Hydroxyethyl Cellulose Physical and Chemical Properties
Maonekedwe a katundu Mankhwalawa ndi oyera mpaka kuwala chikasu ulusi kapena powdery olimba, si poizoni ndi zoipa
Malo osungunuka 288-290 °C (dec.)
Kachulukidwe 0.75 g/mL pa 25 °C(lit.)
Kusungunuka Kusungunuka m'madzi. Insoluble mu wamba organic solvents. Imasungunuka m'madzi ozizira ndi madzi otentha, ndipo nthawi zambiri imasungunuka m'madzi ambiri osungunulira. Kukhuthala kumasintha pang'ono mumtundu wa PH mtengo 2-12, koma kukhuthala kumachepera kuposa izi. Lili ndi ntchito za thickening, kuyimitsa, kumanga, emulsifying, kubalalitsa, ndi kusunga chinyezi. Mayankho osiyanasiyana mamasukidwe akayendedwe osiyanasiyana akhoza kukonzekera. Ili ndi kusungunuka kwabwino kwa mchere kwa ma electrolyte.
Monga si ionic surfactant, hydroxyethyl cellulose ili ndi zinthu zotsatirazi kuwonjezera pa kukhuthala, kuyimitsa, kumanga, kuyandama, kupanga mafilimu, kubalalitsa, kusunga madzi ndi kupereka colloids zoteteza:
1. HEC imasungunuka m'madzi otentha kapena madzi ozizira, kutentha kwakukulu kapena kuwira popanda mvula, kotero kuti imakhala ndi mitundu yambiri ya solubility ndi viscosity, ndi gelation yopanda kutentha;
2. Siionic ndipo imatha kukhala limodzi ndi ma polima ena osungunuka m'madzi, ma surfactants, ndi mchere. Ndibwino kwambiri colloidal thickener kwa high-concentration electrolyte solutions;
3. Mphamvu yosungira madzi imakhala yowirikiza kawiri kuposa ya methyl cellulose, ndipo imakhala ndi malamulo oyendetsera bwino.
4. Poyerekeza ndi methyl cellulose yodziwika bwino ndi hydroxypropyl methyl cellulose, mphamvu yobalalika ya HEC ndiyoipa kwambiri, koma mphamvu yoteteza colloid ndiyo yamphamvu kwambiri.
Zofunikira zaukadaulo ndi miyezo yapamwamba ya hydroxyethyl cellulose
Zinthu: Index molar substitution (MS) 2.0-2.5 Chinyezi (%) ≤5 Madzi osasungunuka (%) ≤0.5 PH mtengo 6.0-8.5 Heavy metal (ug / g) ≤20 Phulusa (%) ≤5 Viscosity (mpa. s) 2% 20 ℃ njira yamadzimadzi 5-60000 kutsogolera (%) ≤0.001
Kugwiritsa ntchito hydroxyethyl cellulose
【Gwiritsani ntchito 1】 Imagwiritsidwa ntchito ngati surfactant, latex thickener, colloidal protective agent, mafuta ofufuza fracturing fluid, polystyrene ndi polyvinyl chloride dispersant, etc.
[Gwiritsani ntchito 2] Imagwiritsidwa ntchito ngati chowonjezera komanso chochepetsera kutaya madzimadzi pobowola madzi ndi madzi omaliza, ndipo imakhala ndi zotsatira zowoneka bwino zamadzimadzi obowola brine. Itha kugwiritsidwanso ntchito ngati chochepetsera kutaya madzi kwa simenti yamafuta bwino. Itha kulumikizidwa ndi ayoni azitsulo a polyvalent kuti apange gel.
[Gwiritsani ntchito 3] Mankhwalawa amagwiritsidwa ntchito ngati dispersant polymeric kwa madzi opangidwa ndi gel fracturing fluid, polystyrene ndi polyvinyl chloride mu migodi ya fracturing. Itha kugwiritsidwanso ntchito ngati emulsion thickener mumakampani opanga utoto, hygrostat mumakampani amagetsi, anticoagulant ya simenti ndi chosungira chinyezi pantchito yomanga. Ceramic industry glazing ndi mankhwala otsukira mano binder. Amagwiritsidwanso ntchito kwambiri posindikiza ndi kudaya, nsalu, kupanga mapepala, mankhwala, ukhondo, chakudya, ndudu, mankhwala ophera tizilombo ndi zozimitsa moto.
