1. Pakali pano kupanga zoweta zapakhomo ndi kufunikira kwa hydroxyethyl cellulose
1.1 Chiyambi cha Zamalonda
Hydroxyethyl cellulose (yotchedwa hydroxyethyl cellulose) ndi cellulose yofunikira ya hydroxyalkyl, yomwe idakonzedwa bwino ndi Hubert mu 1920 komanso ndi cellulose ether yosungunuka m'madzi yokhala ndi voliyumu yayikulu yopanga padziko lonse lapansi. Chokhacho ndicho ether chachikulu kwambiri komanso chomwe chikukula mwachangu pambuyo pa CMC ndi HPMC. Ma cellulose a Hydroxyethyl ndi polima osasungunuka m'madzi omwe amapangidwa ndi makina angapo a thonje woyengedwa (kapena zamkati zamatabwa). Ndi woyera, wosanunkhiza, wosakoma ufa kapena granular cholimba.
1.2 Kuthekera kwapadziko lonse lapansi kupanga ndi kufunikira
Pakadali pano, makampani akuluakulu padziko lonse lapansi opanga ma hydroxyethyl cellulose ali m'maiko akunja. Pakati pawo, makampani angapo monga Hercules ndi Dow ku United States ali ndi mphamvu zopanga zolimba kwambiri, ndikutsatiridwa ndi United Kingdom, Japan, Netherlands, Germany ndi Russia. Akuti mphamvu yapadziko lonse lapansi yopanga hydroxyethyl cellulose mu 2013 idzakhala matani 160,000, ndikukula kwapakati pachaka kwa 2.7%.
1.3 Kuthekera kwa kupanga ndi kufunikira kwa China
Pakali pano, zoweta zowerengera mphamvu kupanga hydroxyethyl mapadi ndi matani 13,000. Kupatula opanga ochepa, ena onse amakhala osinthidwa komanso ophatikizidwa, omwe si hydroxyethyl cellulose kwenikweni. Amakumana makamaka ndi msika wachitatu. Domestic pure hydroxyethyl cellulose Kutulutsa kwa cellulose kumakhala kosakwana matani 3,000 pachaka, ndipo msika wapakhomo pano ndi matani 10,000 pachaka, omwe oposa 70% amatumizidwa kunja kapena kuperekedwa ndi mabizinesi omwe amapereka ndalama zakunja. Opanga akuluakulu akunja ndi Yakuolong Company, Dow Company, Klein Company, AkzoNobel Company; zoweta hydroxyethyl mapadi opanga mankhwala makamaka monga North Cellulose, Shandong Yinying, Yixing Hongbo, Wuxi Sanyou, Hubei Xiangtai, Yangzhou Zhiwei, etc. The zoweta hydroxyethyl mapadi msika zimagwiritsa ntchito zokutira ndi mafakitale mankhwala tsiku ndi tsiku, ndi oposa 70% ya msika. gawo limakhala ndi zinthu zakunja. Gawo la misika ya nsalu, utomoni ndi inki. Pali kusiyana pakati pa zinthu zapakhomo ndi zakunja. Msika wapakhomo wa hydroxyethyl umayendetsedwa ndi zinthu zakunja, ndipo zogulitsa zapakhomo zimakhala pamsika wapakati komanso wotsika kwambiri. Gwiritsani ntchito pamodzi kuti muchepetse chiopsezo.
Kufunika kwa msika wa hydroxyethyl cellulose kumatengera dera, Pearl River Delta (South China) ndiye woyamba; kutsatiridwa ndi Yangtze River Delta (East China); chachitatu, Kumwera chakumadzulo ndi Kumpoto kwa China; Zovala za latex zapamwamba 12 Kupatulapo Nippon Paint ndi Zijinhua, zomwe likulu lake lili ku Shanghai, zina zonse zili ku South China. Kugawidwa kwamakampani opanga mankhwala tsiku ndi tsiku kulinso makamaka ku South China ndi East China.
Tikayang'ana kumtunda wa kupanga mphamvu, utoto ndi mafakitale omwe amagwiritsa ntchito kwambiri hydroxyethyl cellulose, kutsatiridwa ndi mankhwala a tsiku ndi tsiku, ndipo chachitatu, mafuta, ndi mafakitale ena amadya zochepa kwambiri.
