Kodi Cellulose Ether ndi chiyani?

Imayambitsa kukonzekera kwa cellulose ether, cellulose ether performance ndintchito ya cellulose ether, makamaka ntchito mu zokutira.
Mawu ofunikira: cellulose ether, magwiridwe antchito, kugwiritsa ntchito
Cellulose ndi chilengedwe macromolecular pawiri.Kapangidwe kake kake ndi polysaccharide macromolecule yokhala ndi β-glucose yopanda madzi ngati mphete yoyambira.Pali gulu limodzi loyambirira la hydroxyl ndi magulu awiri achiwiri a hydroxyl pa mphete iliyonse yoyambira.Kupyolera mu kusintha kwake kwa mankhwala, mndandanda wa zotumphukira za cellulose zitha kupezeka, ndipo cellulose ether ndi amodzi mwa iwo.Ma cellulose ethers amagwiritsidwa ntchito kwambiri m'mafakitale ambiri.

1.Kukonzekera

Cellulose ether ndi akamagwira anachita mapadi ndi NaOH, ndiye anachita ndi monomers zosiyanasiyana zinchito monga monochloromethane, ethylene okusayidi, propylene okusayidi, etc., ndi kutsuka ndi mankhwala mchere ndi mapadi sodium.

2.Kuchita

2.1 Maonekedwe: Cellulose ether ndi yoyera kapena yamkaka yoyera, yopanda fungo, yopanda poizoni, ufa wa fibrous ndi fluidity, yosavuta kuyamwa chinyezi, ndipo umasungunuka kukhala colloid yowonekera bwino ya viscous khola m'madzi.
2.2 Ionicity: MC, MHEC, MHPC, HEC ndi nonionic;NaCMC, NaCMHEC ndi anionic.
2.3 Etherification: Makhalidwe ndi digiri ya etherification ya etherification idzakhudza ntchito ya cellulose ether panthawi ya etherification, monga kusungunuka, kupanga mafilimu, mphamvu zomangira ndi kukana mchere.
2.4 Solubility: (1) MC imasungunuka m'madzi ozizira, osasungunuka m'madzi otentha, komanso imasungunuka m'madzi ena;MHEC imasungunuka m'madzi ozizira, osasungunuka m'madzi otentha ndi organic solvents.Komabe, njira yamadzi ya MC ndi MHEC ikatenthedwa, MC ndi MHEC zidzagwa.MC imatentha pa 45-60 ° C, pamene kutentha kwa mvula ya MHEC yosakanikirana kumakwera kufika pa 65-80 ° C.Kutenthako kukatsitsidwa, mpweyawo umasungunukanso.(2) HEC, NaCMC, ndi NaCMHEC amasungunuka m'madzi pa kutentha kulikonse, koma osasungunuka mu zosungunulira za organic (kupatulapo zochepa).
2.5 Kuchedwa kutupa: Cellulose ether imakhala ndi kutupa kwina kochedwa m'madzi a pH osalowerera, koma imatha kuthana ndi kutupa komweku kwachedwa m'madzi amchere a pH.
2.6 Viscosity: Ma cellulose ether amasungunuka m'madzi ngati colloid, ndipo kukhuthala kwake kumadalira kuchuluka kwa polymerization ya cellulose ether.The yankho lili hydrated macromolecules.Chifukwa cha kutsekeka kwa ma macromolecules, machitidwe otaya mayankho amasiyana ndi a Newtonian fluid, koma amawonetsa machitidwe omwe amasintha ndi kukameta ubweya.Chifukwa cha mawonekedwe a macromolecular a cellulose ether, kukhuthala kwa yankho kumawonjezeka kwambiri ndikuwonjezeka kwa ndende ndikucheperako mwachangu ndi kuwonjezeka kwa kutentha.
2.7 Kukhazikika kwachilengedwe: Cellulose ether imagwiritsidwa ntchito mu gawo lamadzi.Malingana ngati madzi alipo, mabakiteriya amakula.Kukula kwa mabakiteriya kumabweretsa kupanga ma enzyme bacteria.Enzymeyi imathyola zomangira za unit ya anhydroglucose zomwe sizinalowe m'malo moyandikana ndi cellulose ether, ndikuchepetsa kulemera kwa ma polima.Chifukwa chake, ngati njira yamadzimadzi ya cellulose ether iyenera kusungidwa kwa nthawi yayitali, chosungira chiyenera kuwonjezeredwa kwa icho.Izi ndi zoona ngakhale ndi antimicrobial cellulose ethers.