[Gwiritsani ntchito 4] Amagwiritsidwa ntchito ngati surfactant, colloidal protective agent, emulsification stabilizer ya vinyl chloride, vinyl acetate ndi emulsions ena, komanso viscosifier, dispersant, ndi dispersion stabilizer ya latex. Amagwiritsidwa ntchito kwambiri popaka, ulusi, utoto, kupanga mapepala, zodzoladzola, mankhwala, mankhwala ophera tizilombo, ndi zina zotero. Lilinso ndi ntchito zambiri pofufuza mafuta ndi makampani opanga makina.
【Gwiritsani ntchito 5】 Hydroxyethyl cellulose imakhala ndi ntchito zapamtunda, kukhuthala, kuyimitsa, kumanga, kumanga, kupanga mafilimu, kubalalitsa, kusunga madzi ndikupereka chitetezo pakupanga mankhwala olimba komanso amadzimadzi.
Kugwiritsa ntchito hydroxyethyl cellulose
Amagwiritsidwa ntchito mu zokutira zomangamanga, zodzoladzola, otsukira mano, surfactants, latex thickeners, colloidal zoteteza, mafuta fracturing madzi, polystyrene ndi polyvinyl kolorayidi dispersants, etc.
Hydroxyethyl Cellulose Material Safety Data Sheet (MSDS)
1. Mankhwalawa ali ndi chiopsezo cha kuphulika kwa fumbi. Pogwira zochulukira kapena zochuluka, samalani kuti mupewe kuyika fumbi ndi kuyimitsidwa mumlengalenga, ndipo pewani kutentha, moto, malawi ndi magetsi osasunthika. 2. Pewani ufa wa methylcellulose kuti usalowe ndi kukhudza maso, ndipo valani masks osefera ndi magalasi otetezera pamene mukugwira ntchito. 3. Mankhwalawa ndi oterera kwambiri akamanyowa, ndipo ufa wa methylcellulose wotayika uyenera kutsukidwa nthawi yake ndipo mankhwala oletsa kutsekemera ayenera kuchitidwa.
Kusungirako ndi kayendedwe ka hydroxyethyl cellulose
Kulongedza: matumba awiri wosanjikiza, thumba lakunja lopangidwa ndi pepala, thumba lamkati la filimu ya polyethylene, kulemera kwa ukonde 20kg kapena 25kg pa thumba.
Kusungirako ndi zoyendera: Sungani pamalo opanda mpweya wabwino komanso wouma m’nyumba, ndipo samalani ndi chinyezi. Kuteteza mvula ndi dzuwa panthawi yoyendetsa.
Kukonzekera njira ya hydroxyethyl mapadi
Njira 1: Zilowerereni ma linter a thonje aiwisi kapena zamkati zoyengedwa mu 30% lye, zitulutseni pakatha theka la ola, ndikusindikiza. Kanikizani mpaka chiŵerengero cha madzi amchere chifike pa 1:2.8, ndikusunthira ku chipangizo chophwanyira. Ikani ulusi wosweka wa alkali mu ketulo yochitira. Amasindikizidwa ndikusamutsidwa, odzazidwa ndi nayitrogeni. Mukasintha mpweya mu ketulo ndi nayitrogeni, kanikizani mu precooled ethylene oxide madzi. Yankhani pozizira pa 25°C kwa maola awiri kuti mupeze hydroxyethyl cellulose. Tsukani zinthu zopanda pake ndi mowa ndikusintha pH kukhala 4-6 powonjezera asidi. Onjezani glyoxal yolumikizirana ndi kukalamba, sambani mwachangu ndi madzi, ndipo pamapeto pake centrifuge, youma, ndikupera kuti mupeze mchere wochepa wa hydroxyethyl cellulose.
