Hydroxyethyl cellulose (HEC) ipolymer isinganyungudike mumvura, inobva mu cellulose kuburikidza nekuchinja kwemakemikari. Inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana nekuda kwehunhu hwayo hwakasiyana, hwakadai sekukora, kugadzikana, uye kugona kugadzira firimu. Mukushandiswa uko kugadzikana kwepH kwakakosha, kunzwisisa maitiro eHEC mumamiriro akasiyana epH kwakakosha.
Kugadzikana kwe pH kweHEC kunoreva kugona kwayo kuchengetedza chimiro chayo, hunhu hwe rheological, uye mashandiro ayo munzvimbo dzakasiyana siyana dze pH. Kugadzikana uku kwakakosha mukushandiswa kwakadai sezvigadzirwa zvekuchengetedza muviri, mishonga, machira, uye zvinhu zvekuvaka, uko pH yenzvimbo yakapoteredza inogona kusiyana zvakanyanya.
Maumbirwo:
HEC inowanzogadzirwa nekubatanidza cellulose ne ethylene oxide mumamiriro ezvinhu e alkaline. Maitiro aya anoguma nekutsiviwa kwemapoka e hydroxyl emusana we cellulose nemapoka e hydroxyethyl (-OCH2CH2OH). Dhigirii rekutsiviwa (DS) rinoratidza huwandu hwemapoka e hydroxyethyl pachikamu chimwe nechimwe che anhydroglucose mu cellulose chain.
Zvivakwa:
Kunyungudika: HEC inonyungudika mumvura uye inoumba mhinduro dzakajeka, dzakasimba.
Kusviba: Inoratidza maitiro epseudoplastic kana kucheka, zvichireva kuti kusviba kwayo kunoderera kana yave kusviba. Izvi zvinoita kuti ishande zvakanaka pakushandiswa kwayo uko kuyerera kwayo kwakakosha, senge pendi nependi.
Kukora: HEC inopa viscosity kune mhinduro, zvichiita kuti ive yakakosha semushonga wekukora mumhando dzakasiyana-siyana.
Kugadzira firimu: Inogona kugadzira mafirimu anochinjika uye akajeka kana yaoma, izvo zvinobatsira mukushandiswa senge zvinonamira uye zvinoputira.
pH Kugadzikana kweHEC
Kugadzikana kwepH kweHEC kunokonzerwa nezvinhu zvakasiyana-siyana, kusanganisira chimiro chemakemikari chepolymer, kusangana nemamiriro ekunze, uye chero zvinowedzera zviripo mukugadzirwa kwayo.
Kugadzikana kwePH kweHEC munzvimbo dzakasiyana dzepH:
1. Asidhi pH:
Kana iri acidic pH, HEC inowanzo gadzikana asi inogona kunyungudika kwenguva yakareba mumamiriro ezvinhu akaoma eacid. Zvisinei, muzvishandiso zvakawanda zvinoshanda, zvakaita sezvishandiso zvekuchengetedza muviri uye machira, apo acidic pH inosangana nayo, HEC inoramba yakagadzikana mukati me pH yakajairika (pH 3 kusvika 6). Pamusoro pe pH 3, njodzi ye hydrolysis inowedzera, zvichikonzera kudzikira zvishoma nezvishoma mu viscosity uye mashandiro. Zvakakosha kutarisa pH yemafomu ane HEC uye kuigadzirisa sezvinodiwa kuti irambe yakagadzikana.
2. pH isina kwayakarerekera:
HEC inoratidza kugadzikana kwakanaka pasi pemamiriro epH asina kusimba (pH 6 kusvika 8). Iyi pH range inowanikwa mukushandiswa kwakawanda, kusanganisira zvizoro, mishonga, uye zvigadzirwa zvemumba. Mafomula ane HEC anochengetedza viscosity yawo, hunhu hwekukora, uye mashandiro awo ese mukati meiyi pH range. Zvisinei, zvinhu zvakaita sekupisa uye simba reionic zvinogona kukanganisa kugadzikana uye zvinofanirwa kufungwa nezvazvo panguva yekugadzira fomura.
3. Alkaline pH:
HEC haina kugadzikana zvakanyanya kana ichienzaniswa neacidic kana neutral pH. Pamazinga epH akakwira (anopfuura pH 8), HEC inogona kuora, zvichikonzera kudzikira kwe viscosity uye kurasikirwa nekushanda. Alkaline hydrolysis ye ether linkages pakati pe cellulose backbone ne hydroxyethyl groups inogona kuitika, zvichikonzera kupwanyika kwe chain uye kudzikira kwehuremu hwemamorekuru. Nokudaro, mu alkaline formulations dzakadai se detergents kana zvinhu zvekuvaka, mamwe ma polymers kana stabilizers anogona kusarudzwa pane HEC.
