Utoto, womwe nthawi zambiri umatchedwa utoto ku China. Utoto womwe umatchedwa utotowo umapakidwa pamwamba pa chinthu chomwe chiyenera kutetezedwa kapena kukongoletsedwa, ndipo ukhoza kupanga filimu yopitilira yolumikizidwa mwamphamvu ndi chinthu chomwe chiyenera kuphimbidwa.
Kodi Hydroxyethyl Cellulose ndi chiyani?
Hydroxyethyl cellulose (HEC), yoyera kapena yachikasu chopepuka, yopanda fungo, yopanda poizoni, yopangidwa ndi etherification reaction ya alkaline cellulose ndi ethylene oxide (kapena chlorohydrin), ndi ya Nonionic soluble cellulose ethers. Popeza HEC ili ndi mphamvu zabwino zokhuthala, kuyimitsa, kufalitsa, kusakaniza, kulumikiza, kupanga filimu, kuteteza chinyezi komanso kupereka colloid yoteteza, yagwiritsidwa ntchito kwambiri pakufufuza mafuta, zokutira, zomangamanga, mankhwala, chakudya, nsalu, kupanga mapepala ndi polima Polymerization ndi madera ena.
Kodi chimachitika n’chiyani ngati hydroxyethyl cellulose yakumana ndi utoto wochokera m’madzi?
Monga chinthu chopanda ma ionic surfactant, hydroxyethyl cellulose ili ndi zinthu zotsatirazi kuwonjezera pa kukhuthala, kuyimitsa, kumangirira, kuyandama, kupanga filimu, kufalitsa, kusunga madzi ndikupereka colloid yoteteza:
HEC imasungunuka m'madzi otentha kapena m'madzi ozizira, kutentha kwambiri kapena kuwira popanda mvula, kotero kuti imakhala ndi mitundu yosiyanasiyana ya kusungunuka ndi kukhuthala, komanso gelation yosatentha;
Mphamvu yosungira madzi ndi yowirikiza kawiri kuposa ya methyl cellulose, ndipo ili ndi kayendedwe kabwino ka madzi;
Poyerekeza ndi methyl cellulose yodziwika bwino ndi hydroxypropyl methyl cellulose, mphamvu yobalalitsira ya HEC ndiyo yoyipa kwambiri, koma mphamvu yoteteza ya colloid ndiyo yamphamvu kwambiri.
Siyothandiza pa ionic ndipo imatha kukhala limodzi ndi ma polima ena ambiri osungunuka m'madzi, ma surfactants, ndi mchere. Ndi chinthu chabwino kwambiri chokhuthala cha colloidal cha mayankho a electrolyte okhala ndi kuchuluka kwakukulu;
Kodi mungagwiritse ntchito bwanji hydroxyethyl cellulose? Kodi mungaiwonjezere bwanji?
Onjezani mwachindunji panthawi yopanga - njira iyi ndi yosavuta komanso imatenga nthawi yochepa kwambiri.
Onjezani madzi oyera mu chidebe chachikulu chokhala ndi chosakaniza chodula kwambiri. Yambani kusakaniza mosalekeza pa liwiro lotsika ndipo pang'onopang'ono sefa hydroxyethyl cellulose mu yankho mofanana. Pitirizani kusakaniza mpaka tinthu tonse titanyowa. Kenako onjezerani zosungira ndi zowonjezera zosiyanasiyana. Monga utoto, zosakaniza zobalalitsira, madzi a ammonia, ndi zina zotero. Sakanizani mpaka hydroxyethyl cellulose yonse isungunuke kwathunthu (kukhuthala kwa yankho kumawonjezeka kwambiri) musanawonjezere zigawo zina mu fomula yochitira izi.
Yokhala ndi mowa wotsekemera
Ndiko kukonzekera mowa wa mayi ndi kuchuluka kwakukulu kaye, kenako nkuuwonjezera ku chinthucho. Ubwino wa njira iyi ndikuti uli ndi kusinthasintha kwakukulu ndipo ukhoza kuwonjezeredwa mwachindunji ku chinthu chomalizidwa, koma chiyenera kusungidwa bwino. Masitepe a njira iyi ndi ofanana ndi masitepe ambiri mu njira yoyamba; kusiyana kwake ndikuti palibe chifukwa chogwiritsa ntchito choyambitsa kutentha kwambiri, ndipo ma agitator ena okha omwe ali ndi mphamvu zokwanira kuti hydroxyethyl cellulose ifalikire mofanana mu yankho ndi omwe angapitirire popanda kuyimitsa Sakanizani mpaka itasungunuka kwathunthu kukhala yankho lolimba. Komabe, ziyenera kudziwika kuti fungicide iyenera kuwonjezeredwa ku mowa wa mayi mwachangu momwe zingathere.
Popeza hydroxyethyl cellulose yokonzedwa pamwamba ndi yolimba ngati ufa kapena ulusi, Lihongde imakukumbutsani kuti muzisamala mfundo zotsatirazi mukakonza mowa wa hydroxyethyl cellulose mother:
(1) Musanawonjezere hydroxyethyl cellulose komanso mutatha kuisakaniza, iyenera kusunthidwa mosalekeza mpaka yankholo litawonekera bwino komanso loyera.
(2) Iyenera kusefedwa pang'onopang'ono mu thanki yosakanizira, ndipo musaikemo zambiri kapena kuyika mwachindunji hydroxyethyl cellulose mu thanki yosakanizira.
(3) Kutentha kwa madzi ndi PH m'madzi zili ndi ubale wofunikira ndi kusungunuka kwa hydroxyethyl cellulose, kotero chisamaliro chapadera chiyenera kuperekedwa.
(4) Musawonjezere zinthu zina zamchere mu chisakanizocho musananyowetse ufa wa hydroxyethyl cellulose. Kukweza pH mukatha kunyowetsa kumathandiza kusungunuka.
(5) Momwe mungathere, onjezerani mankhwala ophera ma fungus pasadakhale
(6) Mukagwiritsa ntchito hydroxyethyl cellulose yokhala ndi kukhuthala kwakukulu, kuchuluka kwa mowa wothira sikuyenera kupitirira 2.5-3% (potengera kulemera), apo ayi mowa wothira udzakhala wovuta kuugwiritsa ntchito.
Nthawi yotumizira: Mar-02-2023