Nkọwa:Iji dochie polyvinyl mmanya na-adịghị emebi emebi (PVA) slurry, hemp stalk cellulose ether-hydroxypropyl methylcellulose kwadebere site na ahịhịa mkpofu hemp nke ugbo, wee gwakọta ya na starch akọwapụtara iji kwadebe slurry. Polyester-owu agwakọtara yarn T/C65/35 14.7 tex bụ nha yana nwalere nha ya. Usoro mmepụta kacha mma nke hydroxypropyl methylcellulose bụ nke a: ọnụ ọgụgụ dị nta nke lye bụ 35%; oke mkpakọ nke alkali cellulose bụ 2.4; Oke mmiri mmiri nke methane na propylene oxide bụ 7: 3; tinye ya na isopropanol; nrụgide mmeghachi omume bụ 2 . 0MPa. Ogo a kwadebere site na ịgwakọta hydroxypropyl methylcellulose na starch a kapịrị ọnụ nwere COD dị ala ma bụrụ enyi na gburugburu ebe obibi, na ihe ngosi nha niile nwere ike dochie nha PVA.
Isi okwu:osisi hemp; hemp stalk cellulose ether; mmanya polyvinyl; cellulose ether nha nha
0.Okwu mmalite
China bụ otu n'ime mba nwere ahịhịa ahịhịa bara ụba nke ukwuu. Ihe a na-emepụta ihe ọkụkụ karịrị nde nde 700, na ọnụ ọgụgụ ojiji nke ahịhịa bụ naanị 3% kwa afọ. Ejibeghị nnukwu ahịhịa ahịhịa mee ihe. Ahịhịa bụ akụrụngwa akụrụngwa lignocellulosic bara ụba, nke enwere ike iji na nri, fatịlaịza, ihe nrụpụta cellulose na ngwaahịa ndị ọzọ.
Ka ọ dị ugbu a, ibelata mmetọ mmiri na-adịghị na usoro mmepụta akwa aghọwo otu n'ime isi mmalite mmetọ kasịnụ. Ọchịchọ oxygen oxygen nke PVA dị oke elu. Mgbe mmiri mkpofu ụlọ ọrụ nke PVA na-emepụta na usoro mbipụta na ịcha akwa ga-apụ n'ime osimiri ahụ, ọ ga-egbochi ma ọ bụ ọbụna mebie iku ume nke ihe ndị dị ndụ. Ọzọkwa, PVA na-eme ka ntọhapụ na ịkwaga ọla dị arọ na sediments na mmiri mmiri, na-eme ka nsogbu gburugburu ebe obibi dịkwuo njọ. Iji mee nchọpụta iji dochie PVA na akwụkwọ ndụ akwụkwọ ndụ, ọ dị mkpa ọ bụghị naanị iji mezuo ihe ndị a chọrọ nke usoro nhazi, kamakwa iji belata mmetọ mmiri na ikuku n'oge usoro nhazi.
N'ime ọmụmụ ihe a, a kwadebere hemp stalk cellulose ether-hydroxypropyl methylcellulose (HPMC) site na ahịhịa hemp mkpofu ọrụ ugbo, a tụlere usoro mmepụta ya. Na mix hydroxypropyl methylcellulose na kpọmkwem starch size dị ka nha maka nha, tụnyere PVA size, na-atụle ya n'ịrụ ọrụ.
1. Nnwale
1 . 1 Akụrụngwa na ngwa
Hemp, Heilongjiang; polyester-owu ngwakọta yarn T/C65/3514.7 tex; onwe-mere hemp stalk cellulose ether-hydroxypropyl methylcellulose; FS-101, starch emezigharịrị, PVA-1799, PVA-0588, Liaoning Zhongze Group Chaoyang Textile Co., Ltd.; propanol, ọkwa dị elu; propylene oxide, glacial acetic acid, sodium hydroxide, isopropanol, analytically dị ọcha; methyl chloride, nitrogen dị ọcha.
GSH-3L mmeghachi omume kettle, JRA-6 dijitalụ ngosi magnetik edemede mmiri bat, DHG-9079A electric kpo oku mgbe niile okpomọkụ ihicha oven, IKARW-20 n'elu n'ibu agitator, ESS-1000 sample size igwe, YG 061 / PC eletrọnịkị otu yarn ike mita, LFY-109B kọmpụta nke yarn abrasion tester.
