa ukulungiswa kwe-ether cellulose, ukusebenza kwe-cellulose ether kunyeisicelo se-ether cellulose, ngakumbi isicelo kwiingubo.
Amagama angundoqo: i-cellulose ether, ukusebenza, ukusetyenziswa
I-Cellulose yinto yendalo ye-macromolecular.Ubume bayo beekhemikhali yi-polysaccharide macromolecule ene-anhydrous β-glucose njengeringi yesiseko.Kukho iqela eliphambili le-hydroxyl kunye namaqela amabini e-hydroxyl yesibini kwiringi yesiseko nganye.Ngokuguqulwa kwayo kweekhemikhali, uchungechunge lwe-cellulose derivatives lunokufumaneka, kwaye i-cellulose ether yenye yazo.I-cellulose ethers isetyenziswa ngokubanzi kumashishini amaninzi.

1.Ukulungiselela

I-ether ye-cellulose ifunyenwe ngokuphendula i-cellulose kunye ne-NaOH, emva koko isabela ngee-monomers ezahlukeneyo ezisebenzayo ezifana ne-monochloromethane, i-ethylene oxide, i-propylene oxide, njl., kunye nokuhlamba ityuwa ephuma kwimveliso kunye ne-sodium cellulose.

2.Ukusebenza

2.1 Imbonakalo: I-Cellulose ether imhlophe okanye i-milky white, ayinavumba, ayinayo ityhefu, i-fibrous powder kunye ne-fluidity, kulula ukufunxa ukufuma, kwaye inyibilika kwi-colloid ebonakalayo ebonakalayo ebonakalayo emanzini.
2.2 Ionicity: MC, MHEC, MHPC, HEC are nonionic;I-NaCMC, iNaCMHEC zi-anionic.
I-2.3 I-Etherification: Iimpawu kunye neqondo le-etherification ye-etherification iya kuchaphazela ukusebenza kwe-cellulose ether ngexesha le-etherification, njengokunyibilika, ukukwazi ukwenza ifilimu, amandla okudibanisa kunye nokuxhathisa ityuwa.
2.4 Ukunyibilika: (1) I-MC iyanyibilika emanzini abandayo, ayinyibiliki emanzini ashushu, kwaye iyanyibilika kwezinye izinyibilikisi;I-MHEC i-soluble emanzini abandayo, ayinyibiliki emanzini ashushu kunye ne-organic solvents.Nangona kunjalo, xa isisombululo se-aqueous se-MC kunye ne-MHEC sifudumala, i-MC kunye ne-MHEC iya kunyuka.I-MC idlula kwi-45-60 ° C, ngelixa i-precipitation ye-MHEC edibeneyo etherified iphakama ukuya kwi-65-80 ° C.Xa iqondo lobushushu lithotyiwe, imvula iphinda ichitheke.(2) I-HEC, i-NaCMC, kunye ne-NaCMHEC iyanyibilika emanzini nakweyiphi na iqondo lokushisa, kodwa ayinyibiliki kwi-solvents ye-organic (ngaphandle kwezinto ezimbalwa).
2.5 Ukudumba okulibazisekileyo: I-Cellulose ether inokudumba okuthile okulibaziseka kumanzi angathathi hlangothi e-pH, kodwa inokukoyisa oku kudumba kulibaziseka kumanzi e-alkaline pH.
2.6 I-Viscosity: I-cellulose ether inyibilika emanzini ngendlela ye-colloid, kwaye i-viscosity yayo ixhomekeke kwinqanaba le-polymerization ye-cellulose ether.Isisombululo siqulethe i-hydrated macromolecules.Ngenxa yokubanjiswa kwee-macromolecules, indlela yokuhamba kwezisombululo iyahluka kuleyo ye-Newtonian fluids, kodwa ibonisa ukuziphatha okutshintsha ngamandla okucheba.Ngenxa yesakhiwo se-macromolecular ye-cellulose ether, i-viscosity yesisombululo ikhula ngokukhawuleza ngokunyuka koxinzelelo kwaye iyancipha ngokukhawuleza ngokunyuka kweqondo lokushisa.
2.7 Uzinzo lwebhayoloji: I-ether ye-cellulose isetyenziswa kwisigaba samanzi.Ngethuba nje amanzi ekhona, iibhaktheriya ziya kukhula.Ukukhula kweebhaktheriya kukhokelela ekuvelisweni kweebhaktheriya ze-enzyme.I-enzyme iphula iibhondi zeyunithi ye-anhydroglucose engafakwanga ecaleni kwe-ether ye-cellulose, inciphisa ubunzima bemolekyuli yepolymer.Ngoko ke, ukuba i-cellulose ether isisombululo se-aqueous kufuneka sigcinwe ixesha elide, i-preservative kufuneka yongezwe kuyo.Oku kuyinyani nakwi-antimicrobial cellulose ethers.