3. Cholinga

3.1 Oilfield: NaCMC imagwiritsidwa ntchito kwambiri popangira mafuta, ndipo imagwiritsidwa ntchito popanga matope kuti iwonjezere kukhuthala komanso kuchepetsa kutaya madzi.Imatha kukana kuipitsidwa kwa mchere wambiri wosungunuka ndikuwongolera kuchira kwamafuta.Sodium carboxymethyl hydroxypropyl mapadi ndi sodium carboxymethyl hydroxyethyl mapadi ndi zabwino kubowola matope mankhwala othandizira ndi zipangizo pokonzekera madzi amalizitsa, ndi mkulu pulping mlingo, wabwino mchere ndi kashiamu kukana, Iwo ali ndi mphamvu zabwino mamasukidwe akayendedwe-kuchuluka ndi kutentha kukana (160 ° C).Ndizoyenera kukonzekera madzi omaliza amadzi abwino, madzi a m'nyanja ndi madzi amchere odzaza.Itha kupangidwa kuti ikhale yamadzimadzi amitundu yosiyanasiyana (1.03-1.279 / Cm3) pansi pa kulemera kwa calcium chloride, ndipo imakhala ndi kukhuthala kwina.Ndipo kutsika kwamadzimadzi kutsika, kukhuthala kwake kuchulukirachulukira komanso kuchepa kwamadzimadzi kumachepetsa mphamvu kuposa hydroxyethyl cellulose, ndizowonjezera zabwino pakuwonjezera kupanga mafuta.
3.2 Zomangira zadothi: NaCMC itha kugwiritsidwa ntchito ngati retarder, chosungira madzi, thickener ndi binder, kuti zinthu zopangidwa ndi ceramic zikhale ndi mawonekedwe abwino komanso opanda chilema ndi thovu.
3.3 Kupanga Mapepala: NaCMC imagwiritsidwa ntchito poyesa mkati ndi kunja ndikudzaza ndi kusunga pepala pamwamba, ndipo imatha kulowetsa casein, kuti inki yosindikizira ilowemo mosavuta komanso m'mbali mwake mumveke bwino.Pakupanga mapepala, itha kugwiritsidwa ntchito ngati dispersant pigment, tackifier, stabilizer ndi sizing agent.
3.4 Zovala: NaCMC imagwiritsidwa ntchito m'malo mwa tirigu ndi kukula kwake m'makampani opanga nsalu, ndipo sikophweka kuti iwonongeke ndikukhala nkhungu.Pamene kusindikiza ndi utoto, sipafunika desizing, ndipo utoto akhoza kupeza yunifolomu colloid m'madzi, amene kumawonjezera hydrophilicity ndi malowedwe a utoto.Pa nthawi yomweyi, chifukwa cha kusintha kwakung'ono kwa mamasukidwe akayendedwe, n'zosavuta kusintha kusiyana kwa mtundu.CMHEC imagwiritsidwa ntchito ngati thickener kusindikiza ndi utoto zamkati, ndi zotsalira zing'onozing'ono ndi zokolola zamitundu yambiri, ndipo khalidwe losindikiza ndi lopaka utoto ndilopamwamba kwambiri kuposa mankhwala ake a ionic ndi osakhala a ionic cellulose ether.
3.5 Fodya: NaCMC imagwiritsidwa ntchito polumikiza fodya.Imasungunuka mwamsanga ndipo imakhala ndi mphamvu zomangirira mwamphamvu, zomwe zimapindulitsa kupititsa patsogolo khalidwe la ndudu ndi kuchepetsa ndalama.
3.6 Zodzoladzola: NaCMC imagwira ntchito yomwaza, kuyimitsa ndi kukhazikika kwa phala la zinthu zolimba za silty, ndipo imagwira ntchito yokulitsa, kufalitsa ndi kutulutsa homogenizing muzodzola zamadzimadzi kapena emulsion.Itha kugwiritsidwanso ntchito ngati emulsifier, thickener ndi stabilizer yamafuta opaka ndi shampu.
Mabatire a 3.7: NaCMC ili ndi chiyero chachikulu, asidi wabwino ndi kukana mchere, makamaka chitsulo chochepa ndi zitsulo zolemera kwambiri, ndipo colloid ndi yokhazikika, yoyenera mabatire a alkaline ndi mabatire a zinc-manganese.
3.8 Utoto wokhala ndi madzi: HEC ndi MHEC zitha kugwiritsidwa ntchito ngati zokhazikika, zokhuthala ndi zosunga madzi pa utoto wa latex.Kuphatikiza apo, atha kugwiritsidwanso ntchito ngati dispersants, tackifiers ndi opanga mafilimu opanga utoto wa simenti.
3.9 Zipangizo zomangira: zitha kugwiritsidwa ntchito ngati dispersant, madzi posungira ndi thickener po pulasitala ndi matope pansi gypsum wosanjikiza ndi simenti pansi wosanjikiza, ndi pansi pulasitala zipangizo.
3.10 Glaze: Itha kugwiritsidwa ntchito ngati zomatira za glaze.
3.11 Detergent: Itha kugwiritsidwa ntchito ngati anti-adhesion agent pakukulitsa dothi.
3.12 Emulsion kubalalitsidwa: itha kugwiritsidwa ntchito ngati stabilizer ndi thickener.
3.13 Mankhwala otsukira m'mano: NaCMHPC itha kugwiritsidwa ntchito ngati chokhazikika cha zomatira zotsukira mkamwa.Lili ndi katundu wabwino wa thixotropic, kupanga mankhwala otsukira mano kukhala abwino, otalika popanda mapindikidwe, ndipo amakhala ndi kukoma kofanana ndi kosakhwima.NaCMHPC ili ndi kukana kwa mchere wapamwamba komanso kukana kwa asidi, ndipo zotsatira zake ndizopambana kwambiri kuposa za CMC.