1.2 Nkwadebe nke hydroxypropyl methylcellulose
1. 2. 1 Nkwadebe nke alkali eriri
Kewaa osisi hemp ahụ, gbanye ya na nchara 20 na pulverizer, tinye ntụ ntụ hemp na 35% NaOH ngwọta mmiri, wee gbanye ya na ụlọ okpomọkụ maka 1 . 5 ~ 2 . 0 h. Afanyekwa na impregnated alkali eriri nke mere na uka ruru nke alkali, cellulose, na mmiri bụ 1. 2:1. 2:1.
1. 2. 2 mmeghachi omume etherification
Tụba cellulose alkali a kwadebere n'ime kettle mmeghachi omume, tinye 100 ml nke isopropanol dị ka diluent, gbakwunye mmiri mmiri 140 ml nke methyl chloride na 60 ml nke propylene oxide, vacuumize, na pressurize na 2. 0 MPa, jiri nwayọọ nwayọọ bulie okpomọkụ ahụ ruo 45 ° C maka awa 1-2, ma meghachi omume na 75 ° C maka awa 1-2 iji kwadebe hydroxypropyl methylcellulose.
1. 2. 3 Post-processing
Gbanwee pH nke cellulose ether etherified na glacial acetic acid gaa na 6. 5 ~ 7 . 5, saa ya na propanol ugboro atọ, ma kpoo ya na oven na 85ºC.
1.3 Usoro mmepụta nke hydroxypropyl methylcellulose
1. 3. 1 Mmetụta nke ntụgharị ntụgharị na nkwadebe nke cellulose ether
Na-emekarị mmeghachi omume etherification bụ mmeghachi omume dị iche iche site n'ime ime ruo n'ime. Ọ bụrụ na enweghị ike mpụga, ọ na-esiri onye na-ahụ maka etherification ike ịbanye na crystallization nke cellulose, n'ihi ya, ọ dị mkpa ijikọta ihe niile etherification na cellulose site na mkpali. N'ime ọmụmụ ihe a, a na-eji reactor na-eme ka nrụgide dị elu mee ihe. Mgbe nnwale na ngosipụta ugboro ugboro, ọsọ ntụgharị ahọpụtara bụ 240-350 r / min.
1. 3. 2 Mmetụta nke itinye uche alkali na nkwadebe nke cellulose ether
Alkali nwere ike ibibi usoro kọmpat nke cellulose iji mee ka ọ zaa, na mgbe ọzịza nke mpaghara amorphous na mpaghara kristal na-agbanwe agbanwe, etherification na-aga nke ọma. Na usoro mmepụta nke cellulose ether, ọnụ ọgụgụ nke alkali eji na cellulose alkalization usoro nwere mmetụta dị ukwuu na etherification arụmọrụ nke etherification ngwaahịa na ogo nke nnọchi nke otu. N'ime usoro nkwadebe nke hydroxypropyl methylcellulose, ka ntinye nke lye na-abawanye, ọdịnaya nke metoxyl dị iche iche na-abawanye; N'aka nke ọzọ, mgbe ntinye nke lye na-ebelata, hydroxypropyl methylcellulose nke isi ọdịnaya dị ukwuu. Ọdịnaya nke methoxy otu bụ kpọmkwem nhata na ịta nke lye; ọdịnaya nke hydroxypropyl na-adaba na ntinye nke lye. Ahọpụtara akụkụ oke nke NaOH dị ka 35% ka emechara ule ugboro ugboro.
1. 3. 3 Mmetụta nke alkali cellulose pressing ratio na nkwadebe nke cellulose ether.
Ebumnuche nke ịpị eriri alkali bụ ịchịkwa ọdịnaya mmiri nke cellulose alkali. Mgbe ọnụọgụ ịpị dị ntakịrị, ọdịnaya mmiri na-abawanye, ntinye nke lye na-ebelata, ọnụ ọgụgụ etherification na-ebelata, onye na-ahụ maka etherification bụ hydrolyzed na mmeghachi omume n'akụkụ na-abawanye. , arụ ọrụ etherification na-ebelata nke ukwuu. Mgbe ọnụọgụ ịpị dị oke, ọdịnaya mmiri na-ebelata, cellulose enweghị ike ịza, ọ nweghịkwa mmeghachi omume, na onye na-ahụ maka etherification enweghị ike ịkpọtụrụ cellulose alkali zuru oke, mmeghachi omume ahụ adịghịkwa mma. Mgbe ọtụtụ ule na ịpị ntụnyere, e kpebisiri ike na oke ruru nke alkali, mmiri na cellulose bụ 1. 2:1. 2:1.