3. Injongo

3.1 I-Oilfield: I-NaCMC isetyenziswa kakhulu ekusetyenzisweni kwendawo yeoli, kwaye isetyenziselwa ukwenza udaka ukwandisa i-viscosity kunye nokunciphisa ilahleko yamanzi.Iyakwazi ukuxhathisa ungcoliseko lwetyuwa oluyinyibilikayo ezahlukahlukeneyo kwaye iphucule ukubuyiswa kweoli.I-sodium carboxymethyl hydroxypropyl cellulose kunye ne-sodium carboxymethyl hydroxyethyl cellulose zi-ejenti ezilungileyo zokwemba udaka kunye nezixhobo zokulungiselela ulwelo olugqityiweyo, kunye nesantya esiphezulu se-pulping, ityuwa elungileyo kunye nokumelana ne-calcium, Inekhono elihle lokunyusa i-viscosity kunye nokumelana nokushisa (160 ° C).Ilungele ukulungiselela ulwelo olugqityiweyo lwamanzi amatsha, amanzi olwandle kunye namanzi anetyuwa ahluthisiweyo.Inokuqulunqwa kwi-fluid yokugqitywa kwee-densities ezahlukeneyo (1.03-1.279 / Cm3) phantsi kobunzima be-calcium chloride, kwaye ine-viscosity ethile.Kwaye ilahleko esezantsi yolwelo, i-viscosity yayo eyonyusayo amandla kunye nokulahleka kolwelo lokunciphisa amandla angcono kune-hydroxyethyl cellulose, sisongezo esilungileyo sokunyusa imveliso yeoli.
3.2 Iiseramikhi zokwakha: I-NaCMC ingasetyenziswa njengeretarder, i-arhente yokugcina amanzi, i-thickener kunye ne-binder, ukuze iimveliso zeseramic eziveliswayo zibe nenkangeleko entle kwaye kungabikho ziphene namaqamu.
3.3 Ukwenza amaphepha: I-NaCMC isetyenziselwa ukulinganisa kwangaphakathi nangaphandle kunye nokuzaliswa kunye nokugcinwa komphezulu wephepha, kwaye inokutshintsha i-casein, ukuze i-inki yokuprinta ingene ngokulula kwaye imiphetho icace.Ekwenzeni iphepha lodonga, inokusetyenziswa njenge-pigment dispersant, tackifier, stabilizer kunye ne-agent yokulinganisa.
3.4 Izinto ezilukiweyo: I-NaCMC isetyenziswa endaweni yokutya okuziinkozo kunye nokulinganisa kwishishini lempahla yamalaphu, kwaye akukho lula ukuwohloka nokungunda.Xa uprinta kunye nokudaya, akukho mfuneko yokwenza i-desizing, kwaye idayi inokufumana i-colloid efanayo emanzini, eyandisa i-hydrophilicity kunye nokungena kwedayi.Ngexesha elifanayo, ngenxa yotshintsho oluncinci kwi-viscosity, kulula ukulungisa umehluko wombala.I-CMHEC isetyenziswa njenge-thickener yokuprinta kunye nokudaya i-pulp, kunye nentsalela encinci kunye nesivuno esiphezulu sombala, kwaye umgangatho wokushicilela kunye nokudaya uphezulu kakhulu kunemveliso ye-ether ye-ionic kunye ne-non-ionic cellulose.
