Hydroxypropylmethylcellulose (HPMC) bụ ngwakọta molekụla na-arụ ọrụ dị iche iche nke ejirila ọtụtụ ebe na ụlọ ọrụ ihe owuwu. A na-eji ya eme ihe n'ọtụtụ ebe na ngwa putty ka ọ na-eme ka arụmọrụ zuru oke na àgwà nke putty dịkwuo mma. N'isiokwu a, anyị ga-enyocha ngwa nke HPMC na putty, nyochaa nsogbu ndị nwere ike ibilite mgbe a na-eji ya eme ihe, ma kesaa ndụmọdụ ụfọdụ gbasara otu esi ezere nsogbu ndị a.
Mbụ, ka anyị lebakwuo anya na njirimara HPMC. Ọ bụ nonionic cellulose ether, soluble na mmiri na ụfọdụ organic solvents. Ọdịdị molekụla ya pụrụ iche na-enye ya ezigbo viscosity, njide mmiri na ihe nrapado. Ya mere, ọ bụ ihe mgbakwunye dị mma maka ngwa putty.
Enwere ike iji HPMC mee ihe dị ka thickener, ihe nkedo na emulsifier na nhazi nke putty. Ọ nwere njigide mmiri dị mma nke na-enyere aka igbochi putty ka ọ ghara ịnwụ ngwa ngwa. Ọ na-emekwa ka ntinye nke putty dịkwuo elu na mkpụrụ, na-eme ka ọ dịkwuo ogologo. Ngwongwo ndị a na-eme ka HPMC bụrụ ihe dị mkpa n'ime putties dị elu.
Otú ọ dị, ụfọdụ nsogbu nwere ike ime mgbe HPMC na-eji putty. Nsogbu mbụ bụ na HPMC na-enwe mmetụta maka pH na mgbanwe okpomọkụ. Ọ bụrụ na pH nke usoro putty dị oke acidic, ọ nwere ike ime ka HPMC hapụ viscosity. N'otu oge ahụ, ọ bụrụ na okpomọkụ dị oke elu, ọ ga-eme ka HPMC na-eweda ya ala, nke ga-emetụta arụmọrụ nke putty.
Nsogbu ọzọ nwere ike ibili bụ ịhịa aka n'ahụ. Ọ bụrụ na agwakọtaghị HPMC nke ọma na ihe ndị ọzọ dị na usoro putty, ọ nwere ike ịmalite mkpọkọ ma ọ bụ mkpọkọ. Mkpokọta ndị a na-emetụta àgwà nke putty, na-eme ka ọ ghara ịdị nro ma sie ike itinye.
Iji zere nsogbu ndị a, a ga-agbaso ụfọdụ iwu bụ isi mgbe ị na-eji HPMC na ngwa Putty. Nke mbụ, ọ dị mkpa ịhọrọ ụdị HPMC kwesịrị ekwesị maka nhazi putty. Ụdị HPMC dị iche iche nwere ike ịnwe njirimara dị iche iche, ya mere a ga-ahọrọ ụdị ziri ezi maka otu ngwa.
Nke abụọ, ọ dị mkpa ka ị gwakọta HPMC nke ọma na ihe ndị ọzọ dị na ntinye ntinye. Nke a ga-enyere aka igbochi akpụ ma ọ bụ akpụ. Ọ dịkwa mkpa iji usoro ngwakọta ziri ezi iji hụ na etinyere putty nke ọma.
Nke atọ, ṅaa ntị na pH na okpomọkụ nke usoro putty. Ọ dị mkpa ịhụ na pH dị n'ime oke akwadoro maka ụdị HPMC a na-eji. Ọ dịkwa mkpa iji nyochaa okpomọkụ nhazi ma debe ya n'ime oke akwadoro iji gbochie mmebi HPMC.
Na nchịkọta, HPMC bụ ihe dị mkpa na nhazi putty dị elu. Ọ na-enye njigide mmiri dị mma, njigide na njirimara viscosity nke nwere ike imeziwanye arụmọrụ na ogo nke putties. Otú ọ dị, ụfọdụ nsogbu nwere ike ime n'oge eji ya, dị ka uche na pH na okpomọkụ mgbanwe, caking, wdg Site n'ịgbaso ụfọdụ isi iwu mgbe eji HPMC, nsogbu ndị a nwere ike zere na a elu àgwà putty nwere ike nweta.
Oge nzipu: Jul-27-2023