Thickener hec hydroxyethyl cellulose

Hydroxyethyl cellulose (HEC) ndi nonionic cellulose yochokera ku cellulose yomwe imagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana chifukwa cha kukhuthala kwake, kuyimitsa, komanso kukulitsa. HEC ndi polima yosungunuka m'madzi yomwe imatha kusungunuka mosavuta m'madzi ozizira kuti ipange mayankho omveka bwino komanso opanda mtundu. HEC imagwiritsidwa ntchito mobwerezabwereza ngati thickener muzinthu zambiri, kuphatikizapo zokutira, zomatira, mankhwala osamalira anthu, ndi mankhwala.

HEC imapangidwa posintha cellulose yachilengedwe, polima yokhala ndi mayunitsi a shuga olumikizidwa pamodzi ndi β(1→4) glycosidic bond. Kusintha kwa cellulose kumaphatikizapo kuyambitsa magulu a hydroxyethyl (-CH2CH2OH) pamagulu a anhydroglucose a msana wa cellulose. Kusintha kumeneku kumabweretsa polima yosungunuka m'madzi yomwe imatha kupanga zomangira za haidrojeni ndi mamolekyu amadzi, zomwe zimapangitsa kuti pakhale yankho la viscous.

HEC ndi thickener yogwira mtima chifukwa cha kuthekera kwake kupanga mawonekedwe ngati gel pamene akuwonjezeredwa ku yankho. Magulu a hydroxyethyl pa molekyulu ya HEC amatha kuyanjana ndi mamolekyu amadzi, zomwe zimapangitsa kupanga ma hydrogen bond. Zomangira za haidrojeni pakati pa molekyulu ya HEC ndi mamolekyu amadzi zimapangitsa kuti molekyulu ya HEC ikhale hydrated ndikukula kukula. Pamene molekyu ya HEC ikukulirakulira, imapanga mawonekedwe a maukonde atatu-dimensional omwe amatchera madzi ndi zigawo zina zosungunuka, zomwe zimapangitsa kuwonjezeka kwa kukhuthala kwa yankho.

Mphamvu yowonjezereka ya HEC imakhudzidwa ndi zinthu zosiyanasiyana, kuphatikizapo kuchuluka kwa HEC mu yankho, kutentha, ndi pH. Kuchulukitsidwa kwapamwamba kwa HEC mu njira yothetsera vutoli kumabweretsa kuwonjezeka kwakukulu kwa viscosity. Komabe, kuonjezera kuchuluka kwa HEC kupitirira mfundo inayake kungayambitse kuchepa kwa viscosity chifukwa cha mapangidwe amagulu. Kutentha kumakhudzanso mphamvu yowonjezereka ya HEC, ndi kutentha kwakukulu komwe kumapangitsa kuchepa kwa viscosity. PH ya yankho ikhoza kukhudzanso mphamvu yowonjezereka ya HEC, yokhala ndi pH yamtengo wapatali yomwe imayambitsa kuchepa kwa viscosity.

HEC imagwiritsidwa ntchito kwambiri ngati chowonjezera pazinthu zosiyanasiyana, kuphatikiza zokutira ndi utoto. Mu zokutira, HEC imawonjezedwa ku mapangidwe kuti apititse patsogolo mawonekedwe a rheological a zokutira. Maonekedwe a rheological a zokutira amatanthawuza kuthekera kwake koyenda ndikukwera pamwamba. HEC ikhoza kupititsa patsogolo kayendetsedwe kake ndi kuwongolera kwa zokutira powonjezera kukhuthala kwake ndikuchepetsa chizolowezi chake. HEC imathanso kukonza kukhazikika kwa zokutira poletsa kukhazikika kwa inki ndi zolimba zina.

Mu zomatira, HEC imagwiritsidwa ntchito ngati thickener kuti ipititse patsogolo kukhuthala komanso kulimba kwa zomatira. Kukhuthala kwa zomatira ndikofunikira kuti athe kumamatira pamwamba ndikukhalabe pamalo. HEC imatha kupititsa patsogolo kukhuthala kwa zomatira ndikuletsa kudontha kapena kuthamanga. HEC imathanso kupititsa patsogolo kukhazikika kwa zomatira, kulola kuti kumamatira bwino pamwamba.

Muzinthu zosamalira anthu, HEC imagwiritsidwa ntchito ngati thickener ndi stabilizer. HEC imagwiritsidwa ntchito nthawi zambiri mu ma shampoos, zowongolera, ndi zotsuka zathupi kuti zisinthe mawonekedwe awo komanso mawonekedwe awo. HEC imathanso kupititsa patsogolo kukhazikika kwazinthuzi poletsa kulekanitsa gawo ndikukhazikitsa zolimba.

Mu mankhwala, HEC amagwiritsidwa ntchito ngati thickener ndi kuyimitsa wothandizira. HEC imagwiritsidwa ntchito kwambiri poyimitsa pakamwa kuti ayimitse mankhwala osasungunuka m'madzi amadzimadzi. HEC itha kugwiritsidwanso ntchito ngati chowonjezera mumafuta am'mutu ndi ma gels kuti apititse patsogolo kukhuthala kwawo komanso mawonekedwe awo.

Pomaliza, HEC ndi polima wosungunuka m'madzi womwe umagwiritsidwa ntchito kwambiri ngati thickener m'mafakitale osiyanasiyana chifukwa cha kukhuthala kwake, kuyimitsidwa, komanso kupangira emulsifying.