Mwachidule
Cellulose ndi polima wachilengedwe wopangidwa ndi mayunitsi a β-glukosi a anhydrous, ndipo ali ndi magulu atatu a hydroxyl pa mphete iliyonse yoyambira.Posintha mankhwala a cellulose, mitundu yosiyanasiyana ya cellulose imatha kupangidwa, ndipo imodzi mwazo ndi cellulose ether.Ma cellulose ether ndi gulu la polima lomwe lili ndi ether yochokera ku cellulose, kuphatikiza methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, ndi ena.Izi zotumphukira nthawi zambiri amapangidwa pochita ma cellulose amchere ndi monochloroalkane, ethylene oxide, propylene oxide, kapena monochloroacetic acid.Chotsatira chake cha cellulose ether chimakhala ndi kusungunuka kwamadzi, kukhuthala, komanso kupanga mafilimu, ndipo chimagwiritsidwa ntchito kwambiri m'mafakitale monga zomangamanga, zamankhwala, chakudya, ndi zodzola.Cellulose ether ndi chinthu chongowonjezedwanso, chowola, komanso chosakhala poizoni, ndikupangitsa kuti chikhale chotchuka m'malo mwa ma polima opangira.
Magwiridwe ndi Mawonekedwe
1. Mawonekedwe a Mawonekedwe
Cellulose ether ndi ufa woyera, wopanda fungo, wonyezimira womwe umayamwa mosavuta chinyezi ndikupanga colloid yokhazikika, yowoneka bwino, yowonekera ikasungunuka m'madzi.
2. Kupanga Mafilimu ndi Kumamatira
Kusintha kwa mankhwala a cellulose kuti apange cellulose ether kumakhudza kwambiri katundu wake, kuphatikiza kusungunuka kwake, luso lopanga filimu, kulimba kwa mgwirizano, ndi kukana mchere.Makhalidwewa amapangitsa cellulose ether kukhala polima wofunika kwambiri wokhala ndi mphamvu zamakina, kusinthasintha, kukana kutentha, komanso kuzizira.Kuphatikiza apo, imawonetsa kuyanjana bwino ndi ma resin osiyanasiyana ndi mapulasitiki, ndikupangitsa kuti ikhale yoyenera kugwiritsidwa ntchito popanga mapulasitiki, mafilimu, ma vanishi, zomatira, latex, ndi zida zokutira mankhwala.Chifukwa cha zinthu zake zambiri, cellulose ether yakhala chinthu chofunikira kwambiri pamakampani opanga zinthu, kupereka magwiridwe antchito, kukhazikika, komanso kukhazikika kwazinthu zambiri.Zotsatira zake, ili ndi ntchito zambiri m'magawo osiyanasiyana, kuphatikiza mankhwala, zokutira, nsalu, zomangamanga, ndi mafakitale azakudya, pakati pa ena.
3. Kusungunuka
Kusungunuka kwa ma cellulose ethers monga methylcellulose, methyl hydroxyethyl cellulose, hydroxyethyl cellulose, ndi sodium carboxymethyl hydroxyethyl cellulose zimasiyana malinga ndi kutentha ndi zosungunulira zomwe zimagwiritsidwa ntchito.Methylcellulose ndi methyl hydroxyethyl mapadi amasungunuka m'madzi ozizira ndi zosungunulira zina za organic koma zimatuluka zikatenthedwa, ndi methylcellulose precipitating pa 45-60 ° C ndi etherified methyl hydroxyethyl cellulose pa 65-80 ° C.Komabe, madziwo amatha kusungunukanso kutentha kwatsika.Kumbali ina, hydroxyethyl cellulose ndi sodium carboxymethyl hydroxyethyl cellulose ndi madzi sungunuka pa kutentha kulikonse koma osasungunuka mu zosungunulira organic.Ma cellulose ethers amakhala ndi kusungunuka kosiyanasiyana komanso mvula zomwe zimawapangitsa kukhala oyenera kugwiritsidwa ntchito mosiyanasiyana m'mafakitale monga mapulasitiki, mafilimu, zokutira, ndi zomatira.