Njira 2: Alkali cellulose ndi polima zachilengedwe, mphete iliyonse ya fiber base ili ndi magulu atatu a hydroxyl, gulu logwira ntchito kwambiri la hydroxyl limachita kupanga hydroxyethyl cellulose. Zilowerereni ma linter a thonje aiwisi kapena zamkati woyengedwa mu 30% wamadzimadzi a caustic soda, chotsani ndikusindikiza pakatha theka la ola. Finyani mpaka chiŵerengero cha madzi amchere chifike pa 1: 2.8, ndiye kuphwanya. Ikani pulverized alkali cellulose mu zimene ketulo, kusindikiza izo, vacuumize izo, mudzaze ndi asafe, ndi kubwereza vacuumization ndi nayitrogeni kudzazidwa kwathunthu m'malo mpweya mu ketulo. Kanikizani mumadzi oziziritsidwa kale a ethylene oxide, ikani madzi ozizira mu jekete la ketulo, ndikuwongolera zomwe zimachitika pafupifupi 25 ° C kwa maola awiri kuti mupeze hydroxyethyl cellulose. Zopangira zopanda pake zimatsukidwa ndi mowa, osasunthika mpaka pH 4-6 powonjezera acetic acid, ndikulumikizidwa ndi glyoxal pakukalamba. Kenako imatsukidwa ndi madzi, imatsitsidwa ndi centrifugation, zouma ndi kupukutidwa kuti mupeze hydroxyethyl cellulose. Kumwa zopangira (kg/t) thonje linters kapena zamkati otsika 730-780 madzi caustic koloko (30%) 2400 ethylene okusayidi 900 mowa (95%) 4500 acetic asidi 240 glyoxal (40%) 100-300
Hydroxyethyl cellulose ndi ufa woyera kapena wachikasu wopanda fungo, wosakoma komanso wosavuta kuyenda, wosungunuka m'madzi ozizira ndi madzi otentha, osasungunuka m'madzi ambiri osungunulira.
Hydroxyethyl cellulose (HEC) ndi yoyera kapena yopepuka yachikasu, yopanda fungo, yopanda poizoni kapena yolimba, yomwe imakonzedwa ndi etherification ya alkaline cellulose ndi ethylene oxide (kapena chlorohydrin). Nonionic soluble cellulose ethers. Chifukwa HEC ili ndi katundu wabwino wa thickening, kuyimitsa, kubalalika, emulsifying, kugwirizana, kupanga mafilimu, kuteteza chinyezi ndi kupereka colloid zoteteza, zakhala zikugwiritsidwa ntchito kwambiri pofufuza mafuta, zokutira, zomangamanga, mankhwala, chakudya, nsalu, mapepala ndi polima polymerization. ndi minda ina. 40 mauna sieving mlingo ≥ 99%; kutentha kofewa: 135-140 ° C; kachulukidwe kowoneka bwino: 0.35-0.61g/ml; kutentha kwa kuwonongeka: 205-210 ° C; kuthamanga kwapang'onopang'ono; kutentha kwapakati: 23 ° C; 50% 6% pa rh, 29% pa 84% rh.
Momwe mungagwiritsire ntchito hydroxyethyl cellulose
anawonjezera mwachindunji pa nthawi kupanga
1. Thirani madzi oyera pachidebe chachikulu chokhala ndi chosakaniza chometa ubweya wambiri. ndi
Hydroxyethyl cellulose
2. Yambani kusonkhezera mosalekeza pa liwiro lotsika ndikusefa pang'onopang'ono hydroxyethyl cellulose mu yankho mofanana. ndi
3. Pitirizani kusonkhezera mpaka tinthu tating'onoting'ono tanyowa. ndi
4. Kenaka yikani wothandizira mphezi, zowonjezera zowonjezera monga ma pigment, zofalitsa, madzi ammonia. ndi
5. Onetsetsani mpaka cellulose yonse ya hydroxyethyl itasungunuka kwathunthu (kukhuthala kwa yankho kumawonjezeka kwambiri) musanawonjezere zigawo zina mu ndondomeko, ndikupera mpaka mankhwala omalizidwa.
Okonzeka ndi chakumwa cha mayi
Njira iyi ndikukonzekeretsa chakumwa cha mayi ndi mlingo wapamwamba kaye, ndikuwonjezera pa utoto wa latex. Ubwino wa njirayi ndikuti umakhala ndi kusinthasintha kwakukulu ndipo ukhoza kuwonjezeredwa mwachindunji ku utoto womalizidwa, koma uyenera kusungidwa bwino. Masitepewo ndi ofanana ndi Masitepe 1-4 mu Njira 1, kusiyana kwake ndikuti palibe chifukwa chogwedeza mpaka itasungunuka kwathunthu kukhala yankho la viscous.