1. 3. 4 Mmetụta okpomọkụ na nkwadebe nke cellulose ether
N'ime usoro ịkwadebe hydroxypropyl methylcellulose, buru ụzọ chịkwaa okpomọkụ na 50-60 Celsius ma debe ya na okpomọkụ mgbe niile maka awa 2. Enwere ike ịme mmeghachi omume hydroxypropylation na ihe dịka 30 ℃, na ọnụego mmeghachi omume hydroxypropylation na-abawanye nke ukwuu na 50 ℃; jiri nwayọọ nwayọọ bulie okpomọkụ ruo 75 ℃, ma na-achịkwa okpomọkụ maka awa 2. Na 50 Celsius C, mmeghachi omume methylation anaghị emeghachi omume, na 60 Celsius, ọnụ ọgụgụ mmeghachi omume na-adị ngwa ngwa, na 75 Celsius C, ọnụego mmeghachi omume methylation na-abawanye ngwa ngwa.
Nkwadebe nke hydroxypropyl methylcellulose na njikwa okpomọkụ nke ọtụtụ ọkwa nwere ike ọ bụghị naanị ịchịkwa itule nke methylethyl na hydroxypropyl otu, kamakwa na-enyere aka belata mmeghachi omume n'akụkụ na mgbe ọgwụgwọ gasịrị, ma nweta ngwaahịa nwere usoro ezi uche dị na ya.
1. 3. 5 Mmetụta nke etherification n'ụlọnga usoro onunu ogwu na nkwadebe nke cellulose ether.
Ebe ọ bụ na hydroxypropyl methylcellulose bụ ihe na-ahụkarị ether na-abụghị ionic, a na-anọchi methyl na hydroxypropyl dị iche iche na hydroxypropyl methylcellulose macromolecular chains, ya bụ, C dị iche iche na ọkwa glucose ọ bụla. N'aka nke ọzọ, oke nkesa nke methyl na hydroxypropyl nwere mgbasawanye na enweghị usoro. Mmiri solubility nke HPMC metụtara ọdịnaya nke methoxy otu. Mgbe ọdịnaya nke methoxy otu dị ala, enwere ike igbari ya na alkali siri ike. Ka ọdịnaya methoxyl na-abawanye, ọ na-enwekwu mmetụta maka ọzịza mmiri. Ka ọdịnaya methoxy dị elu dị elu, mmiri na-eme ka ọ dịkwuo mma, a pụkwara ịmepụta ya ka ọ bụrụ slurry.
Ọnụ ego nke etherifying methyl chloride na propylene oxide nwere mmetụta kpọmkwem na ọdịnaya nke metoxyl na hydroxypropyl. Iji kwadebe hydroxypropyl methylcellulose na ezigbo mmiri solubility, a na-ahọrọ oke mmiri mmiri nke methyl chloride na propylene oxide dị ka 7: 3.
1.3.6 Usoro mmepụta kacha mma nke hydroxypropyl methylcellulose
The mmeghachi omume akụrụngwa bụ a elu-nrụgide kpaliri reactor; ọsọ ntụgharị bụ 240-350 r / min; oke nha nke lye bụ 35%; oke mkpakọ nke cellulose alkali bụ 2. 4; Hydroxypropoxylation na 50 ° C maka awa 2, methoxylation na 75 ° C maka awa 2; onye na-ahụ maka etherification methyl chloride na propylene oxide mmiri mmiri oke ruru 7: 3; agụụ; nrụgide 2 . 0 MPa; Isi ihe bụ isopropanol.
2. Nchọpụta na ngwa
2.1 SEM nke hemp cellulose na alkali cellulose
N'iji atụnyere hemp cellulose na-adịghị agwọ ọrịa na hemp cellulose na-emeso ya na 35% NaOH, enwere ike ịhụ n'ụzọ doro anya na cellulose alkalized nwere ọtụtụ ihe mgbawa elu, nnukwu elu elu, ọrụ dị elu na mmeghachi omume etherification dị mfe.