3.5 Icuba: I-NaCMC isetyenziselwa ukudibanisa icuba.Ichithwa ngokukhawuleza kwaye inamandla okubambisana okunamandla, okunenzuzo ekuphuculeni umgangatho we-cigarettes kunye nokunciphisa iindleko.
3.6 Izinto zokuthambisa: I-NaCMC idlala indima yokusasaza, ukunqumamisa kunye nokuzinzisa imveliso yentlama yemathiriyeli eqinileyo yentlenga ekrwada, kwaye idlala indima yokuqina, ukusasaza kunye ne-homogenizing kwizinto zolwelo okanye ze-emulsion zokuthambisa.Isenokusetyenziswa njenge-emulsifier, i-thickener kunye ne-stabilizer kwi-ointment kunye ne-shampoo.
I-3.7 Iibhetri: I-NaCMC inobunyulu obuphezulu, i-asidi enhle kunye nokuxhatshazwa kwetyuwa, ngokukodwa isinyithi esiphantsi kunye nomxholo wensimbi enzima, kwaye i-colloid izinzile, ifanelekile kwiibhetri ze-alkaline kunye neebhetri ze-zinc-manganese.
3.8 Ipeyinti esekelwe emanzini: I-HEC kunye ne-MHEC zingasetyenziswa njengezinzisi, izithambiso kunye nee-agent ezigcina amanzi kwiipeyinti ze-latex.Ukongeza, zinokusetyenziswa njenge-dispersants, tackifiers kunye ne-film-forming agents kwiipeyinti zesamente ezinemibala.
3.9 Imathiriyeli yokwakha: ingasetyenziswa njengesixhobo sokuchithachitha, esigcina amanzi kunye nesingqinisiso sokutyabeka kunye nodaka lomaleko ongezantsi wegypsum kunye nomaleko ongezantsi wesamente, kunye nemathiriyeli yokutyabeka emhlabeni.
3.10 Iglaze: Ingasetyenziswa njengento yokuncamathelisa yeglaze.
3.11 Isicoci sokucoca: Sisenokusetyenziswa njenge-arhente echasene nokuncamathelisa ukujiya ubumdaka.
3.12 I-Emulsion dispersion: ingasetyenziswa njenge-stabilizer kunye ne-thickener.
3.13 I-toothpaste: I-NaCMHPC ingasetyenziswa njenge-stabilizer ye-toothpaste adhesives.Uneempawu ezintle ze-thixotropic, okwenza i-toothpaste ibe yinto enhle kwimilo, ixesha elide ngaphandle kwe-deformation, kwaye inokunambitheka okufanayo kunye nobuthathaka.I-NaCMHPC inokumelana netyuwa ephezulu kunye nokumelana ne-asidi, kwaye umphumo wayo uphezulu kakhulu kune-CMC.