Zvinhu Zvinokanganisa Kugadzikana kwepH
Zvinhu zvakasiyana-siyana zvinogona kukanganisa kugadzikana kwe pH kwe HEC:
Dhigirii reKutsiva (DS): HEC ine DS values yakakwira inowanzova yakagadzikana pane pH yakakura nekuda kwekuwedzera kwekutsiviwa kwemapoka ehydroxyl nemapoka ehydroxyethyl, izvo zvinowedzera kunyungudika kwemvura uye kuramba hydrolysis.
Tembiricha: Tembiricha yakakwira inogona kukurumidzisa makemikari, kusanganisira hydrolysis. Nokudaro, kuchengetedza tembiricha dzakakodzera dzekuchengetedza nekugadzira kwakakosha kuchengetedza pH yakasimba yemafomula ane HEC.
Simba reIonic: Kuwanda kwemunyu kana mamwe maion muchikamu ichi kunogona kukanganisa kugadzikana kweHEC nekuchinja kunyungudika kwayo uye kudyidzana kwayo nemamorekuru emvura. Simba reIonic rinofanira kugadziriswa kuti rideredze mhedzisiro yekusagadzikana.
Zvinowedzerwa: Kubatanidzwa kwezvinhu zvinowedzerwa zvakaita sema surfactants, zvinochengetedza, kana zvinogadzirisa zvinogona kukanganisa kugadzikana kwe pH kwe HEC formulations. Kuongororwa kwekuenderana kunofanirwa kuitwa kuti kuve nechokwadi chekuenderana uye kugadzikana kwekuwedzera.
Kufunga Nezvekushandisa uye Kuronga
Kunzwisisa kugadzikana kwepH yeHEC kwakakosha kune vanogadzira mafomula mumaindasitiri akasiyana-siyana.
Heano mamwe mafungiro anoenderana nekushandisa:
Zvigadzirwa Zvekuchengetedza Munhu: Mumashampoo, maconditioner, uye mafuta ekuzora, kuchengetedza pH mukati mehuwandu hwaunoda (kazhinji pasingasvikire) kunoita kuti HEC igare yakasimba uye ishande zvakanaka sechinhu chinosimbisa uye chinomisa bvudzi.
Mishonga: HEC inoshandiswa mumishonga inomiswa nemuromo, mishonga yemaziso, uye mishonga yemushonga. Mishonga inofanira kugadzirwa uye kuchengetwa mumamiriro ezvinhu anochengetedza HEC yakasimba kuti ive nechokwadi chekuti chigadzirwa chinoshanda uye kuti chigare kwenguva refu.
Kupenda nePendi: HEC inoshandiswa senzira yekugadzirisa rheology uye kuisimbisa mukupenda nekupenda zvinobva mumvura. Vagadziri vemagadzirirwo epurasitiki vanofanira kuyera pH nezvimwe zvinodiwa pakushanda zvakaita sekupenya, kuenzana, uye kugadzirwa kwefirimu.
Zvinhu zvekuvaka: Mukugadzira simende, HEC inoshanda sechinhu chinochengetedza mvura uye inovandudza kushanda kwayo. Zvisinei, mamiriro ealkaline esimende anogona kukonzera kusagadzikana kweHEC, zvichiita kuti pave nekusarudzwa kwakanyatsonaka uye kugadziriswa kwekugadzira.
Hydroxyethyl cellulose (HEC) inopa hunhu hunokosha hwe rheological uye hunoshanda mumashandisirwo akasiyana-siyana. Kunzwisisa kugadzikana kwayo kwepH kwakakosha kuti vagadziri vemagadziri vagadzire magadzirirwo akagadzikana uye anoshanda. Kunyange zvazvo HEC ichiratidza kugadzikana kwakanaka pasi pemamiriro epH asina kusimba, kunofanirwa kufungwa nezvenzvimbo dzine acidic nealkaline kudzivirira kuora uye kuona kuti inoshanda zvakanaka. Nekusarudza HEC grade yakakodzera, kugadzirisa maparamita ekugadzira, uye kushandisa mamiriro akakodzera ekuchengetedza, vagadziri vemagadzirirwo vanogona kushandisa mabhenefiti eHEC munzvimbo dzakasiyana-siyana dzepH.
Nguva yekutumira: Kurume-29-2024