4. Kugwiritsa ntchito zokutira ndi phala

Cellulose ether imagwira ntchito yofunika kwambiri pakupaka ndi phala.Ingowonjezerani chiwerengero chonse cha formula O. 2% mpaka 0.5% imatha kukhuthala, kusunga madzi, kuteteza ma pigment ndi fillers kuti asakhazikike, ndikuwonjezera kumamatira ndi mphamvu zomangirira.
4.1 Viscosity: The viscosity ya cellulose ether solution yamadzimadzi imasintha ndi kukameta ubweya wa ubweya, ndipo utoto ndi phala wokhuthala ndi cellulose ether zilinso ndi izi.Kuti muzitha kugwiritsa ntchito chophimbacho, mtundu ndi kuchuluka kwa cellulose ether ziyenera kusankhidwa mosamala.Kwa zokutira, mukamagwiritsa ntchito cellulose ether, zinthu zapakatikati za viscosity zitha kusankhidwa.
4.2 Kusungirako madzi: Cellulose ether ingalepheretse chinyezi kuti chisalowe mofulumira mu gawo lapansi la porous, kotero kuti likhoza kupanga chophimba chofanana panthawi yonse yomanga popanda kuumitsa mwamsanga.Pamene zili mu emulsion ndi mkulu, kufunikira kwa kusunga madzi kungakwaniritsidwe pogwiritsa ntchito cellulose ether yochepa.Kusungidwa kwamadzi kwa utoto ndi slurries kumadalira kuchuluka kwa cellulose ether ndi kutentha kwa gawo lapansi lophimbidwa.
4.3 Ma pigment okhazikika ndi zodzaza: Nkhumba ndi zodzaza zimakonda kugwa.Kuti yunifolomu ya utoto ikhale yosasunthika, zodzaza pigment ziyenera kukhala zoyimitsidwa.Kugwiritsiridwa ntchito kwa cellulose ether kungapangitse utoto kukhala ndi viscosity, ndipo palibe mvula yomwe idzachitika panthawi yosungira.
4.4 Kumamatira ndi mphamvu yomangirira: Chifukwa cha kusungirako bwino kwa madzi ndi kumamatira kwa cellulose ether, kumamatira kwabwino pakati pa zokutira ndi gawo lapansi kumatha kutsimikizika.MHEC ndi NaCMC ali ndi zowuma zowuma bwino komanso zomatira, motero ndizoyenera kwambiri pazamkati zamapepala, pomwe HEC siyiyenera kuchita izi.
4.5 Chitetezo cha colloid ntchito: Chifukwa cha hydrophilicity ya cellulose ether, ingagwiritsidwe ntchito ngati colloid yotetezera yophimba.
4.6 Thickener: Cellulose ether imagwiritsidwa ntchito kwambiri mu utoto wa latex ngati thickener kusintha kukhuthala kwa zomangamanga.Sing'anga ndi mkulu mamasukidwe akayendedwe hydroxyethyl mapadi ndi methyl hydroxyethyl mapadi ntchito makamaka ntchito emulsion utoto.Nthawi zina ether ya cellulose itha kugwiritsidwanso ntchito limodzi ndi zopangira zopangira (monga polyacrylate, polyurethane, ndi zina) kuti apititse patsogolo zinthu zina za utoto wa latex ndikupangitsa kuti utoto wa latex ukhale wokhazikika.
Ma cellulose ethers onse ali ndi bwino kusunga madzi komanso kukhuthala, koma zinthu zina ndizosiyana.Anionic cellulose ether, yosavuta kupanga mchere wosasungunuka m'madzi wokhala ndi ma divalent ndi trivalent cations.Chifukwa chake, poyerekeza ndi methyl hydroxyethyl cellulose ndi hydroxyethyl fiber, sodium carboxymethyl cellulose imakhala yosakanizidwa bwino ndi scrub.Chifukwa chake sodium carboxymethyl cellulose ingagwiritsidwe ntchito pakupanga utoto wotchipa wa latex.
Methyl hydroxyethyl cellulose ndi methyl hydroxypropyl cellulose ali ndi mawonekedwe otsika ometa ubweya komanso okwera kwambiri kuposa hydroxyethyl cellulose, motero amachepetsa chizolowezi cha utoto wa latex kuti splatter.Ndipo carboxymethyl cellulose ilibe surfactant effect.
Ma cellulose a Hydroxyethyl ali ndi mawonekedwe amadzimadzi abwino, kukana kutsukira pang'ono komanso kupanga kosavuta mu utoto wa latex.Poyerekeza ndi methyl hydroxyethyl ndi methyl hydroxypropyl cellulose, imakhala yogwirizana bwino ndi inki, motero Ndikulimbikitsidwa kuti pakhale utoto wa lalabala wa silika, utoto wamtundu wa latex, phala lamtundu, ndi zina zambiri.