4. Kukhuthala
Pamene mapadi ether amasungunuka m'madzi, amapanga njira ya colloidal yomwe kukhuthala kwake kumakhudzidwa ndi kuchuluka kwa polymerization ya cellulose ether.Yankho lake lili ndi ma hydrated macromolecules omwe amawonetsa machitidwe omwe si a Newtonian, mwachitsanzo, machitidwe oyenda amasintha ndi mphamvu yakumeta ubweya yomwe imagwiritsidwa ntchito.Chifukwa cha mawonekedwe a macromolecular, kukhuthala kwa yankho kumawonjezeka mwachangu ndi ndende, koma kumachepetsa mwachangu ndikuwonjezeka kwa kutentha.Kukhuthala kwa ma cellulose ether solution kumakhudzidwanso ndi pH, mphamvu ya ionic, komanso kupezeka kwa mankhwala ena.Izi zapadera za cellulose ether zimapangitsa kuti zikhale zothandiza pazinthu zosiyanasiyana monga zomatira, zokutira, zodzoladzola, ndi zakudya.
Kugwiritsa ntchito
1. Makampani a Mafuta
Sodium carboxymethyl cellulose (NaCMC) ndi cellulose ether yokhala ndi ntchito zosiyanasiyana pakuchotsa mafuta.Ubwino wake wowonjezera kukhuthala komanso kuchepetsa kutayika kwamadzimadzi zimapangitsa kukhala chisankho chodziwika bwino mumadzimadzi obowola, madzimadzi opangira simenti, ndi madzi ophwanyika.Makamaka, zawonetsa zotsatira zabwino pakuwongolera kuchira kwamafuta.NaCMC imatha kukana kuipitsidwa kwa mchere wambiri wosungunuka ndikuwonjezera kuchira kwamafuta pochepetsa kutayika kwa madzi, ndipo kukana kwake mchere komanso kukulitsa kukhathamiritsa kwamphamvu kumapangitsa kuti ikhale yabwino pokonzekera madzi obowola madzi abwino, madzi am'nyanja, ndi madzi amchere odzaza.
Sodium carboxymethyl hydroxypropyl cellulose (NaCMHPC) ndi sodium carboxymethyl hydroxyethyl cellulose (NaCMHEC) ndi zotuluka ziwiri za cellulose ether zomwe zimakhala ndi slurrying rate, ntchito yabwino ya anti-calcium, komanso luso lowonjezera kukhuthala, kuwapanga kukhala zisankho zabwino kwambiri zopangira pobowola matope ndi zida. kukonzekera madzi omaliza.Amawonetsa kukhathamira kwamphamvu kwambiri komanso kuchepa kwamadzimadzi kutsika poyerekeza ndi hydroxyethyl cellulose, ndipo kuthekera kwawo kupangidwa kukhala madzi obowola osiyanasiyana olemera a calcium chloride kumawapangitsa kukhala chowonjezera chosunthika pakuwonjezera kupanga mafuta.
Hydroxyethyl cellulose (HEC) ndi chinthu china chochokera ku cellulose chomwe chimagwiritsidwa ntchito ngati matope okhuthala komanso okhazikika pobowola, kumaliza, ndi kumanga simenti.Poyerekeza ndi sodium carboxymethyl cellulose ndi guar chingamu, HEC ili ndi kuyimitsidwa kwa mchenga wolimba, kuchuluka kwa mchere wambiri, kukana kutentha kwabwino, kukana kusakanikirana kochepa, kutayika kwamadzi pang'ono, komanso kusweka kwa gel.HEC yakhala ikugwiritsidwa ntchito kwambiri chifukwa cha kukhuthala kwake, zotsalira zochepa, ndi zina.Ponseponse, ma cellulose ethers monga NaCMC, NaCMHPC, NaCMHEC, ndi HEC amagwira ntchito yofunika kwambiri pakuchotsa mafuta ndipo awonetsa kuthekera kwakukulu pakuwongolera kuchira kwamafuta.
2. Makampani Omanga ndi Paint
Sodium carboxymethyl cellulose ndi zowonjezera zomangira zomwe zitha kugwiritsidwa ntchito ngati retarder, chosungira madzi, thickener ndi binder pomanga zomangira ndi pulasitala matope.Itha kugwiritsidwanso ntchito ngati dispersant, madzi kusunga wothandizila ndi thickener kwa pulasitala, matope ndi nthaka kusanja zipangizo.Kuphatikizika kwapadera kwa matope ndi pulasitala wopangidwa ndi carboxymethyl cellulose kumatha kupititsa patsogolo magwiridwe antchito, kusunga madzi komanso kukana ming'alu, kupewa kusweka ndi kuphulika pakhoma la block.Kuphatikiza apo, ma cellulose a methyl angagwiritsidwe ntchito popanga zida zokometsera zokometsera zokometsera pakhoma lapamwamba komanso pamiyala yamwala, komanso kukongoletsa pamwamba pazipilala ndi zipilala.