2.2 Mkpebi spectroscopy infrared
The cellulose ewepụtara na hemp stalks mgbe ọgwụgwọ na infrared ụdịdị dị iche iche nke HPMC kwadebere na hemp stalk cellulose. Otu n'ime ha, ike na obosara absorption band na 3295 cm -1 bụ ịgbatị mgbanaka absorption band nke HPMC Association hydroxyl Group, absorption band na 1250 ~ 1460 cm -1 bụ absorption band nke CH, CH2 na CH3, na absorption. band na 1600 cm -1 bụ absorption band nke mmiri na polymer absorption band. The absorption band na 1025cm -1 bụ absorption band nke C - O - C na polymer.
2.3 Mkpebi viscosity
Were ihe nlele nke mkpụrụ osisi cannabis akwadoro ma tinye ya na beaker iji dozie mmiri mmiri 2%, kpalie ya nke ọma, were viscometer tụọ viscosity na nkwụsi ike ya, wee tụọ viscosity nkezi ugboro atọ. Viscosity nke a kwadebere cannabis stalk cellulose ether sample bụ 11. 8mPa·s.
2.4 Ngwa nha nha
2.4.1 Slurry nhazi
A na-akwadebe slurry ahụ n'ime 1000ml nke slurry nke nwere akụkụ dị nta nke 3.5%, kpalie ya na mixer, wee tinye ya na mmiri ịsa ahụ ma kpoo ọkụ ruo 95 ° C maka 1 h. N'otu oge ahụ, rịba ama na a ga-emechi akpa nri pulp nke ọma iji gbochie ntinye nke slurry na-abawanye n'ihi ikuku mmiri.
2.4.2 Slurry nhazi pH, miscibility na COD
Gwakọta hydroxypropyl methyl cellulose na kpọmkwem starch size iji kwadebe slurry (1 # ~ 4 #), ma tụnyere PVA usoro slurry (0 #) iji nyochaa pH, miscibility na COD. The polyester-owu agwakọtara yarn T/C65/3514.7 tex bụ nha na ESS1000 sample igwe, na-nyocha ya arụmọrụ.
Enwere ike ịhụ na hemp stalk cellulose ether na kpọmkwem starch size 3 # bụ ezigbo nha usoro: 25% hemp stalk cellulose ether, 65% modified starch na 10% FS-101.
Ihe niile data nhata dị ka nha data nke nha PVA, na-egosi na nha agwakọta nke hydroxypropyl methylcellulose na starch akọwapụtara nwere arụmọrụ nha dị mma; pH ya dị nso na-anọpụ iche; hydroxypropyl methylcellulose na starch a kapịrị ọnụ COD (17459.2 mg/L) nke stachi agwakọta ọnụ dị obere karịa nke nha PVA (26448.0 mg/L), yana ọrụ nchekwa gburugburu ebe obibi dị mma.
3. Nkwubi okwu
Usoro mmepụta kachasị mma maka ịkwadebe hemp stalk cellulose ether-hydroxypropyl methylcellulose maka nha bụ ndị a: nnukwu nrụgide kpaliri reactor na ọsọ ntụgharị nke 240-350 r / min, obere akụkụ nke lye nke 35%, yana oke mkpakọ. nke alkali cellulose 2.4, na methylation okpomọkụ bụ 75 ℃, na hydroxypropylation okpomọkụ bụ 50 ℃, onye ọ bụla nọgidere na-enwe maka 2 awa, mmiri mmiri olu ruru nke methyl chloride na propylene oxide bụ 7: 3, agụụ, mmeghachi omume nrụgide bụ 2.0 MPa. isopropanol bụ ihe ngwọta.
A na-eji hemp stalk cellulose ether dochie PVA nha maka nha, na nha kacha mma bụ: 25% hemp stalk cellulose ether, 65% gbanwere starch na 10% FS-101. pH nke slurry bụ 6.5 na COD (17459.2 mg / L) dị ala karịa nke PVA slurry (26448.0 mg / L), na-egosi ezigbo arụmọrụ gburugburu ebe obibi.
A na-eji hemp stalk cellulose ether mee nha kama nha PVA iji mee ka yarn agwakọta polyester-owu T / C 65/3514.7tex. Ndekọ nha nha nhata. Ọhụrụ hemp stalk cellulose ether na gbanwetụrụ starch agwakọta size nwere ike dochie PVA size.
Oge nzipu: Feb-20-2023