Kupezeka kwapakhomo ndi kufunikira kwa hydroxyethyl cellulose: kuchuluka kokwanira ndi kuchuluka kwa kufunikira, cellulose yapamwamba kwambiri ya hydroxyethyl yatha pang'ono, ndipo kalasi yotsika ya hydroxyethyl cellulose, petroleum-grade hydroxyethyl cellulose, ndi cellulose yosinthidwa ya hydroxyethyl cellulose imaperekedwa makamaka ndi mabizinesi apakhomo. 70% ya msika wonse wapakhomo wa hydroxyethyl cellulose umakhala ndi hydroxyethyl cellulose yakunja.
Katundu ndi ntchito za 2-hydroxyethyl cellulose
2.1 Katundu wa hydroxyethyl cellulose
The katundu waukulu wa hydroxyethyl mapadi ndi kuti sungunuka m'madzi ozizira ndi madzi otentha, ndipo alibe gelling katundu. Ili ndi digirii yambiri yolowa m'malo, solubility ndi mamasukidwe akayendedwe. mvula. Hydroxyethyl cellulose yankho likhoza kupanga filimu yowonekera, ndipo ili ndi makhalidwe amtundu wa si-ionic omwe sagwirizana ndi ayoni ndipo ali ndi mgwirizano wabwino.
①Kutentha kwambiri komanso kusungunuka kwamadzi: Poyerekeza ndi methyl cellulose (MC), yomwe imasungunuka m'madzi ozizira okha, hydroxyethyl cellulose imatha kusungunuka m'madzi otentha kapena madzi ozizira. Zosiyanasiyana za kusungunuka ndi mawonekedwe a viscosity, ndi ma gelation osatentha;
②Kukana mchere: Chifukwa cha mtundu wake wosakhala wa ionic, umatha kukhala limodzi ndi ma polima ena osungunuka m'madzi, ma surfactants ndi mchere wambiri. Chifukwa chake, poyerekeza ndi ionic carboxymethyl cellulose (CMC), hydroxyethyl cellulose imakhala yabwino kukana mchere.
③Kusunga madzi, kusanja, kupanga filimu: mphamvu yake yosungira madzi imakhala yowirikiza kawiri kuposa ya methyl cellulose, yokhala ndi kayendetsedwe kabwino ka kayendedwe kake komanso kupanga mafilimu abwino kwambiri, kuchepetsa kutaya kwamadzimadzi, kusokoneza, kuteteza kugonana kwa colloid.
2.2 Kugwiritsa ntchito hydroxyethyl cellulose
Hydroxyethyl mapadi ndi sanali ionic madzi sungunuka mapadi etere mankhwala, chimagwiritsidwa ntchito zokutira zomangamanga, mafuta, polima polymerization, mankhwala, ntchito tsiku lililonse, pepala ndi inki, nsalu, ziwiya zadothi, zomangamanga, ulimi ndi mafakitale ena. Lili ndi ntchito za thickening, kugwirizana, emulsifying, dispersing and stabilizing, ndipo akhoza kusunga madzi, kupanga filimu ndi kupereka zoteteza colloid kwenikweni. Imasungunuka mosavuta m'madzi ozizira ndi madzi otentha, ndipo imatha kupereka yankho ndi ma viscosity osiyanasiyana. Imodzi mwama cellulose ethers othamanga kwambiri.
1) utoto wa latex
Hydroxyethyl cellulose ndizomwe zimagwiritsidwa ntchito kwambiri pazovala za latex. Kuphatikiza pakukulitsa zokutira za latex, zimathanso kutulutsa, kubalalitsa, kukhazikika ndikusunga madzi. Amadziwika ndi kukhuthala kochititsa chidwi, kukula kwamtundu wabwino, kupanga mafilimu komanso kukhazikika kosungirako. Hydroxyethyl cellulose ndi chochokera ku cellulose chosakhala ionic chomwe chitha kugwiritsidwa ntchito mumitundu yambiri ya pH. Zimagwirizana bwino ndi zinthu zina zomwe zili mu gawoli (monga inki, zowonjezera, zodzaza ndi mchere). Zopaka zokhuthala ndi hydroxyethyl cellulose zimakhala ndi rheology yabwino pamitengo yometa ubweya wosiyanasiyana ndipo ndi pseudoplastic. Njira zomangira monga kupukuta, zokutira ndi kupopera mbewu mankhwalawa zingagwiritsidwe ntchito. Kumanga kwabwino, kosavuta kudontha, kugwedera ndi kuwaza, komanso kusanja bwino.
Nthawi yotumiza: Nov-11-2022