3. Daily Chemical Viwanda
Sodium carboxymethyl cellulose ndi viscosifier yokhazikika yosunthika yomwe ingagwiritsidwe ntchito pazinthu zosiyanasiyana.Mu phala mankhwala okhala olimba ufa zopangira, ndi mbali yofunika kubalalitsidwa ndi kuyimitsidwa bata.Kwa zodzoladzola zamadzimadzi kapena emulsion, zimagwira ntchito ngati thickening, dispersing, ndi homogenizing wothandizira.Chochokera ku cellulose ichi chingathenso kukhala ngati emulsion stabilizer, mafuta odzola ndi shampoo thickener ndi stabilizer, mankhwala otsukira mano zomatira stabilizer, ndi detergent thickener ndi anti-stain agent.Sodium carboxymethyl hydroxypropyl cellulose, mtundu wa cellulose ether, amagwiritsidwa ntchito kwambiri ngati mankhwala otsukira mano okhazikika chifukwa cha thixotropic, zomwe zimathandiza kusunga mawonekedwe otsukira mano komanso kusasinthasintha.Chochokera kumtunduwu sichimvanso mchere ndi asidi, zomwe zimapangitsa kuti zikhale zokhuthala bwino mu zotsukira ndi anti-stain agents.Sodium carboxymethyl cellulose imagwiritsidwa ntchito ngati dispersant dothi, thickener, ndi dispersant popanga kutsuka ufa ndi zotsukira madzi.
4. Makampani a Mankhwala ndi Chakudya
M’makampani opanga mankhwala, Yibang hydroxypropyl carboxymethylcellulose (HPMC) amagwiritsidwa ntchito kwambiri ngati mankhwala opangira mankhwala oletsa kutulutsa mkamwa komanso kukonzekera kosalekeza.Zimakhala ngati kumasulidwa retarding zinthu kulamulira kumasulidwa kwa mankhwala, ndi ❖ kuyanika zinthu kuchedwetsa amasulidwe formulations.Methyl carboxymethyl cellulose ndi ethyl carboxymethyl cellulose amagwiritsidwa ntchito popanga mapiritsi ndi makapisozi, kapena kuvala mapiritsi okhala ndi shuga.M'makampani azakudya, ma premium grade cellulose ethers ndi okhuthala bwino, okhazikika, othandizira, osungira madzi ndi opangira thovu pamakina osiyanasiyana.Methylcellulose ndi hydroxypropylmethylcellulose amaonedwa kuti ndi inert ndipo ndi otetezeka kuti amwe.Carboxymethylcellulose yoyera kwambiri imatha kuwonjezeredwa kuzinthu zazakudya, kuphatikiza mkaka ndi zonona, zokometsera, jamu, odzola, zakudya zamzitini, madzi a tebulo, ndi zakumwa.Kuphatikiza apo, carboxymethyl cellulose imatha kugwiritsidwa ntchito ponyamula ndi kusungira zipatso zatsopano ngati zokutira pulasitiki, zomwe zimapangitsa kuti zisungidwe bwino, kuwononga pang'ono, kusawonongeka, komanso kupanga makina osavuta.
5. Zida Zogwiritsira Ntchito Optical ndi Magetsi
The high-purity cellulose ether yokhala ndi asidi wabwino ndi kukana mchere imakhala ngati electrolyte thickening stabilizer, kupereka mphamvu zokhazikika za colloidal zamabatire amchere ndi zinc-manganese.Ma cellulose ether ena amawonetsa kuwala kwamadzi a thermotropic, monga hydroxypropyl cellulose acetate, yomwe imapanga makristalo amadzimadzi a cholesteric pansi pa 164°C.
Main Reference
● Dictionary of Chemical Substances.
● Makhalidwe, kukonzekera ndi kugwiritsira ntchito mafakitale a cellulose ether.
● Zomwe Zilipo ndi Kusintha kwa Msika wa Cellulose Ether.