4. Isicelo kwiingubo kunye neepastes

I-ether ye-cellulose idlala indima ebaluleke kakhulu kwiingubo kunye neepasti.Yongeza kuphela inani elipheleleyo le-formula O. I-2% ukuya kwi-0.5% inokujiya, igcine amanzi, ithintele ii-pigments kunye nezihluzi ekuzinziseni, kunye nokwandisa ukunamathela kunye namandla okudibanisa.
4.1 I-Viscosity: I-viscosity ye-cellulose ether isisombululo se-aqueous sitshintsha ngamandla e-shear, kunye nepeyinti kunye ne-paste eqiniswe nge-cellulose ether nayo inolu phawu.Ukuze kube lula ukusetyenziswa kwengubo, uhlobo kunye nesixa se-cellulose ether kufuneka sikhethwe ngokucophelela.Kwiingubo, xa usebenzisa i-cellulose ether, iimveliso ze-viscosity eziphakathi zingakhethwa.
4.2 Ukugcinwa kwamanzi: I-ether ye-cellulose inokuthintela umswakama ukuba ungene ngokukhawuleza kwi-substrate ye-porous, ukwenzela ukuba ikwazi ukwenza i-coating efanayo ngexesha lenkqubo yonke yokwakha ngaphandle kokumisa ngokukhawuleza.Xa umxholo we-emulsion uphezulu, imfuno yokugcinwa kwamanzi inokufezekiswa ngokusebenzisa i-cellulose ether encinci.Ukugcinwa kwamanzi kwiipende kunye ne-slurries kuxhomekeke ekugxininiseni kwe-cellulose ether kunye nokushisa kwe-substrate edibeneyo.
4.3 Ii-pigments ezizinzileyo kunye nezihluzi: Ii-pigments kunye nezihluzi zikholisa ukugcwala.Ukugcina umfaniswano wepeyinti kwaye uzinzile, iifayili ze-pigment kufuneka zibe kwimeko emisiwe.Ukusetyenziswa kwe-cellulose ether kunokwenza ipeyinti ibe ne-viscosity ethile, kwaye akukho mvula iya kwenzeka ngexesha lokugcina.
4.4 Ukubambelela kunye namandla okudibanisa: Ngenxa yokugcinwa kakuhle kwamanzi kunye nokunamathela kwe-cellulose ether, ukunamathela kakuhle phakathi kokutya kunye ne-substrate kunokuqinisekiswa.I-MHEC kunye ne-NaCMC ine-adhesion eyomileyo egqwesileyo kunye nokubambelela, ngoko ke zifanelekile ngokukodwa kwi-pulp yephepha, ngelixa i-HEC ayifanelekanga kule njongo.
4.5 Umsebenzi we-colloid okhuselayo: Ngenxa ye-hydrophilicity ye-cellulose ether, ingasetyenziselwa njenge-colloid ekhuselayo yeengubo.
4.6 I-Thickener: I-ether ye-cellulose isetyenziswa ngokubanzi kwipeyinti ye-latex njenge-thickener yokulungelelanisa i-viscosity yokwakha.Phakathi kunye ne-viscosity ephezulu ye-hydroxyethyl cellulose kunye ne-methyl hydroxyethyl cellulose zisetyenziswa kakhulu kwiipende ze-emulsion.Ngamanye amaxesha i-ether ye-cellulose ingasetyenziswa kunye nee-synthetic thickeners (ezifana ne-polyacrylate, i-polyurethane, njl.njl.) ukuphucula iimpawu ezithile zepeyinti ye-latex kunye nokunika ipeyinti ye-latex ukuzinza okufanayo.
I-Cellulose ethers zonke zinokugcinwa kwamanzi okugqwesileyo kunye neempawu zokujiya, kodwa ezinye iipropathi zahlukile.I-Anionic cellulose ether, kulula ukwenza iityuwa ezinganyibilikiyo ngamanzi kunye ne-divalent kunye ne-trivalent cations.Ke ngoko, xa kuthelekiswa ne-methyl hydroxyethyl cellulose kunye ne-hydroxyethyl fiber, i-sodium carboxymethyl cellulose inokumelana nokukhuhla okungalunganga.Ke i-sodium carboxymethyl cellulose ingasetyenziswa kuphela kwimixube yepeyinti ye-latex enexabiso eliphantsi.
I-Methyl hydroxyethyl cellulose kunye ne-methyl hydroxypropyl cellulose zine-shear viscosity esezantsi kunye neempawu eziphezulu ze-surfactant kune-hydroxyethyl cellulose, ngaloo ndlela zinciphisa ukutyekela kwepeyinti ye-latex kwi-splatter.Kwaye i-carboxymethyl cellulose ayinayo i-surfactant effect.
Iselulosi yeHydroxyethyl ineempawu zokungamanzi kakuhle, ukuxhathisa okuphantsi kwebrashi kunye nokwakhiwa lula kwipeyinti yelatex.Xa kuthelekiswa ne-methyl hydroxyethyl kunye ne-methyl hydroxypropyl cellulose, inokuhambelana ngcono kunye ne-pigments, ngoko Kucetyiswa ngepeyinti ye-latex yesilika, ipeyinti ye-latex enemibala, i-color paste, njl.