Cellulose shine polysaccharide wanda ke samar da nau'ikan ethers masu narkewa da ruwa. Cellulose thickeners ne nonionic ruwa-soluble polymers. Tarihin amfani da shi yana da tsayi sosai, sama da shekaru 30, kuma akwai nau'ikan iri da yawa. Har yanzu ana amfani da su a kusan dukkanin fenti na latex kuma sune manyan abubuwan da ake amfani da su na kauri. Masu kauri na cellulosic suna da tasiri sosai a cikin tsarin ruwa saboda suna yin kauri da kansu. A cikin masana'antar fenti, mafi yawan amfani da kauri na cellulose sune:methyl cellulose (MC), hydroxyethyl cellulose (HEC)ethyl hydroxyethyl cellulose (EHEC), hydroxypropyl cellulose (HPC),hydroxypropyl methyl cellulose (HPMC)da hydrophobically modified hydroxyethyl cellulose (HMHEC). HEC polysaccharide ne mai narkewa da ruwa wanda aka yadu ana amfani dashi a cikin kauri na matt da Semi-mai sheki na zanen latex na gine-gine. Ana samun masu kauri a cikin nau'ikan danko daban-daban kuma masu kauri tare da wannan cellulose suna da kyakkyawan yanayin launi da kwanciyar hankali.
Matsakaicin matakin, anti-splash, ƙirƙirar fina-finai da kaddarorin anti-sagging na fim ɗin ya dogara da nauyin kwayoyin halitta na dangi.HEC. HEC da sauran nau'ikan polymers masu narkewar ruwa waɗanda ba su da alaƙa suna yin kauri a cikin lokaci mai ruwa. Ana iya amfani da kauri na cellulose shi kaɗai ko a hade tare da sauran masu kauri don samun rheology na musamman. Cellulose ethers na iya samun nau'ikan ma'auni daban-daban na kwayoyin halitta da ma'aunin danko daban-daban, kama daga ƙananan nauyin kwayoyin halitta 2% bayani mai ruwa tare da danko na kusan 10 mP s zuwa babban dankon nauyin kwayoyin halitta na 100 000 mP s. Ana amfani da ƙananan ma'aunin nauyi na ƙwayoyin cuta azaman colloid masu kariya a cikin fenti emulsion polymerization na latex, kuma galibi ana amfani da maki (dankowar 4 800-50 000 mP·s) azaman masu kauri. Tsarin wannan nau'in kauri yana faruwa ne saboda yawan ruwa mai yawa na haɗin hydrogen da kuma haɗakar da ke tsakanin sarƙoƙi na ƙwayoyin cuta.
Cellulose na gargajiya babban nau'in nau'in nau'in kwayar halitta ne wanda ke yin kauri musamman ta hanyar ruɗewa tsakanin sarƙoƙi na ƙwayoyin cuta. Saboda babban danko a ƙananan raguwa, kayan haɓakawa ba su da kyau, kuma yana tasiri mai sheki na fim din. A cikin ƙananan ƙwayar cuta, danko yana da ƙananan, juriya na juriya na fim din ba shi da kyau, kuma cikar fim din ba shi da kyau. Halayen aikace-aikacen HEC, kamar juriya na goga, yin fim da abin nadi, suna da alaƙa kai tsaye da zaɓi na thickener. Har ila yau kaddarorin sa na kwarara kamar matakin daidaitawa da juriya na sag sun fi shafar masu kauri.
Hydrophobically modified cellulose (HMHEC) wani kauri ne na cellulose wanda ke da gyare-gyare na hydrophobic akan wasu sarƙoƙi masu rassa (an gabatar da ƙungiyoyin alkyl masu tsayi da yawa tare da babban sarkar tsarin). Wannan shafi yana da mafi girman danko a babban adadin kuzari don haka mafi kyawun samuwar fim. Irin su Natrosol Plus Grade 330, 331, Cellosize SG-100, Bermocoll EHM-100. Tasirinsa mai kauri yana kama da na cellulose ether thickeners tare da mafi girma dangin kwayoyin halitta. Yana inganta danko da matakin ICI, kuma yana rage tashin hankali. Alal misali, yanayin zafi na HEC yana da kusan 67 mN / m, kuma yanayin zafi na HMHEC shine 55 ~ 65 mN / m.
HMHEC yana da kyau kwarai sprayability, anti-sagging, matakin Properties, mai kyau sheki da kuma anti-pigment caking. Ana amfani dashi ko'ina kuma ba shi da wani mummunan tasiri a kan samuwar fim na kyawawan nau'ikan fenti na latex. Kyakkyawan aikin samar da fim da aikin rigakafin lalata. Wannan ƙaƙƙarfan ƙaƙƙarfan haɗin gwiwa yana aiki mafi kyau tare da tsarin copolymer na vinyl acetate kuma yana da kaddarorin kama da sauran masu kauri masu alaƙa, amma tare da tsari mafi sauƙi.
Lokacin aikawa: Afrilu-25-2024