I-Hydroxyethylcellulose (HEC) yi-polymer engeyiyo i-ionic, enyibilikayo emanzini ephuma kwi-cellulose. Isetyenziswa kakhulu kumashishini ahlukeneyo afana namayeza, izinto zokuthambisa, ukutya, kunye neemveliso zokhathalelo lomntu ngenxa yeempawu zayo zokutyeba, ukuzinza, kunye nokufaka i-gelling.
Ulwakhiwo lweKhemikhali lweHydroxyethylcellulose
I-HEC yi-polymer ye-cellulose eguquliweyo, apho amaqela e-hydroxyethyl afakwa kwi-cellulose backbone. Olu tshintsho luphucula ukunyibilika kwamanzi kunye nezinye iipropati ze-cellulose. Amaqela e-hydroxyethyl (-CH2CH2OH) adityaniswe ngokudibeneyo namaqela e-hydroxyl (-OH) emolekyuli ye-cellulose. Olu tshintsho lutshintsha iipropati zomzimba nezekhemikhali ze-cellulose, okwenza ukuba ifaneleke kwiintlobo ngeentlobo zezicelo.
Iimpawu zokutsha
1. Ukutsha
I-cellulose ecocekileyo yinto etshayo kuba inamaqela e-hydroxyl, anokutsha. Nangona kunjalo, ukungeniswa kwamaqela e-hydroxyethyl kwi-cellulose backbone kutshintsha iimpawu zayo zokutsha. Ukubakho kwamaqela e-hydroxyethyl kunokuchaphazela indlela yokutsha ye-HEC xa kuthelekiswa ne-cellulose engatshintshwanga.
2. Uvavanyo lokutsha
Uvavanyo lokutsha lubalulekile ukuze kuchongwe iingozi zomlilo ezinxulumene nezinto. Uvavanyo oluqhelekileyo oluhlukeneyo, olufana ne-ASTM E84 (Indlela yoVavanyo oluQhelekileyo lweempawu zokutsha komphezulu wezinto zokwakha) kunye ne-UL 94 (Indlela yoKhuseleko lokutsha kwezixhobo zeplastiki kwiindawo kwizixhobo nakwizixhobo), zisetyenziselwa ukuvavanya ukutsha kwezixhobo. Olu vavanyo luvavanya iiparameter ezifana nokusasazeka kwelangatye, uphuhliso lomsi, kunye neempawu zokutsha.
Izinto Ezichaphazela Ukutsha
1. Umxholo wobumanzi
Ubukho bomswakama bunokuchaphazela ukutsha kwezinto. Izinto ze-cellulosic azitshi kakhulu xa ziqulathe amanqanaba aphezulu okufuma ngenxa yokufunxwa kobushushu kunye nefuthe lokupholisa kwamanzi. I-Hydroxyethylcellulose, ekubeni inyibilika emanzini, inokuba nomlinganiselo owahlukeneyo wokufuma kuxhomekeke kwiimeko zendalo.
2. Ubungakanani beenxalenye kunye nobuninzi bazo
Ubungakanani beesuntswana kunye nobuninzi bezinto zinokuchaphazela ukutsha kwazo. Izinto ezahlulwe kakuhle zihlala zinendawo ephezulu, nto leyo ekhuthaza ukutsha ngokukhawuleza. Nangona kunjalo, i-HEC idla ngokusetyenziswa kwimo yomgubo okanye i-granulated kunye nobukhulu beesuntswana ezilawulwayo ukuhlangabezana neemfuno ezithile zokusetyenziswa.
3. Ubukho bezongezo
Kwiindlela ezisebenzayo, iifomyula ze-hydroxyethylcellulose zinokuba nezongezo ezifana neeplastiki, iziqinisi, okanye iziqinisi zomlilo. Ezi zongezo zinokutshintsha iimpawu zokutsha kweemveliso ezisekwe kwi-HEC. Umzekelo, iziqinisi zomlilo zinokucinezela okanye zilibazise ukutsha kunye nokusasazeka kwamalangatye.
Iingozi zoMlilo kunye nezinto eziqwalaselwayo ngoKhuseleko
1. Ukugcinwa kunye nokuphathwa
Iindlela ezifanelekileyo zokugcina nokuphatha izinto zibalulekile ukunciphisa umngcipheko weziganeko zomlilo. I-Hydroxyethylcellulose kufuneka igcinwe kwindawo eyomileyo, enomoya ococekileyo kude nemithombo enokubakho yokutsha. Kufuneka kuthathwe inyameko ukuthintela ukuvezwa kubushushu obugqithisileyo okanye elangeni ngqo, nto leyo enokubangela ukubola okanye ukutsha.
2. Ukuthotyelwa kweMithetho
Abavelisi kunye nabasebenzisi beemveliso eziqulethe i-hydroxyethylcellulose kufuneka bathobele imigaqo nemigangatho yokhuseleko efanelekileyo. Imibutho elawulayo efana ne-Occupational Safety and Health Administration (OSHA) e-United States kunye ne-European Chemicals Agency (ECHA) kwi-European Union inika izikhokelo zokuphathwa nokusetyenziswa kweekhemikhali ngokukhuselekileyo.
3. Amanyathelo okuNciphisa uMlilo
Kwimeko yomlilo oquka i-hydroxyethylcellulose okanye iimveliso ezine-HEC, kufuneka kusetyenziswe amanyathelo afanelekileyo okucima umlilo. Oku kungabandakanya ukusebenzisa amanzi, i-carbon dioxide, izicima-mlilo ezomileyo, okanye i-foam, kuxhomekeke kuhlobo lomlilo kunye nendawo engqongileyo.
I-hydroxyethylcellulose yi-polymer ye-cellulose eguquliweyo esetyenziswa kakhulu kumashishini ahlukeneyo ngenxa yeempawu zayo zokuzinza nokuqina. Nangona i-cellulose ecocekileyo inokutsha, ukungeniswa kwamaqela e-hydroxyethyl kutshintsha iimpawu zokutsha ze-HEC. Izinto ezinje ngomthamo womswakama, ubungakanani bamasuntswana, uxinano, kunye nokuba khona kwezongezo zinokuchaphazela ukutsha kweemveliso eziqulethe i-hydroxyethylcellulose. Ukugcinwa, ukuphathwa, kunye nokuthotyelwa kwemigaqo yokhuseleko ngokufanelekileyo kubalulekile ukunciphisa iingozi zomlilo ezinxulumene ne-HEC. Uphando olongezelelweyo kunye novavanyo lunokufuneka ukuze kuqondwe ngokupheleleyo indlela i-hydroxyethylcellulose enokutsha ngayo phantsi kweemeko ezahlukeneyo kunye neendlela zokwenziwa.
Ixesha lokuthumela: Epreli-09-2024