MC ni selulosi ya methyl, iboneka binyuze mu gutunganya ipamba itunganyijwe na alkali, hakoreshejwe methyl chloride nk'ikintu gitanga eteri, no gukora eteri ya selulosi binyuze mu buryo butandukanye. Muri rusange, urwego rwo gusimbuza ni 1.6 ~ 2.0, kandi gushonga nabyo biratandukanye bitewe n'urwego rwo gusimbuza. Ni iy'eteri ya selulosi itari ioni.
(1) Uburyo amazi abikwamoselulose ya methylbiterwa n'ingano y'inyongera zayo, ubukana, ubukana bw'uduce duto n'umuvuduko wo gusenyuka. Muri rusange, iyo ingano y'inyongera ari nini, ubukana buba buto, kandi ubukana ari bwinshi, umuvuduko wo kubika amazi uba munini. Muri byo, ingano y'inyongera igira ingaruka nini ku muvuduko wo kubika amazi, kandi urwego rw'ubukana ntabwo rungana n'urwego rw'umuvuduko wo kubika amazi. Umuvuduko wo gusenyuka uterwa ahanini n'urugero rw'impinduka z'ubuso bw'uduce twa selulose n'ubukana bw'uduce duto. Muri eteri za selulose zavuzwe haruguru, methyl cellulose na hydroxypropyl methyl cellulose bifite umuvuduko wo kubika amazi mwinshi.
(2) Methylcellulose irashongesha mu mazi akonje, ariko iragoye gushonga mu mazi ashyushye, kandi umuti wayo w'amazi uhoraho cyane mu rugero rwa pH = 3 ~ 12. Ikorana neza na sitashi, guar gum, nibindi nibindi byinshi bya surfactants. Iyo ubushyuhe bugeze ku bushyuhe bwa gelation, habaho ikintu cyo gushonga.
(3) Impinduka mu bushyuhe zigira ingaruka zikomeye ku muvuduko wo kubika amazi muri selulosi ya methyl. Muri rusange, uko ubushyuhe burushaho kuba bwinshi, ni ko kubika amazi birushaho kuba bibi. Iyo ubushyuhe bwa selulosi burenze 40 °C, kubika amazi muri selulosi ya methyl bizaba bibi cyane, ibyo bizagira ingaruka zikomeye ku buryo selulosi ikora.
(4) Methyl cellulose igira ingaruka zikomeye ku buryo ikoreshwa n'uburyo ifatana. "Gufatana" hano bivuga uburyo ifatana hagati y'igikoresho cy'umukozi n'urukuta, ni ukuvuga uburyo ifatana n'imashini. Uburyo ifatana ni bwinshi, uburyo ifatana n'imashini ni nini, kandi imbaraga zisabwa n'abakozi mu ikoreshwa nazo ni nini, kandi imiterere y'imashini ni mbi. Uburyo ifatana n'imashini ya Methylcellulose iri ku rwego rwo hagati mu bicuruzwa bya ether ya cellulose.
HPMC ni hydroxypropyl methyl cellulose, ikaba ari eteri ivanze na cellulose itari ionic ikozwe mu ipamba itunganyijwe nyuma yo gusukurwa na alkali, hakoreshejwe propylene oxide na methyl chloride nk'ibintu bihindura umwuka, ndetse no binyuze mu buryo butandukanye. Igipimo cyo gusimbuza muri rusange ni 1.2 kugeza 2.0. Imiterere yayo iratandukanye bitewe n'ingano y'ibikubiye muri methoxyl n'ibikubiye muri hydroxypropyl.
(1) Hydroxypropyl methylcellulose ishongeshwa byoroshye mu mazi akonje, ariko izahura n'ingorane mu gushonga mu mazi ashyushye. Ariko ubushyuhe bwayo bwo gushonga mu mazi ashyushye buri hejuru cyane ugereranyije n'ubwa methyl cellulose. Gushonga mu mazi akonje nabyo birarushaho kwiyongera ugereranije na methyl cellulose.
(2) Uburemere bwa hydroxypropyl methylcellulose bufitanye isano n'ingano y'uburemere bwayo bwa molekile, kandi uko uburemere bwa molekile burushaho kuba bwinshi, niko uburemere burushaho kuba bwinshi. Ubushyuhe nabwo bugira ingaruka ku buremere bwayo, uko ubushyuhe bwiyongera, uburemere bugabanuka. Ariko uburemere bwayo ntibugira ingaruka cyane ku bushyuhe bwinshi kurusha methyl cellulose. Umuti wayo uhoraho iyo ubitswe ku bushyuhe bw'icyumba.
(3) Hydroxypropyl methylcellulose irahamye kuri aside na alkali, kandi umuti wayo w'amazi urahamye cyane mu rugero rwa pH = 2 ~ 12. Soda ya Caustic na lime amazi ntacyo bigira ku mikorere yayo, ariko alkali ishobora kwihutisha gushonga kwayo no kongera ubukana. Hydroxypropyl methylcellulose irahamye kuri umunyu usanzwe, ariko iyo ubwinshi bw'umunyu buri hejuru, ubukana bw'umuti wa hydroxypropyl methylcellulose bukunda kwiyongera.
(4) Uburyo amazi abikwamohydroxypropyl methylcellulosebiterwa n'ingano y'inyongera zayo, ubukana bwayo, n'ibindi. Igipimo cyo kubika amazi munsi y'ingano imwe y'inyongera kiri hejuru y'icya methyl cellulose.
(5) Hydroxypropyl methylcellulose ishobora kuvangwa n'ibinyabutabire bya polymer bishongeshwa n'amazi kugira ngo bikore umuti ufite ubukana bumwe kandi buri hejuru. Nka polyvinyl alcohol, starch ether, vegetable gum, nibindi.
(6) Uburyo hydroxypropyl methylcellulose ifatana n'imiterere ya mortier buruta ubw'uburyo methylcellulose ifatana.
(7) Hydroxypropyl methylcellulose ifite ubudahangarwa bwiza kuri enzymes kurusha methylcellulose, kandi ubushobozi bwayo bwo kwangirika kwa enzymes ni buke ugereranyije n’ubwa methylcellulose.
Igihe cyo kohereza: 28 Mata 2024