Ọrụ nke cellulose ether n'ime ngwa agha bụ: njide mmiri, ịba ụba nke ịdị n'otu, ịdị arọ, na-emetụta oge nhazi, na ihe ndị na-emepụta ikuku.N'ihi njirimara ndị a, ọ nwere ohere ngwa ngwa na-ewu ihe ngwa ngwa.
1. Njide mmiri nke cellulose ether bụ njirimara kachasị mkpa na ntinye ngwa ngwa.
Ihe ndị bụ isi na-emetụta njigide mmiri nke cellulose ether: viscosity, nha nha, usoro onunu ogwu, ihe na-arụ ọrụ, ọnụego mgbasa, usoro njigide mmiri: njide mmiri nke cellulose ether n'onwe ya sitere na solubility na akpịrị ịkpọ nkụ nke cellulose ether n'onwe ya.Ọ bụ ezie na agbụ molekụla cellulose nwere ọnụ ọgụgụ dị ukwuu nke hydroxyl dị iche iche nwere ikike hydration siri ike, ọ bụghị soluble na mmiri.Nke a bụ n'ihi na usoro cellulose nwere ogo dị elu nke crystallinity, na ikike hydration nke otu hydroxyl naanị ezughị iji bibie njikọ dị n'etiti intermolecular siri ike.Hydrogen bonds na van der Waals agha, ya mere ọ na-aza naanị ma ọ dịghị agbaze na mmiri.Mgbe etinyere ihe ngbanwe n'ime agbụ molekụla, ọ bụghị naanị ihe mgbakwunye na-agbaji njikọ hydrogen, kamakwa njikọ interchain hydrogen na-agbaji n'ihi ịgbanye ihe nọchiri anya n'etiti ụdọ ndị dị n'akụkụ.Ka nnukwu ihe nọchiri anya ya, ka ebe dị anya n'etiti ụmụ irighiri ihe bụ, nke na-emebi mmetụta njikọ hydrogen.Ihe dị ukwuu nke cellulose lattice, ihe ngwọta na-abanye mgbe cellulose lattice gbasaa, na cellulose ether na-aghọ mmiri-soluble, na-eme ihe ngwọta dị elu nke viscosity.Mgbe okpomọkụ na-ebili, hydration nke polymer na-ada mbà, a na-achụpụkwa mmiri n'etiti agbụ.Mgbe akpịrị ịkpọ nkụ ahụ zuru oke, ụmụ irighiri ihe na-amalite ịgbakọta, na-eme usoro netwọk akụkụ atọ na mmiri ozuzo gel.
(1) Mmetụta nke nha nha na ngwakọta oge cellulose ether na njide mmiri
N'otu ego nke cellulose ether, njide mmiri nke ngwa agha na-abawanye na mmụba nke viscosity;mmụba nke ọnụ ọgụgụ cellulose ether na mmụba nke viscosity na-eme ka njigide mmiri nke ngwa agha.Mgbe ọdịnaya nke cellulose ether karịrị 0.3%, mgbanwe nke njigide mmiri ngwa agha na-achọ ka ọ bụrụ nke ziri ezi.A na-achịkwa ike njide mmiri nke ngwa agha site na oge mgbasa, na ether cellulose kacha mma na-agbaze ngwa ngwa, ikike njide mmiri na-etolite ngwa ngwa.
(2) Mmetụta nke ogo etherification nke cellulose ether na okpomọkụ na njide mmiri
Ka okpomọkụ na-ebili, njide mmiri na-ebelata, na ọkwa dị elu nke etherification nke cellulose ether, otú ahụ ka mma mmiri dị elu nke cellulose ether dị.Mgbe a na-eji ya eme ihe, okpomọkụ nke ngwa ngwa agwakọta ọhụrụ na-adịkarị ala karịa 35 Celsius, na n'okpuru ọnọdụ ihu igwe pụrụ iche, okpomọkụ nwere ike iru ma ọ bụ ọbụna gafere 40 Celsius.N'okwu a, a ghaghị imezi usoro ahụ ma họrọ ngwaahịa nwere ogo dị elu nke etherification.Ya bụ, tụlee ịhọrọ cellulose ether kwesịrị ekwesị.
2. Mmetụta nke cellulose ether na ikuku ikuku nke ngwa agha
N'ime ngwa ngwa agwakọta agwakọta akọrọ, n'ihi mgbakwunye nke cellulose ether, a na-ewebata obere ikuku ikuku, nke kesara n'otu na nke kwụsiri ike n'ime ngwa agha agwakọtara ọhụrụ.N'ihi mmetụta bọọlụ nke ikuku ikuku, ngwa agha ahụ nwere arụmọrụ dị mma ma na-ebelata nsị nke ngwa agha ahụ.Mgbawa na mbelata, ma na-abawanye ọnụ ọgụgụ nke ngwa ngwa.
3. Mmetụta nke cellulose ether na ciment hydration
Cellulose ether nwere retardation na hydration nke simenti dabeere ụrọ, na a na-eme ka mmetụta retardation na-abawanye na cellulose ether ọdịnaya.Ihe na-emetụta cellulose ether na hydration ciment bụ: usoro onunu ogwu, ogo nke etherification, ụdị ciment.
Oge nzipu: Feb-02-2023