Porridge kwa phenology
Popeza zosungunulira organic ndi osauka solvents kwa hydroxyethyl mapadi, izi zosungunulira organic angagwiritsidwe ntchito pokonzekera phala. Zosungunulira zomwe zimagwiritsidwa ntchito kwambiri ndi zinthu zamadzimadzi monga ethylene glycol, propylene glycol ndi mafilimu opangira mafilimu (monga ethylene glycol kapena diethylene glycol butyl acetate) popanga utoto. Madzi a ayezi nawonso samasungunuka bwino, motero madzi a ayezi nthawi zambiri amagwiritsidwa ntchito limodzi ndi zakumwa zamadzimadzi pokonzekera phala. Ma cellulose a hydroxyethyl a phala amatha kuwonjezeredwa mwachindunji ku utoto, ndipo cellulose ya hydroxyethyl yagawidwa ndikutupa mu phala. Akawonjezeredwa ku utoto, amasungunuka nthawi yomweyo ndipo amakhala ngati thickener. Pambuyo powonjezera, pitirizani kuyambitsa mpaka hydroxyethyl cellulose itasungunuka kwathunthu ndi yunifolomu. Nthawi zambiri, phala limapangidwa posakaniza magawo asanu ndi limodzi a organic zosungunulira kapena madzi a ayezi ndi gawo limodzi la hydroxyethyl cellulose. Pambuyo pa mphindi 6-30, cellulose ya hydroxyethyl imapangidwa ndi hydrolyzed ndikutupa mwachiwonekere. M'chilimwe, kutentha kwamadzi kumakhala kokwera kwambiri, choncho sikoyenera kugwiritsa ntchito phala.
Chenjezo la hydroxyethyl cellulose
Popeza kuti hydroxyethyl cellulose yopangidwa pamwamba ndi ufa kapena cellulose olimba, n'zosavuta kugwira ndikusungunula m'madzi malinga ngati zinthu zotsatirazi zikuyang'aniridwa. ndi
1. Musanayambe komanso mutatha kuwonjezera hydroxyethyl cellulose, iyenera kugwedezeka mosalekeza mpaka yankho likuwonekera bwino komanso lomveka bwino. ndi
2. Iyenera kusefedwa pang'onopang'ono mu thanki yosakaniza, osawonjezera mwachindunji kuchuluka kwa hydroxyethyl cellulose kapena hydroxyethyl cellulose yomwe yapanga zotupa ndi mipira mu thanki yosakaniza. 3. Kutentha kwa madzi ndi mtengo wa PH m'madzi zimakhala ndi chiyanjano chodziwikiratu ndi kusungunuka kwa cellulose ya hydroxyethyl, kotero chisamaliro chapadera chiyenera kulipidwa. ndi
4. Osawonjezera zinthu za alkaline kusakaniza ufa wa hydroxyethyl cellulose usanatenthedwe m'madzi. Kukweza pH mtengo mutatha kutentha kumathandiza kusungunuka. ndi
5. Momwe mungathere, onjezerani anti-fungal agent mwamsanga momwe mungathere. ndi
6. Mukamagwiritsa ntchito high-viscosity hydroxyethyl cellulose, kuchuluka kwa mowa wa mayi sayenera kupitirira 2.5-3%, apo ayi mowa wa amayi udzakhala wovuta kupirira. Ma cellulose a hydroxyethyl pambuyo pothiridwa nthawi zambiri sakhala osavuta kupanga minyewa kapena mabwalo, komanso sapanga ma colloid ozungulira osasungunuka atawonjezera madzi.
Nthawi zambiri amagwiritsidwa ntchito ngati thickener, zoteteza wothandizila, zomatira, stabilizer ndi zowonjezera pokonza emulsion, odzola, mafuta odzola, odzola, maso otsuka, suppository ndi piritsi, komanso ntchito monga hydrophilic gel osakaniza ndi mafupa zinthu 1. Kukonzekera kwa mafupa- mtundu kukonzekera mosalekeza-kumasulidwa. Itha kugwiritsidwanso ntchito ngati stabilizer muzakudya.
Nthawi yotumiza: Feb-02-2023